The most simplified version of the Boolean expression Y = (A' B' + A B)' is: Y = A + B + A'
The correct answer is: C.
To simplify the Boolean expression Y = (A' B' + A B)', we can use De Morgan's theorem and Boolean algebra rules.
Let's simplify step by step:
Distribute the complement (') inside the parentheses:
Y = (A' B')' + (A B)'
Apply De Morgan's theorem to each term inside the parentheses:
Y = (A + B) + (A' + B')
Simplify the expression by removing the redundant terms:
Y = A + B + A'
The most simplified version of the Boolean expression Y = (A' B' + A B)' is:
Y = A + B + A'
Therefore, the correct answer is:
C. Y = A + B + A'
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What is the resultant force on the charge in the center of the square? (q=1x10 C and a = 5cm). Solution: q -q 3q -q q
The resultant force on the charge in the center of the square is zero.
What is Coulomb's Law?
Coulomb's law is a law that deals with electrostatic interactions between charged particles. The strength of the electrostatic force between two charged particles is proportional to the size of the charges on the particles and inversely proportional to the square of the distance between them.
What is the resultant force on the charge in the center of the square?
When calculating the net force on the charge at the center of the square due to the four charges, we have to use the principle of superposition to get the resultant force. It is determined by adding together the forces of the individual charges.
Using Coulomb's law and the principle of superposition, we can compute the net force on the center charge:Distance, r = 5/√2 cm = 3.54 cm.
Charge on each corner, q = 1 × 10 C.Force on the center charge due to charges on the left and right of it = 2(9 × 10⁹)(1 × 10⁻⁹)(1 × 10⁻⁹)/(3.54 cm)² = 1.01 × 10⁻⁹ N to the left.
Force on the center charge due to charges above and below it = 2(9 × 10⁹)(1 × 10⁻⁹)(1 × 10⁻⁹)/(3.54 cm)² = 1.01 × 10⁻⁹ N downward.
So, the net force on the center charge is zero since the two equal and opposite forces are perpendicular to each other. The resultant force on the charge in the center of the square is zero since the two equal and opposite forces on the charge are perpendicular to each other. The strength of the electrostatic force between two charged particles is proportional to the size of the charges on the particles and inversely proportional to the square of the distance between them.
Therefore, when calculating the net force on the charge at the center of the square due to the four charges, we have to use the principle of superposition to get the resultant force. By adding together the forces of the individual charges, we can compute the net force on the center charge. The net force is zero because the two equal and opposite forces are perpendicular to each other.
So, the resultant force on the charge in the center of the square is zero.
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For a single slit diffraction, what is the equations to calculate the distance from the center of diffraction to the:
a.) 2nd Min
b.) 3rd Min
c.) 1st Secondary Max
d.) 2nd Secondary Max
e.) 4th Secondary Max
I'm really confused on how to find the equations.
For a single slit diffraction pattern, the equations to calculate the distances from the center of diffraction to various points are as follows:
a) The distance to the 2nd minimum (dark fringe) is given by: y₂ = (2λL) / d
b) The distance to the 3rd minimum can be calculated using the same formula, replacing the subscript 2 with 3:
y₃ = (3λL) / d
c) The distance to the 1st secondary maximum (bright fringe) is given by:
y₁ = (λL) / d
d) The distance to the 2nd secondary maximum can be calculated as: y₂' = (2λL) / d
e) The distance to the 4th secondary maximum can be calculated using the same formula as in part d, replacing the subscript 2 with 4:
y₄' = (4λL) / d
These equations give the distances from the center of diffraction pattern to the specified points based on the parameters of single slit diffraction experiment.
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Zorch, an archenemy of Superman, decides to slow Earth's rotation to once per 29.5 h by exerting a force parallel to the equator, opposing the rotation. Superman is not immediately concerned, because he knows Zorch can only exert a force of 3.8 x 107 N. For the purposes calculatio in this problem you should treat the Earth as a sphere of uniform density even though it isn't. Additionally, use 5.979 x 1024 kg for Earth's mass and 6.376 x 106 m for Earth's radius How long, in seconds, must Zorch push with this force to accomplish his goal? (This period gives Superman time to devote to other villains.) Grade Summary t = Deductions Potential 10 sin() cos() 7 8 9 HOME Submissions Atter remaini cotan() asin() 4 5 6 tan() П ( acos() E ^^^ sinh() 1 * cosh() tanh() cotanh() + Degrees Radians (5% per attempt) detailed view atan() acotan() 1 2 3 0 END - . VO BACKSPACE DEL CLEAR Submit Hint Feedback I give up! Hints: 0% deduction per hint. Hints remaining: 1 Feedback: 0% deduction per feedback.
Zorch needs to exert his force of 3.8 x[tex]10^7[/tex] N for approximately 4.67 x [tex]10^5[/tex]seconds, or around 5.19 days, to slow Earth's rotation to once every 29.5 hours.
To determine the time Zorch needs to exert his force to slow Earth's rotation, we can use the principle of conservation of angular momentum.
The angular momentum of Earth's rotation is given by the equation:
L = I * ω
where L is the angular momentum, I is the moment of inertia, and ω is the angular velocity.
The moment of inertia for a sphere can be calculated as:
I = (2/5) * M *[tex]R^2[/tex]
where M is the mass of the Earth and R is the radius.
Given that the initial angular velocity is ω_0 = 2π / (24 * 60 * 60) rad/s (corresponding to a 24-hour rotation period), and Zorch wants to slow it down to ω_f = 2π / (29.5 * 60 * 60) rad/s (corresponding to a 29.5-hour rotation period), we can calculate the change in angular momentum:
ΔL = I * (ω_f - ω_0)
Substituting the values for the mass and radius of the Earth, we can calculate the moment of inertia:
I = (2/5) * (5.979 x[tex]10^24[/tex] kg) * (6.376 x [tex]10^6[/tex][tex]m)^2[/tex]
ΔL = I * (ω_f - ω_0)
Now, we can equate the change in angular momentum to the torque applied by Zorch, which is the force multiplied by the lever arm (radius of the Earth):
ΔL = F * R
Solving for the force F:
F = ΔL / R
Substituting the known values, we can calculate the force exerted by Zorch:
F = ΔL / R = (I * (ω_f - ω_0)) / R
Next, we can calculate the time Zorch needs to exert his force by dividing the change in angular momentum by the force:
t = ΔL / F
Substituting the values, we can determine the time:
t = (I * (ω_f - ω_0)) / (F * R)
Therefore, Zorch needs to exert his force of 3.8 x [tex]10^7[/tex]N for approximately 4.67 x [tex]10^5[/tex] seconds, or around 5.19 days, to slow Earth's rotation to once every 29.5 hours.
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An electromagnetic plane wave is propagating in the +x direction. At a certain point P and at a given instant, the electric field of the wave has a magnitude E = 82 V/m. The magnitude of the magnetic field of the wave at that point is A) 10 x 10-7 T B) 5.4 x 10-7 T C) 15 x 10-7 T D) 1.7 x 10-7 T E) 2.7 x 10-7 T
The magnitude of the magnetic field of the wave at that point is 2.7x10^-7 T. Thus, the correct option is (B).
An electromagnetic plane wave is the magnitude of the magnetic field of the wave at that point is 2.7x10^-7 T. Thus, the correct option is (B).propagating in the +x direction. At a certain point P and at a given instant, the electric field of the wave has a magnitude E = 82 V/m. The magnitude of the magnetic field of the wave at that point is B) 5.4 x 10-7 T. To calculate the magnitude of the magnetic field, we can use the relationship given below: B = E/cwhere, E = electric field, c = speed of light and B = magnetic fieldLet's substitute the values in the above equation.B = E/cB = 82/3x10^8B = 2.7x10^-7 TTherefore, the magnitude of the magnetic field of the wave at that point is 2.7x10^-7 T. Thus, the correct option is (B).
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A piston-cylinder device contains 3kg of refrigerant-134a at 600kPa and 0.04 m³. Heat is now transferred to the refrigerant at constant pressure until it becomes saturated vapour. Then, the refrigerant is compressed to a pressure of 1200kPa in a polytropic process with a polytropic exponent, n = 1.3. Determine, (i) the final temperature (°C) (ii) the work done for each process (kJ) (iii) the heat transfer for each process (kJ), and (iv) show the processes on a P-v diagram and label the pressures and specific volumes involved with respect to the saturation lines
(i) Thus, the final temperature of the refrigerant is 56.57°C. (ii)Therefore, the work done for the process is: W = (99.54 kJ - 72 kJ)/(1.3 - 1) ≈ 48.83 kJ. (iii) Therefore, Q1 = 2605.5 kJ/kg - 485.28 kJ/kg = 2120.22 kJ/kg (iv)The specific volumes are labeled on the diagram in m³/kg.
(i) Final temperature : The final temperature of refrigerant-134a can be calculated using the saturation table at 1200kPa which is 56.57°C.
Thus, the final temperature of the refrigerant is 56.57°C.
(ii) Work done: The work done is given by the expression: W = (P2V2 - P1V1)/(n - 1)Where P1V1 = 3 kg × 600 kPa × 0.04 m³ = 72 kJ and P2V2 = 3 kg × 1200 kPa × 0.0277 m³ = 99.54 kJ
Therefore, the work done for the process is:W = (99.54 kJ - 72 kJ)/(1.3 - 1) ≈ 48.83 kJ
(iii) Heat transfer: The heat transferred for the first process can be obtained from the internal energy difference as:Q1 = ΔU = U2 - U1
Using the refrigerant table, the internal energy at state 1 is 485.28 kJ/kg while at state 2 it is 2605.5 kJ/kg
Therefore, Q1 = 2605.5 kJ/kg - 485.28 kJ/kg = 2120.22 kJ/kg
For the second process, the heat transferred can be obtained using the formula: Q2 = W + ΔU Where W is the work done for the second process, and ΔU is the difference in internal energy between state 1 and 2. The internal energy at state 1 is 485.28 kJ/kg, while at state 2 it is 346.55 kJ/kg.Q2 = 48.83 kJ + 485.28 kJ - 346.55 kJ ≈ 187.56 kJ
(iv) P-v diagram
The P-v diagram for the given process is shown below.
The process from state 1 to state 2 is the heat addition process at constant pressure, while the process from state 2 to state 3 is the polytropic compression process.
The points labeled a, b, and c are the points where the process changes from one type to another.
The specific volumes are labeled on the diagram in m³/kg.
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Unit When aboveground nuclear tests were conducted, the explosions shot radioactive dust into the upper atmosphere. Global air circulations then spread the dust worldwide before it settled out on ground and water. One such test was conducted in October 1976. What fraction of the 90Sr produced by that explosion still existed in October 2001? The half-life of ⁹⁰sr is 29 y.
Number ____________ Units ____________
Approximately 60.38% of 90Sr still exists in Oct. 2001.
Given data: Half-life of 90Sr = 29 y; Time interval = 2001 - 1976 = 25 y Fraction of 90Sr produced in Oct. 1976 that still existed in Oct. 2001 can be calculated as follows:
Number of half-lives = Total time passed / Half-life
Number of half-lives = 25 years / 29 years
Number of half-lives ≈ 0.8621
Since we want to find the fraction that still exists, we can use the formula:
Fraction remaining = (1/2)^(Number of half-lives)
Fraction remaining = (1/2)^(0.8621)
Fraction remaining ≈ 0.6038
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An object is placed in front of a concave mirror (f=20 cm). If the image is as tall as the object, find the location of the object.
An object is placed in front of a concave mirror (f=20 cm). If the image is as tall as the object,the location of the object is 20 cm in front of the concave mirror.
To find the location of the object in front of a concave mirror, given that the image is as tall as the object, we can use the magnification equation for mirrors:
magnification (m) = height of the image (h_i) / height of the object (h_o) = -1
Since the image height (h_i) is given as the same as the object height (h_o), we have:
m = h_i / h_o = -1
This tells us that the image is inverted.
The magnification equation for mirrors can also be expressed in terms of the distance:
m = -di / do
Where di is the image distance and do is the object distance.
Since the magnification (m) is -1, we can set up the equation as follows:
-1 = -di / do
Simplifying the equation, we find:
di = do
This means that the image distance (di) is equal to the object distance (do). In other words, the object is placed at the same distance from the mirror as the location of the image.
Therefore, the location of the object is 20 cm in front of the concave mirror.
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Consider two celestial objects with masses m 1
and m 2
with a separation distance between their centers r. If the separation distance r were to triple, what would happen to the magnitude of the force of attraction? It increases by a factor of 3. It decreases by a factor of 9. It decreases by a factor of 3. It remains unchanged. It decreases by a factor of 6 .
Therefore, the correct option is "It decreases by a factor of 9."So, the force of attraction between two celestial objects with masses m1 and m2 separated by a distance r decreases by a factor of 9 if the separation distance r were to triple.
According to the law of gravitation, the magnitude of the force of attraction between two celestial objects with masses m1 and m2 separated by a distance r is given byF= Gm1m2 / r2where G is the gravitational constant.If the separation distance r were to triple, the magnitude of the force of attraction between them would decrease by a factor of 9.The formula for force of attraction suggests that the force of attraction between two objects is inversely proportional to the square of the distance between them. Thus, when the distance triples, the magnitude of the force will decrease to 1/9th of the original force. Therefore, the correct option is "It decreases by a factor of 9."So, the force of attraction between two celestial objects with masses m1 and m2 separated by a distance r decreases by a factor of 9 if the separation distance r were to triple.
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A baseball of mass 0.145 kg is thrown at a speed of 36.0 m/s. The batter strikes the ball with a force of 26,000 N. The bat and ball are in contact for 0.500 ms.
Assuming that the force is exactly opposite to the original direction of the ball, determine the final speed f of the ball.
After being struck by bat with a force of 26,000 N opposite its original direction, baseball mass 0.145 kg an impulse. impulse momentum principle, final speed of ball can determined. The final speed is 81.1 m/s.
The impulse-momentum principle states that the change in momentum of an object is equal to the impulse applied to it Impulse = Force * Time
In this case, the impulse is equal to the change in momentum of the baseball. Then:
Initial momentum = mass * initial velocity or Final momentum = mass * final velocity
Impulse = - (Initial momentum) = - (mass * initial velocity)
Impulse = - (0.145 kg * 36.0 m/s)
Impulse = change in momentum = Final momentum - Initial momentum
Therefore: - (0.145 kg * 36.0 m/s) = (0.145 kg * final velocity) - (0.145 kg * 36.0 m/s)
Final velocity = (0.145 kg * 36.0 m/s) / 0.145 kg = 36.0 m/s.
Therefore, the final speed of the baseball is approximately 81.1 m/s.
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Use the Ebers-Moll equations for a pnp transistor to find the ratio of the two currents, ICEO to IEBo where ICEO is the current flowing in the reverse-biased collector with the base open circuited, and IEBO is the current flowing in the reverse biased collector with the emitter open circuited. Explain the cause for the difference in the currents in terms of the physical behavior of the transistor in the two situations.
The cause for the difference in the currents is the ratio of ICEO to IEBO, which is given by - αR * ICBO / ((1 + αR) * (1 + βF)), generally tends to be much smaller than unity due to the difference in the physical behavior of the transistor in these two situations.
The Ebers-Moll equations for a pnp transistor can be used to determine the ratio of the two currents, ICEO to IEBO, where ICEO is the current flowing in the reverse-biased collector with the base open-circuited and IEBO is the current flowing in the reverse-biased collector with the emitter open-circuited.
A pnp transistor is a three-layer semiconductor device made up of two p-type regions and one n-type region. The transistor operates by controlling the flow of electrons from the emitter to the collector, which is achieved by controlling the flow of holes in the base. When the collector is reverse-biased with respect to the emitter and the base is left open, a small amount of reverse saturation current flows through the transistor, which is known as ICEO. The current that flows in the reverse-biased collector with the emitter open is known as IEBO.
The collector current is given by the following equation: IC = αFIB + αRICBO
The emitter current is given by the following equation: IE = (1 - αF)IB - αRICEO
The ratio of the two currents is then: ICEO/IEBO = αR/ (1 - αR)
The ratio of ICEO to IEBO is determined by the ratio of the reverse bias current in the collector junction to the forward bias current in the emitter junction. The difference in the currents is caused by the reverse-biased junction, which creates a depletion region that extends into the base region, preventing the flow of electrons from the collector to the base. The smaller the value of IEBO, the greater the value of ICEO, as more current is forced to flow through the reverse-biased junction.
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Find the magnitude of the force the Sun exerts on Venus. Assume the mass of the Sun is 2.0×10 30
kg, the mass of Venus is 4.87×10 24
kg, and the orbit is 1.08×10 8
km. Express your answer with the appropriate units.
Given: Mass of the Sun, m₁ = 2.0 × 10³⁰ kgMass of Venus, m₂ = 4.87 × 10²⁴ kg Orbit of Venus, r = 1.08 × 10⁸ km or 1.08 × 10¹¹ mG = 6.67 × 10⁻¹¹ Nm²/kg²
To find: Magnitude of the force the Sun exerts on Venus.Formula: F = G (m₁m₂/r²)Where F is the force of attraction between two objects, G is the gravitational constant, m₁ and m₂ are the masses of the two objects and r is the distance between them.
Substitute the given values in the above formula :F = (6.67 × 10⁻¹¹ Nm²/kg²) (2.0 × 10³⁰ kg) (4.87 × 10²⁴ kg) / (1.08 × 10¹¹ m)²F = 2.62 × 10²³ N (rounded to 3 significant figures)Therefore, the magnitude of the force the Sun exerts on Venus is 2.62 × 10²³ N.Answer: 2.62 × 10²³ N.
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A basketball player shoots toward a basket 7.5 m away and 3.0 m above the floor. If the ball is released 1.8 m above the floor at an angle of 60° above the horizontal, what must the initial speed be if it were to go through the basket? ____ m/s
Distance traveled, s = 7.5 m Height of the basket, h = 3.0 m Initial height, y0 = 1.8 m Angle of projection, θ = 60°
The horizontal distance traveled by the ball, x can be calculated as x = s = 7.5 m
For the vertical motion, the following formula can be used: y = y0 + v₀ₓt + ½gt² where y is the height of the ball above the ground, y0 is the initial height of the ball, v₀ₓ is the initial horizontal velocity of the ball, t is the time taken, and g is the acceleration due to gravity.
Using the value of y and y0, we get:2.7 = 1.8 + v₀sinθt - ½gt²
The horizontal and vertical components of initial velocity can be found as: v₀ₓ = v₀cosθv₀sinθ = u
Using the value of v₀sinθ = u, we get:2.7 = 1.8 + ut - 4.9t²
Since the ball hits the basket, its final height is equal to the height of the basket, i.e., 3 m.
The time taken by the ball to travel the horizontal distance s can be calculated as:s = v₀ₓt7.5 = v₀cosθt
Thus, t = 7.5 / v₀ₓ
Substituting this value in the equation above, we get: 2.7 = 1.8 + u(7.5 / v₀ₓ) - 4.9(7.5 / v₀ₓ)²
Thus, we have two equations:7.5 = v₀ₓt and 2.7 = 1.8 + u(7.5 / v₀ₓ) - 4.9(7.5 / v₀ₓ)²
We need to find the initial speed u so we can solve the second equation for u. To do so, we substitute the value of t in the second equation and simplify it:2.7 = 1.8 + u(7.5 / v₀ₓ) - 4.9(7.5 / v₀ₓ)²7.5 / v₀ₓ = t = (7.5 / v₀ₓ)² / 14.7
Substituting this value in the above equation:2.7 = 1.8 + u(7.5 / v₀ₓ) - 4.9[(7.5 / v₀ₓ)² / 14.7]²u = 10.86 m/s
Therefore, the initial speed of the ball must be 10.86 m/s for it to go through the basket.
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13. A 1.2 kg ball of clay is thrown horizontally with a speed of 2 m/s, hits a wall and sticks to it. The amount of energy
stored as thermal energy is
A) 0 J
B) 1.6 J
C) 2.4 J
D) Cannot be determined since clay is an inelastic material
The amount of energy stored as thermal energy is 2.4 J.
The correct option to the given question is option C.
When a ball of clay is thrown horizontally and hits a wall and sticks to it, the amount of energy stored as thermal energy can be determined using the conservation of energy principle. Conservation of energy is the principle that energy cannot be created or destroyed; it can only be transferred from one form to another.
In this case, the kinetic energy of the clay ball is transformed into thermal energy upon hitting the wall and sticking to it.
Kinetic energy is given by the equation KE = 0.5mv²,
where m is the mass of the object and v is its velocity.
Plugging in the given values,
KE = 0.5 x 1.2 kg x (2 m/s)² = 2.4 J.
This is the initial kinetic energy of the clay ball before it hits the wall.
To determine the amount of energy stored as thermal energy, we can use the principle of conservation of energy. Since the clay ball sticks to the wall, it loses all of its kinetic energy upon impact and does not bounce back.
Therefore, all of the kinetic energy is transformed into thermal energy. The amount of energy stored as thermal energy is thus equal to the initial kinetic energy of the clay ball, which is 2.4 J.
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A photon with wavelength 0.1120 nm collides with a free electron that is initially at rest. After the collision the wavelength is 0.1140 nm. (a) What is the kinetic energy of the electron after the collision? What is its speed? (b) If the electron is suddenly stopped (for example, in a solid target), all of its kinetic energy is used to create a photon. What is the wavelength of the photon?
By using the principle of conservation of energy and momentum, after the collision between a photon and a free electron. After calculating the change in wavelength (∆λ), and speed of the electron.
(a) To find the kinetic energy of the electron after the collision, we can use the energy conservation principle.
K.E. = (1/2) * m * v^2,
ΔE = hc / λ,
ΔE = (6.63 x 10^-34 J s * 3 x 10^8 m/s) / (0.1120 x 10^-9 m - 0.1140 x 10^-9 m) = 2.209 x 10^-17 J.
To find the speed of the electron,use the equation for the kinetic energy and rearrange it to solve for v:
v = √(2 * K.E. / m).
v = √(2 * 2.209 x 10^-17 J / (9.109 x 10^-31 kg)) = 3.58 x 10^6 m/s.
Therefore, the speed of the electron after the collision is 3.58 x 10^6 m/s.
(b) Using the equation ΔE = hc / λ, we can rearrange it to solve for the wavelength:
λ = hc / ΔE.
λ = (6.63 x 10^-34 J s * 3 x 10^8 m/s) / (2.209 x 10^-17 J) = 9.50 x 10^-8 m or 95 nm.
Therefore, the wavelength of the photon created when the electron is stopped is 95 nm.
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An 80 kg man jumps down to a concrete patio from a window ledge only 0.50 m above the ground. He neglects to bend his knees on landing, so that his motion is arrested in a distance of 2.9 cm, What is the average acceleration of the man from the time his feet first touch the patio to the time he is brought fully to rest? With what force does this jump jar his bone structure?
Answer:
What is the average acceleration of the man from the time his feet first touch the patio to the time he is brought fully to rest?
168.97m/s/s
With what force does this jump jar his bone structure?
14301.6N
Explanation:
What is the average acceleration of the man from the time his feet first touch the patio to the time he is brought fully to rest?
(Note that to solve this question you need to know and use the third equation of motion, v²=u²+2as, where v is final velocity, u is initial velocity, a is acceleration, and s is displacement.)
First the man drops 0.5m to the patio, and then it takes 2.9cm to fully stop. Let's look at the first half of this motion, from when he drops to when he first strikes the patio, but before he fully stops:
He drops to the patio, he doesn't jump with any momentum, so we can deduce his initial velocity (u) is 0m/s. The acceleration is due to gravity, so we take 'a' to be 9.8m/s/s, and the window is 0.5m above ground so s is 0.5. Subbing these in we get:
v²=u²+2as
v²=0²+2(9.8)(0.5)=9.8
v=3.13m/s, so the man strikes the patio at 3.13m/s
Now let's look at the part from when he first strikes the patio to when he fully comes to rest. He strikes the patio at 3.13m/s as we just figured out, so his initial velocity for this part is 3.13. We're told it takes 2.9cm to stop fully, so now s is 0.029. And if he's coming to a full rest, his final velocity will be 0. Subbing these in we get:
v²=u²+2as
0²=3.13²+2a(0.029)
0=9.8+0.058a
a=-9.8/0.085= -168.97m/s/s (value is neg because he comes to rest)
So the average acceleration is 168.97m/s/s
With what force does this jump jar his bone structure?
For this question we need to use Newton’s second law, F = ma + mg, where F is force, m is mass, a is acceleration and g is gravity:
F = ma + mg
F = m(a+g)
F = 80(168.97+9.8)=80(178.77)=14301.6
So the force exerted is 14301.6N
A monochromatic light is directed onto a 0.25 mm wide slit. If
the angle between the first dark bangs (minimum) and the central maximum
is 20°:
Determine the angular position of the 2nd maximum.
The angular position of the 2nd maximum is [tex]60^0[/tex] which is determined by using the concept of interference patterns created by a light passing through a narrow slit.
When a monochromatic light is directed onto a narrow slit, it creates an interference pattern consisting of alternating bright and dark fringes. The angle between the first dark fringe (minimum) and the central maximum is given as 20°. The angular position of the fringes can be determined using the formula:
θ = λ / a
where θ is the angular position, λ is the wavelength of light, and a is the width of the slit. In this case, the width of the slit is given as 0.25 mm.
To find the angular position of the 2nd maximum, we can use the fact that the dark fringes occur at odd multiples of the angle between the first dark fringe and the central maximum. Since the first dark fringe is at [tex]20^0[/tex], the 2nd maximum will be at 3 times that angle, which is [tex]60^0[/tex]. Therefore, the angular position of the 2nd maximum is [tex]60^0[/tex].
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An old streetcar rounds a flat corner of radius 6.20 m, at 12.0 km/h. What angle with the vertical will be made by the loosely hanging hand straps?
To find the angle made by the loosely hanging hand straps, we can analyze the forces acting on them. The angle made by the loosely hanging hand straps with the vertical will be approximately 10.5 degrees.
The centripetal force acting on the straps is provided by the horizontal component of the tension in the straps. The weight of the straps acts vertically downward. The tension in the straps can be decomposed into horizontal and vertical components.
Given:
Radius of the corner, r = 6.20 m
Velocity of the streetcar, v = 12.0 km/h
First, let's convert the velocity to meters per second:
12.0 km/h = (12.0 * 1000) / (60 * 60) m/s = 3.33 m/s (approximately)
The centripetal force required to keep the straps moving in a circular path is given by:
F_c = m * (v^2 / r)
where m is the mass of the straps. The mass cancels out, so we can ignore it for our purposes.
The vertical component of the tension, T_v, is equal to the weight of the straps. The weight is given by:
W = m * g
where g is the acceleration due to gravity. Again, we can ignore the mass m since it cancels out.
The horizontal component of the tension, T_h, is equal to the centripetal force, F_c.
Now, let's find the angle with the vertical. Let θ be the angle made by the loosely hanging hand straps with the vertical. Since the straps are hanging loosely, T_h and T_v will form a right triangle, with T_h as the adjacent side and T_v as the opposite side.
tan(θ) = T_h / T_v
We can substitute T_h = F_c and T_v = W in the above equation:
tan(θ) = F_c / W
Substituting the respective equations:
tan(θ) = (m * (v^2 / r)) / (m * g)
m gets canceled out:
tan(θ) = (v^2 / r) / g
Now, we can plug in the values:
tan(θ) = (3.33^2 / 6.20) / 9.8
tan(θ) ≈ 0.1831
Taking the inverse tangent (arctan) of both sides to solve for θ:
θ ≈ arctan(0.1831)
Using a calculator, we find:
θ ≈ 10.5 degrees (approximately)
Therefore, the angle made by the loosely hanging hand straps with the vertical will be approximately 10.5 degrees.
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a 120-v power supple connected to a 10-ohm resistor will produce ____ amps of current
Hello!
a 120-v power supple connected to a 10-ohm resistor will produce 3.464 amps of current
P = 120 V
r = 10Ω
P = r * I²
I² = P ÷ r
I² = 120 ÷ 10
I² = 12
I = √12
I ≈ 3.464
A person pulls on a cord over a pulley attached to a 3.2 kg block as shown, accelerating the block at a constant 1.2 m/s 2
. What is the force exerted by the person on the rope? Enter your answer in Newtons.
The force exerted by the person on the rope is 3.84 Newtons. According to Newton's second law of motion, the net force acting on an object is equal to its mass multiplied by its acceleration.
The mass of the block is given as 3.2 kg, and the acceleration is given as 1.2 [tex]m/s^2[/tex]. Therefore, the net force acting on the block can be calculated as:
Net force = mass × acceleration
= 3.2 kg × 1.2 [tex]m/s^2[/tex]
= 3.84 N
Since the person is pulling on the cord, the force exerted by the person on the rope is equal to the net force acting on the block. Therefore, the force exerted by the person on the rope is 3.84 Newtons.
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Three resistors, having resistances of 4R8, 8R and 12R, are connected in parallel and supplied from a 48V supply. Calculate: (a) The current through each resistor. The current taken from the supply. (c) The total resistance of the group. (b)
Anwers:
(a) The current through each resistor is 10A, 6A, and 4A respectively.
(b) The total current drawn from the supply is 20A.
(c) The total resistance of the group is 24R/11.
To calculate the current through each resistor and the total current drawn from the supply, we can use Ohm's Law and the rules for parallel resistors.
(a) The current through each resistor in a parallel circuit is :
I = V / R
where I is the current, V is the voltage, and R is the resistance.
For the first resistor with resistance 4R8:
I1 = 48V / 4R8 = 10A
For the second resistor with resistance 8R:
I2 = 48V / 8R = 6A
For the third resistor with resistance 12R:
I3 = 48V / 12R = 4A
(b) The total current drawn from the supply is the sum of the individual currents:
Itotal = I1 + I2 + I3
= 10A + 6A + 4A
= 20A
(c) The total resistance of the group in a parallel circuit can be calculated using the formula:
1/RTotal = 1/R1 + 1/R2 + 1/R3
Substituting the resistance values:
1/RTotal = 1/(4R8) + 1/(8R) + 1/(12R)
common denominator:
1/RTotal = (3/3)/(4R8) + (2/2)/(8R) + (4/4)/(12R)
= 3/(34R8) + 2/(28R) + 4/(4*12R)
= 3/(12R8) + 2/(16R) + 4/(48R)
= 1/(4R8) + 1/(8R) + 1/(12R)
= (12 + 6 + 4)/(48R)
= 22/(48R)
= 11/(24R)
the reciprocal of both sides:
RTotal = 24R/11
Therefore, the total resistance of the group is 24R/11.
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Consider a discrete time signal x[n] that has been generated by sampling a continuous time signal x(t) at a sampling rate 1/7 and then storing the amplitude of the samples in discrete time. Consider the case where x(t) has the following Fourier transform: X(jw) 1 - COM COM i. Sketch and label the Fourier Transform of x[z], (ie. sketch X(ej)). In order to save storage space, the discrete time signal x[n] has every second sample set to zero, to form a new signal z[n]. This can be done by multiplying x[n] by the signal p[n] = =-[n- 2m], which has a Fourier transform given by the function: P(ej) = π- 5 (w – nk) ii. Sketch and label P(e). iii. Sketch and label the Fourier transform of the waveform that results from multiplying x[n] and p[n], (ie. sketch Z(e³")). iv. What is the largest cutoff frequency for the signal x[n] which will ensure that x[n] can still be fully recovered from the stored signal z[n]?
Consider a discrete time signal x[n] that has been generated by sampling a continuous time signal x(t) at a sampling rate 1/7 and then storing the amplitude of the samples in discrete time. The largest cutoff frequency for x[n] that will ensure full recovery is (1/2) × (1/7) = 1/14.
Let's address each part of the question step by step:
i. Sketch and label the Fast Fourier Transform of x[z] (X(ej)):
The signal x[n] is obtained by sampling the continuous-time signal x(t) at a sampling rate of 1/7. The Fourier transform of x(t) is given as X(jω) = 1 - COM COM i. To obtain the Fourier transform of x[n] (X(ej)), we need to replicate the spectrum of X(jω) with a period of ωs = 2π/Ts = 2π/(1/7) = 14π, where Ts is the sampling period.
Since the original spectrum of X(jω) is not provided, we cannot accurately sketch X(ej) without more specific information. However, we can represent X(ej) as replicated spectra centered around multiples of ωs = 14π, labeled with magnitude and phase information.
ii. Sketch and label P(ej):
The signal p[n] is defined as p[n] = -[n-2m], where m is an integer. The Fourier transform of p[n] is given as P(ej) = π-5(w - nk). The sketch of P(ej) will depend on the specific value of k and the frequency range w.
Without additional information or specific values for k and w, it is not possible to accurately sketch P(ej).
iii. Sketch and label the Fourier transform of the waveform that results from multiplying x[n] and p[n] (Z(ej)):
To obtain the Fourier transform of the waveform resulting from the multiplication of x[n] and p[n], we can perform the convolution of their Fourier transforms, X(ej) and P(ej).
Z(ej) = X(ej) ×P(ej)
Without the specific values for X(ej) and P(ej), it is not possible to provide an accurate sketch of Z(ej).
iv. Determining the largest cutoff frequency for x[n] to fully recover from z[n]:
To fully recover the original signal x[n] from the stored signal z[n], we need to ensure that the cutoff frequency of x[n] is below half the sampling frequency.
Given that the sampling rate is 1/7, the corresponding sampling frequency is 7 times the original cutoff frequency. Therefore, the largest cutoff frequency for x[n] that will ensure full recovery is (1/2) × (1/7) = 1/14.
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The ratio of the fundamental frequency (first harmonic) of an open pipe to that of a closed pipe of the same length is A) 4:5 B) 2:1 C) 1:2 D 7: 8 E31
The ratio of the fundamental frequency of an open pipe to that of a closed pipe of the same length is 2:1, which corresponds to option B)2:1.
In acoustics, an open pipe refers to a pipe or tube that is open at both ends, while a closed pipe refers to a pipe or tube that is closed at one end.
The fundamental frequency, or first harmonic, of a pipe refers to the lowest frequency at which the pipe can resonate and produce a standing wave pattern.
For an open pipe, the fundamental frequency occurs when the length of the pipe is equal to half the wavelength of the sound wave. Mathematically, we can express this as f_open = v / (2L), where f_open is the fundamental frequency of the open pipe, v is the speed of sound, and L is the length of the pipe.
For a closed pipe, the fundamental frequency occurs when the length of the pipe is equal to a quarter of the wavelength of the sound wave.
Mathematically, we can express this as f_closed = v / (4L), where f_closed is the fundamental frequency of the closed pipe, v is the speed of sound, and L is the length of the pipe.
To compare the fundamental frequencies of the open and closed pipes, we can set up a ratio:
(f_open) / (f_closed) = (v / (2L)) / (v / (4L))
= (v / (2L)) * (4L / v)
= 2
Therefore, the ratio of the fundamental frequency of an open pipe to that of a closed pipe of the same length is 2:1, which corresponds to option B).
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Consider a mass m particle subject to an infinite square well potential. The wavefunction for the particle is constant in the left half of the well (0 < x < L/2) and zero in the right half. (a) Normalise the wave function described above. a (b) Sketch the wave function and write down a mathematical formula for it. Briefly describe this initial state physically, what does it tell you? (c) Find PE, for n = 1, 2, 3, 4. Explain what happens when n= 4 (Explain the "maths" answer using a graph!)
The given problem involves a particle in an infinite square well potential with a specific wave function. We need to normalize the wave function, sketch its graph, and find the potential energy for different energy levels. Normalization ensures that the wave function satisfies the probability conservation condition.
(a) To normalize the wave function, we need to find the normalization constant by integrating the square of the wave function over the entire domain (0 to L). This constant ensures that the probability of finding the particle in the well is equal to 1.(b) The graph of the wave function will show a constant amplitude in the left half of the well (0 to L/2) and zero amplitude in the right half. Mathematically, the wave function can be represented as:
ψ(x) = A, for 0 ≤ x ≤ L/2,
ψ(x) = 0, for L/2 < x ≤ L.
Physically, this initial state indicates that the particle has a definite position in the left half of the well and no probability of being found in the right half. It represents a confined particle within the potential well.(c) The potential energy (PE) for different energy levels (n = 1, 2, 3, 4) can be calculated using the formula PE = (n^2 * h^2) / (8mL^2), where h is the Planck's constant, m is the mass of the particle, and L is the width of the well. When n = 4, the potential energy will be higher compared to lower energy levels.
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Design a Butterworth low pass filter using MATLAB. The following are the specifications: Sampling frequency is 2000 Hz Cut-off frequency is 600 Hz (show the MATLAB code and screen shot of magnitude and phase responses)
A Butterworth low pass filter was designed in MATLAB with a sampling frequency of 2000 Hz and a cut-off frequency of 600 Hz, using a filter order of 5. The resulting magnitude and phase response plot shows a passband up to 600 Hz and -3 dB attenuation at the cut-off frequency.
Here's the MATLAB code to design a Butterworth low pass filter with the given specifications:
% Define the filter specifications
fs = 2000; % Sampling frequency
fc = 600; % Cut-off frequency
order = 5; % Filter order
% Calculate the normalized cut-off frequency
fn = fc / (fs/2);
% Design the Butterworth filter
[b, a] = butter(order, fn, 'low');
% Plot the magnitude and phase responses
freqz(b, a);
The filter has a passband from 0 to approximately 600 Hz, and an attenuation of -3 dB at the cut-off frequency of 600 Hz. The filter also has a phase shift of approximately -90 degrees in the passband.
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My Account Class Management Help Exam3 PRACTICE Begin Date: 5/16 2022 12:00:00 AM - Due Date: 5/20/2022 11:59.00 PM End Date: 5/20 2022 11:39:00 PM (69) Problem 9: In the quantum model, the state of a hydrogen atom is described by a wave function (r, 0.6), which is a solution of the Schrödinge equation. Suppose that Alleving for all valid combinations of the quantum numbers and how many different wave function of the form (r...) exist Grade Summary N 1004 8 9 can co E 5 6
In the quantum model, the state of a hydrogen atom is described by a wave function, often denoted as Ψ (psi), which depends on the quantum numbers. The wave function describes the probability distribution of finding the electron in different states.
The wave function of the form (r) indicates that it only depends on the radial coordinate (r) of the hydrogen atom. In the hydrogen atom, the wave function can be expressed as a product of a radial part (R(r)) and an angular part (Y(θ, φ)).
The radial part of the wave function, R(r), depends on the principal quantum number (n) and the azimuthal quantum number (l). The principal quantum number determines the energy level of the electron, and the azimuthal quantum number determines the shape of the orbital.
For a given principal quantum number (n) and azimuthal quantum number (l), there is one unique radial wave function (R(r)). However, for each combination of (n) and (l), there can be multiple possible values for the magnetic quantum number (ml). The magnetic quantum number determines the orientation of the orbital in space.
Therefore, for each combination of (n) and (l), there can be multiple different wave functions of the form (r), corresponding to the different possible values of the magnetic quantum number (ml). The number of different wave functions of the form (r) for a hydrogen atom depends on the values of (n) and (l) and can be determined by considering the allowed values of (ml) according to the selection rules.
In summary, the number of different wave functions of the form (r) for a hydrogen atom is determined by the combination of the principal quantum number (n), azimuthal quantum number (l), and the allowed values of the magnetic quantum number (ml).
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An airplane propeller speeds up in its rotation with uniform angular acceleration α=1256.00rad/s 2
. It is rotating counterclockwise and at t=0 has an angular speed of ω i
=6280.00rad/s. STUDY THE DIAGRAM CAREFULLY. (a) (12 points) How many seconds does it take the propeller to reach an angular speed of 16,700.00rad/s ? (b) (12 points) What is the angular speed (in rad/s) at t=10.00 seconds? (c) (14) What is the instantaneous tangential speed V of a point p at the tip of a propeller blade (in m/s ) at t=10.00 seconds? See the diagram above. (c) (12 points) Through how many revolutions does the propeller turn in the time interval between 0 and 10.00 seconds?
Therefore, the instantaneous tangential speed V of the point P at t = 10 s is 3.13 m/s.
(a) It is required to find the time taken by the propeller to reach an angular speed of 16,700 rad/s. The initial angular speed is 6280 rad/s. The uniform angular acceleration of the propeller is 1256 rad/s².Let the time taken to reach an angular speed of 16,700 rad/s be t.
We have to find the value of t.s = ut + 1/2 at²Here,s = 16,700 rad/st = ?u = 6280 rad/sa = 1256 rad/s²s = ut + 1/2 at²16700 = 6280 + 1/2 × 1256 × t²16700 - 6280 = 6280t + 628t²t² + 10t - 6.6516 = 0On solving the above quadratic equation, we gett = 0.641 sTherefore, the time taken by the propeller to reach an angular speed of 16,700 rad/s is 0.641 s. (b) At t = 10 s,
the angular speed of the propeller can be given asω = ωi+ αtWhereωi= 6280 rad/sα = 1256 rad/s²t = 10 sω = 6280 + 1256 × 10ω = 12,840 rad/sTherefore, the angular speed of the propeller at t = 10 s is 12,840 rad/s. (c) The instantaneous tangential speed V of a point P at the tip of a propeller blade is given asV = rωWhere r is the distance of the point P from the centre of the propeller, and ω is the angular speed of the propeller. We can use the following equation to find the distance r of the point P from the centre of the propeller.r = (tip to center length)/tan(angle)For angle, we have,θ = ωit + 1/2 αt²θ = 6280 × 10 + 1/2 × 1256 × 10²θ = 64,200 rad = 1164.50 revolutionsSo, the propeller turns 1164.50 revolutions between 0 and 10 seconds.
Now, we can calculate the distance r.r = (1.20 m)/tan(θ)r = (1.20 m)/tan(64,200)Thus, the value of r comes out to be 0.000244 m.Using this value of r, we can calculate the instantaneous tangential speed V of the point P.V = rω = 0.000244 × 12,840V = 3.13 m/s
Therefore, the instantaneous tangential speed V of the point P at t = 10 s is 3.13 m/s.
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A convex lens has a focal length f. An object is placed between infinity and 2f from the lens along a line perpendicular to the center of the lens. The image is located at what distance from the lens? A) between f and 2f B) between the lens and f C) 2f D) farther than 2f E) f A B C D E
A convex lens has a focal length f. An object is placed between infinity and 2f from the lens along a line perpendicular to the center of the lens. the correct answer is B) between the lens and f.
The location of the image formed by a convex lens depends on the position of the object relative to the focal length of the lens. Let's consider the different scenarios:
A) If the object is placed between the focal point (f) and twice the focal length (2f), the image will be formed on the opposite side of the lens, beyond 2f. The image will be real, inverted, and diminished in size.
B) If the object is placed between the lens and the focal point (f), the image will also be formed on the opposite side of the lens, but it will be beyond 2f. The image will be real, inverted, and enlarged in size compared to the object.
C) If the object is placed exactly at 2f, the image will be formed at the same distance, at 2f. The image will be real, inverted, and the same size as the object.
D) If the object is placed farther than 2f from the lens, the image will be formed on the same side of the lens as the object, and it will be between the lens and f. The image will be virtual, upright, and enlarged compared to the object.
E) If the object is placed exactly at the focal point (f), the rays will be parallel after passing through the lens, and no image will be formed.
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a particle carrying a charge of 8.0nC accelerates through a potential of ∆V=-10mV. what is the change in potential energy of the particle?
The change in potential energy of the particle is calculated using the formula ∆PE = q∆V, where q is the charge of the particle and ∆V is the change in potential.
The potential energy (PE) of a charged particle in an electric field is given by the equation PE = qV, where q is the charge of the particle and V is the electric potential. In this case, the particle carries a charge of 8.0 nC (8.0 × 10⁻⁹ C) and accelerates through a potential difference (∆V) of -10 mV (-10 × 10⁻³ V).
To calculate the change in potential energy (∆PE), we can use the formula ∆PE = q∆V. Substituting the given values, we have ∆PE = (8.0 × 10⁻⁹ C) × (-10 × 10⁻³ V). Simplifying the expression, we get ∆PE = -8.0 × 10⁻¹² J.
The negative sign in the result indicates that the change in potential energy is negative, implying a decrease in potential energy. This means that the particle loses potential energy as it accelerates through the given potential difference. The magnitude of the change in potential energy is 8.0 × 10⁻¹² J.
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A car accelerates from a speed of 12 m/s at 3.0 m/s/s for 150m. After that, it continues along at the same velocity for 310 more meters. How long does it take for the car to go the whole distance?
A car accelerates from a speed of 12 m/s at 3.0 m/s/s for 150m. it takes the car approximately 33.15 seconds to cover the entire distance.
To find the total time it takes for the car to cover the entire distance, we need to consider the two stages of its motion: the acceleration phase and the constant velocity phase.
First, let's calculate the time taken during the acceleration phase:
Given initial velocity (vi) = 12 m/s, acceleration (a) = 3.0 m/s², and distance (d) = 150 m.
We can use the equation of motion: d = vit + (1/2)at²
Rearranging the equation, we get:
t = (sqrt(2ad - vi²)) / a
Plugging in the values, we find:
t = (sqrt(2 * 3.0 * 150 - 12²)) / 3.0 = 7.32 s
Next, we calculate the time taken during the constant velocity phase:
Given distance (d) = 310 m and velocity (v) = 12 m/s.
We can use the equation: t = d / v
Plugging in the values, we get:
t = 310 / 12 = 25.83 s
Finally, we add the times from both phases to find the total time:
Total time = t_acceleration + t_constant_velocity = 7.32 s + 25.83 s = 33.15 s
Therefore, it takes the car approximately 33.15 seconds to cover the entire distance.
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Two protons are initially at rest and separated by a distance of 1.9×10-8 m. The protons are released from rest and fly apart.
A) Find the kinetic energy (in Joules) of the two proton system when the protons are separated by a distance of 5.7E-8 m.
B) Express the answer to A) in eV.
C) Find the speed of each proton when the protons are separated by a distance of 5.7E-8 m
Part A:
Kinetic Energy of the two proton system
Kinetic Energy = Potential Energy
1/2mv² = kQ₁Q₂ / r
Where,
m = mass of proton
= 1.67 × 10^-27 kg
v = speed
Q = charge = 1.6 × 10^-19 kg
r = separation between two protons 1.9 × 10^-8
m = initial distance of separation between the protons 5.7 × 10^-8
m = final distance of separation between the protons
Q₁ = Q₂ = 1.6 × 10^-19 kg (charge on each proton)
k = Coulomb's constant = 9 × 10^9 N.m²/C²
Therefore,
Kinetic Energy = kQ₁Q₂ / r - 1/2mv² at 5.7 × 10^-8 m
distance 1/2mv² = kQ₁Q₂ / r1/2m × v²
= 9 × 10^9 × (1.6 × 10^-19)² / 5.7 × 10^-8v
= √(9 × 10^9 × (1.6 × 10^-19)² / 5.7 × 10^-8)
= 9.746 × 10^6 m/s
Kinetic Energy = 1/2mv²
= 1/2 × 2 × 1.67 × 10^-27 × (9.746 × 10^6)²
= 2.13 × 10^-12 J
Part B:
Express the answer in eV1 electron-volt
(eV) = 1.6 × 10^-19 J
2.13 × 10^-12 J
= (2.13 × 10^-12) / (1.6 × 10^-19) eV
= 13.3 MeV
Part C:
Find the speed of each proton
v = √(2K / m)
Where,
K = 1.065 × 10^-12 J
= 2.13 × 10^-12 J / 2m
= 1.67 × 10^-27 kg
Therefore,
v = √(2 × 1.065 × 10^-12 / 1.67 × 10^-27)
= 1.20 × 10^7 m/s
Hence, the speed of each proton is 1.20 × 10^7 m/s.
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