The rate at which the distance from the plane to the station is increasing is 255(sqrt(3)) mi/h when the plane is 2 mi away from the station.
To solve this problem, we will use the Pythagorean theorem and related rates.
Let x be the horizontal distance from the radar station to the plane, y be the altitude of the plane, and z be the distance between the plane and the radar station. We are given that y = 1 mi and the speed of the plane is 510 mi/h. We want to find the rate at which z is increasing when z = 2 mi.
The Pythagorean theorem states that x^2 + y^2 = z^2. Differentiating both sides with respect to time t, we get:
2x(dx/dt) + 2y(dy/dt) = 2z(dz/dt)
Since the plane is flying horizontally and maintains a constant altitude, dy/dt = 0. We're given that dx/dt = 510 mi/h. Now, we need to find x when z = 2 mi. Using the Pythagorean theorem, we have:
x^2 + 1^2 = 2^2
x^2 = 3
x = sqrt(3)
Now, we can plug in the values for x, dx/dt, y, and z into the differentiated equation:
2(sqrt(3))(510) + 2(1)(0) = 2(2)(dz/dt)
Solving for dz/dt:
1020(sqrt(3)) = 4(dz/dt)
dz/dt = 255(sqrt(3)) mi/h
Thus, the rate at which the distance from the plane to the station is increasing is 255(sqrt(3)) mi/h when the plane is 2 mi away from the station.
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How can you theoretically explain it? 3. What will happen to acceleration of mass spring system if its mass is doubled? 4. A simple pendulum has time period 'T'. What will happen to its time period if it
3. If the mass is doubled, then acceleration will be halved. If both the net force and the mass are doubled, the acceleration will be unchanged.
4. If we reduce the length of the string by half then the time period will be ✓2 of the initial time period
Choose the correct statement describing, what will you see if you look at them with a telescope that has an angular resolution of 0. 5 arcsecond
If you look at them with a telescope that has an angular resolution of 0. 5 arcsecond, you will see two distinct stars. Therefore, the correct statement is option A.
An angular resolution of 0.5 arcseconds means that the telescope can distinguish between two objects that are at least 0.5 arcseconds apart. This is because angular resolution is the smallest angle between two objects that can be distinguished as separate entities.
In this case, if the two stars are separated by more than 0.5 arcseconds, they will be seen as two distinct stars. However, if they are separated by less than 0.5 arcseconds, they may appear as a single blurred image, which is known as the telescope's point spread function.
This is because the light from each star is diffracted by the telescope's aperture, causing them to overlap and blur together.
If the stars are separated by more than the telescope's angular resolution, they will be seen as separate and distinct points of light. Therefore, option (a) is the correct statement.
In summary, with an angular resolution of 0.5 arcseconds, a telescope can distinguish between two objects that are at least 0.5 arcseconds apart.
If the two stars are separated by more than 0.5 arcseconds, they will appear as two distinct stars, but if they are closer together, they may appear as a single blurred image.
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Complete Question:
Choose the correct statement describing, what will you see if you look at them with a telescope that has an angular resolution of 0.5 arcsecond.
a. Two distinct stars.
b. One point of light that is the blurred image of both stars.
c. Nothing at all.
The pressure of water on ground is 50000pa and at first floor it is 20,000pa .find the height of the first floor??
The height of the first floor is 7.5 meters if the water pressure on the ground is 50000 pa and 20,000 pa at the first floor.
How is the height of the first floor determined?Using the hydrostatic pressure equation, we can get the reference level as the water pressure at the ground floor:
P = ρgh
P is equal to 50000 Pa on the ground floor and 20000 Pa on the first. Water's constant density allows us to write:
P1/P2 = h1/h2
where P1 and h1 represent the ground floor pressure and height and P2 and h2 represent the first floor pressure and height.
Inputting the values provided yields:
50000/20000 = h1/h2
As a result, the first level is 2.5 times as tall as the bottom floor. The height of the first floor would be as follows if we used a typical height of 3 meters per storey:
2.5 × 3 = 7.5 meters for h2.
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Calculate the angular momentum of a 265 kg motorcycle traveling at 25 m/s. Traveling around a circular curve 500 m in radius
The angular momentum of a 265 kg motorcycle traveling at 25 m/s around a circular curve with a radius of 500 m is [tex]3,312,500 \;kg.m^2/s.[/tex]
To calculate the angular momentum of the motorcycle, we need to first find its angular velocity. Since the motorcycle is traveling around a circular curve, we can use the formula:
[tex]v = r\omega[/tex]
where v is the velocity of the motorcycle, r is the radius of the curve, and ω is the angular velocity.
Rearranging this formula to solve for ω, we get:
[tex]\omega = v/r[/tex]
Substituting the values given, we get:
[tex]\omega = 25 \;m/s \;/ \;500 m = 0.05 \;rad/s[/tex]
Next, we can use the formula for angular momentum:
[tex]L = I\omega[/tex]
where L is the angular momentum, I is the moment of inertia, and ω is the angular velocity.
For a point mass moving in a circular path, the moment of inertia is simply mr², where m is the mass of the motorcycle and r is the radius of the curve.
Substituting the values given, we get:
[tex]L = (265 \;kg)(500 \;m)^2(0.05 \;rad/s)[/tex]
[tex]L = 3,312,500 \;kg.m^2/s[/tex]
Therefore, the angular momentum of the motorcycle is [tex]3,312,500 \;kg.m^2/s.[/tex]
In summary, the angular momentum of a 265 kg motorcycle traveling at 25 m/s around a circular curve with a radius of 500 m is [tex]3,312,500 \;kg.m^2/s.[/tex]
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A wood block of mass m rests on a larger wood block of mass M that rests on a wooden table. The coefficients of static and kinetic friction between all surfaces are μs and μk , respectively.
A)What is the minimum horizontal force, F , applied to the lower block that will cause it to slide out from under the upper block? To solve this problem, assume that the force is applied so suddenly that both blocks slip at the same time. Express your answer in terms of some or all of the variables m , M , μs , μk , and appropriate constants. F=?
The minimum horizontal force required to cause the lower block to slide out from under the upper block is F = μs(Mg + mg)
How to calculate the forceLet's consider the forces acting on the lower block. The weight of the block is mg, where g is the acceleration due to gravity. The normal force acting on the block is N = Mg + mg, where M is the mass of the upper block. The maximum static frictional force that can act between the two blocks is μsN.
If the applied force is F, the net force acting on the lower block is F - μsN. If this net force is greater than zero, the block will slide. Therefore, we can write:
F - μsN > 0
Substituting for N, we get:
F - μs(Mg + mg) > 0
Solving for F, we get:
F > μs(Mg + mg)
Therefore, the minimum horizontal force required to cause the lower block to slide out from under the upper block isF = μs(Mg + mg).
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A Helmholtz resonator is a simple cylindrical cavity that suppresses most frequencies and strongly amplifies a few resonant frequencies.
A Helmholtz resonator is essentially an acoustic device that consists of a cavity (usually a cylinder or sphere) with a small neck or opening.
The cavity is typically filled with air, and when sound waves enter the resonator, they cause the air inside the cavity to vibrate at specific resonant frequencies. These frequencies are determined by the size and shape of the cavity, as well as the size and shape of the neck or opening.
One of the key features of a Helmholtz resonator is its ability to suppress most frequencies while strongly amplifying a few specific resonant frequencies.
This is because the resonator acts as a filter, allowing only certain frequencies to pass through the neck or opening and enter the cavity. Any other frequencies are reflected or absorbed by the resonator, resulting in a reduction in overall sound levels.
Helmholtz resonators are commonly used in a variety of applications, such as in acoustic engineering to reduce noise levels in buildings or vehicles, in musical instruments to enhance specific frequencies, and in scientific experiments to study the properties of sound waves.
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What was King Louis XVI's goal for Jacques-Louis David's Oath of the Horatil, 1784
1) to send a moral message
2) to educate the public about antiquity
3) to discourage a revolution
4) to decorate his palace
Number 3 is wrong
Q.3. Fill the table to describe the characteristics of the states of matter.
Do they have
definite shape?
Vapor
Water
Ice
States of
Matter
Do they have
definite volume?
Do they
compress?
Answer:
Three states of matter exist—solid, liquid, and gas. Solids have a definite shape and volume. Liquids have a definite volume,
Explanation:
According to the information, the table is completed as follows: Do they have definite shape? no (vapor), no (water), yes (ice); Do they have definite volume? no (vapor), yes (water), yes (ice); Do they compress? yes (vapor), no (water), no (ice).
How to fill the table to describe the characteristics of the states of matter?To fill the table to describe the characteristics of the states of matter we have to look for additional information of each state of matter and then complete the table. According to the information we can infer that the correct way to complete the table is:
Do they have definite shape? no (vapor), no (water), yes (ice); Do they have definite volume? no (vapor), yes (water), yes (ice); Do they compress? yes (vapor), no (water), no (ice).
Vapor | No | No | Yes
Water | No | Yes | No
Ice | Yes | Yes | No
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The length of speed's hand of watch is 1cm the change in velocity of is tip in 15 sec
The change in velocity of the tip of the second's hand in 15 seconds is: [tex]\pi /(30\sqrt2) cm/s[/tex]. The correct option is B.
To determine the change in velocity of the tip of the second's hand, we need to consider that the hand moves in a circular path with a radius of 1 cm. In 15 seconds, the angle covered is (15/60) × 360 = 90 degrees, or π/2 radians.
The initial velocity can be represented as (v1 = rω1) and the final velocity as (v2 = rω2), where r is the radius (1 cm) and ω is the angular velocity. Since the second's hand moves at a constant speed, the angular velocities are equal, and the change in velocity (∆v) can be calculated using the formula:
∆v = √(v1² + v2² - 2*v1*v2cos(π/2))
Since cos(π/2) = 0, the formula simplifies to:
∆v = √(v1² + v2²)
As v1 = v2 = rω,
∆v = √(2(rω)²) = rω√2 = (1cm)(π/30 rad/s)√2 = π/(30√2) cm/s
So, the change in velocity of the tip of the second's hand in 15 seconds is π/(30√2) cm/s. The correct option is B.
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Complete question:
The length of speed's hand of watch is 1cm the change in velocity of is tip in 15 sec
A. zero
B. π/(30√2)
C. π/30
D. 2π/(30√2)
A satellite of mass 20 kg is in orbit around the Earth. At the height of the satellite’s orbit, the gravitational field strength is one quarter of its strength on the surface of the Earth. The gravitational field strength on the surface of the Earth is 10 N/ kg. What is the weight of the satellite as it orbits the Earth?
The weight of a satellite of mass 20 kg in orbit around the Earth, where the gravitational field strength is one-quarter of its value on the surface of the Earth, is 50 N.
The weight of the satellite is given by the formula W = mg, where m is the mass of the satellite and g is the gravitational field strength at its position.
Since the gravitational field strength at the height of the satellite’s orbit is one quarter of its value on the surface of the Earth, we have
g = (1/4) x 10 N/kg = 2.5 N/kg.
Substituting the given values, we get W = 20 kg x 2.5 N/kg = 50 N.
The weight of the satellite is the gravitational force that acts on it due to the Earth’s gravitational field. This force depends on the mass of the satellite and the gravitational field strength at its position. The gravitational field strength varies with the distance from the Earth’s center, and it decreases as the distance increases.
The weight of the satellite is less than its mass because it is in freefall around the Earth, and it experiences a centripetal force due to the gravitational attraction of the Earth. This centripetal force exactly balances the gravitational force, so the satellite remains in orbit.
In summary, the weight of a satellite of mass 20 kg in orbit around the Earth, where the gravitational field strength is one-quarter of its value on the surface of the Earth, is 50 N.
The weight of the satellite depends on its mass and the gravitational field strength at its position, and it is less than its mass because of the centripetal force that balances the gravitational force and keeps the satellite in orbit.
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When one skater pushes another skater, how do they move? how can you predict the specific motion that will occur?
Answer:
M1 V1 + M2 V2 = 0 the center of mass remains at zero since no external forces are present
Ex: V1 = - M2 / M1 * V2
Hi, can someone pls help me solve this. It’s physics and the topic is electrostatics
Thanks
The total internal resistance of the battery is 1.5Ω
How to calculate the resistanceInternal resistance is a measure of the resistance to the flow of electric current within a device or system. It is the inherent resistance of the components within the system, including the wires, battery, and any other electrical components.
Since the three cells are connected in series, the total emf of the battery is equal to the sum of the emfs of each cell. Therefore, the total emf of the battery is:
E = 3E0
where E0 is the emf of each cell.
The internal resistance of each cell is given as 0.5Ω. Therefore, the total internal resistance of the battery is:
r = 3 x 0.5Ω = 1.5Ω
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What does lightning have in common with the shock you receive when you touch a doorknob?.
What lightning has in common with the shock you receive when you touch a doorknob is that both phenomena involve the transfer of electric charges between two objects or areas with different electrical potentials. This process is known as electrostatic discharge (ESD).
1. Formation of electric charge: In both cases, there is a buildup of electric charges due to friction or other processes. With lightning, this occurs within clouds, where ice particles collide and generate static electricity. In the case of the doorknob shock, static electricity builds up on your body as you walk across a carpet, for example.
2. Difference in electric potential: Once there is a significant charge buildup, there is a difference in electric potential between the charged object and another object or area with an opposite charge.
For lightning, this difference occurs between the cloud and the ground, while for the doorknob shock, it occurs between your body and the metal doorknob.
3. Discharge: When the electric potential difference is large enough, a sudden and rapid discharge of the built-up charges takes place. This results in the visible lightning bolt or the spark and shock experienced when touching the doorknob.
4. Release of energy: In both cases, the discharge of electric charges releases energy in the form of light, heat, and sound. This energy release is what causes the bright flash of lightning and the audible snap of a doorknob shock.
In summary, lightning and the shock you receive when touching a doorknob are similar because they both involve the buildup and discharge of electric charges between objects or areas with different electrical potentials, ultimately releasing energy in the process.
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In a circuit, we are using conducting wires made from Manganese If we assume there are 3 free electrons per an atom of manganese, what is its
electron density?
The electron density of a conducting wire made of manganese can be calculated by multiplying the number of manganese atoms per unit volume by the number of free electrons per manganese atom.
To determine the electron density of a wire made of manganese, we need to know the number of manganese atoms per unit volume and the number of free electrons per manganese atom. The electron density is defined as the number of free electrons per unit volume of the material.
Assuming the wire is made entirely of manganese, we can calculate the number of manganese atoms per unit volume using the density of manganese, which is 7.43 g/cm³. This can be converted to atoms/cm³ using the atomic weight of manganese, which is 54.94 g/mol, and Avogadro's number.
Next, we need to know the number of free electrons per manganese atom, which is given as 3 in the problem statement. Finally, we can calculate the electron density by multiplying the number of manganese atoms per unit volume by the number of free electrons per manganese atom.
In summary, the electron density of a conducting wire made of manganese can be calculated by multiplying the number of manganese atoms per unit volume by the number of free electrons per manganese atom. This requires knowledge of the density of manganese and the number of free electrons per atom.
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An archer shot a 0. 04 kg arrow at a target. The arrow accelerated at 7,000 m/s2 to reach a speed of 60. 0 m/s as it left the bow. How much force did the arrow have? ___N
The force exerted on the 0.04 kg arrow, which accelerated at 7,000 m/s² to reach a speed of 60.0 m/s, is 280 N.
To calculate the force exerted on the arrow, we can use Newton's second law of motion, which states that the force acting on an object is equal to its mass multiplied by its acceleration (F = m*a). In this case, the mass of the arrow (m) is 0.04 kg, and its acceleration (a) is 7,000 m/s².
Step 1: Identify the mass (m) and acceleration (a) of the arrow.
m = 0.04 kg
a = 7,000 m/s²
Step 2: Apply Newton's second law of motion (F = m*a) to calculate the force (F).
F = 0.04 kg * 7,000 m/s²
Step 3: Multiply the mass and acceleration values to obtain the force.
F = 280 N
Therefore, the force exerted on the arrow is 280 Newtons.
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Titan Tommy and the Test Tubes at a night club this weekend. The lead
instrumentalist uses a test tube (closed-end air column) with a 17. 2 cm air column. The
speed of sound in the test tube is 340 m/sec. Find the frequency of the first harmonic
played by this instrument.
The frequency of the first harmonic played by the instrument is approximately 990.7 Hz.
The frequency of the first harmonic played by the instrument can be calculated using the formula:
f = v / (2L)
where f is the frequency, v is the speed of sound in the test tube, and L is the length of the air column in the test tube.
The speed of sound in test tube is, 340 m/s.
In this case, L = 17.2 cm = 0.172 m. Substituting the given values into the formula, we get:
f = 340 m/s / (2 * 0.172 m)
f = 990.7 Hz
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Four forces (1,2,3 and 4) are in the x-y plane and act on an irregularly shaped object
The statement describes an irregularly shaped object experiencing four forces in the x-y plane, and elaborating on its nature, the magnitude and direction of the forces, and their intended outcome provides more context to the scenario.
The given statement describes a scenario in which an object of irregular shape is subjected to four forces acting in the x-y plane. To rephrase this statement, one could start by stating that there is an object, the shape of which is not uniform or regular, and this object is experiencing the influence of four different forces.
These four forces have been designated as 1, 2, 3, and 4, and all of them are acting within the x-y plane. One way to elaborate on this statement is to provide additional context about the nature of the object, the magnitude and direction of the forces, and the intended outcome of this scenario.
For example, the irregularly shaped object could be a vehicle or a piece of machinery, and the four forces could be the result of external factors such as wind, gravity, or applied forces. The magnitude and direction of each force could be significant in determining the overall motion of the object, and the ultimate outcome could be to cause the object to move in a certain direction or to remain stationary despite the presence of the forces.
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Complete question:
How would you rephrase the statement "Four forces (1,2,3 and 4) are in the x-y plane and act on an irregularly shaped object"?
What is one material resource that is potentially renewable if managed well?
One material resource that is potentially renewable if managed well is wood.
Wood can be obtained from trees, which are a renewable resource if they are harvested and replanted in a sustainable manner.
Sustainable forest management practices ensure that forests are used in a way that meets the needs of the present without compromising the ability of future generations to meet their own needs.
Wood is used for various purposes, such as construction, furniture, paper, and energy production. By managing forests well, we can ensure a continuous supply of wood for these purposes.
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achievement and challenges of science and technology explain?
Science and technology have had a significant influence on society, with both successes and difficulties.
The achievements can be noted as -
Medical Growth - Scientists and medical professionals have been able to create vaccinations, medicines, and surgical techniques thanks to advancements in technology that save millions of lives annually. This covers developments like cancer therapy, organ transplantation, and enhanced medical imaging. Communication Growth - People may now contact and communicate with one another more easily because to developments in communication technology. People may now communicate globally thanks to advancements in communication technologies, like the telephone and the internet.Commutation - Transport has also been enhanced by science and technology, becoming quicker and more effective. This includes technological advancements like electric autos, high-speed trains, and aeroplanes.The challenges can be noted as -
Environmental Degradation - Environmental degradation, including pollution, deforestation, and climate change, has been brought on by the development and usage of technology.Expensive - It may be expensive to develop and adopt new technology, which might put people and communities at a financial disadvantage. This may restrict access to these breakthroughs and worsen already existing inequities.Dependency - Genetic engineering, artificial intelligence, and privacy are just a few of ethical issues that have been brought up by these advancements. It is crucial to consider possible effects of these breakthroughs and make sure they are applied for the benefit of everybody.Read more about science and technology on:
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an object is placed at a concave mirror's center of curvature. the image produced by the mirror is located select one: a. between the focal point and the surface of the mirror. b. between the center of curvature and the focal point. c. at the center of curvature. d. at the focal point.
The image produced by a concave mirror when an object is placed at its center of curvature is located at the center of curvature. Option C is correct.
When an object is placed at the center of curvature of a concave mirror, the reflected light rays converge and intersect at the center of curvature. As a result, a real and inverted image of the object is formed at the same location as the object itself, which is the center of curvature.
It is important to note that the image formed by a concave mirror when an object is placed between the center of curvature and the focal point is real, inverted, and located beyond the center of curvature. When the object is placed at the focal point, the reflected light rays become parallel, and no image is formed. Finally, when the object is placed between the mirror and the focal point, the image formed is virtual, upright, and located behind the mirror. Option C is correct.
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The observation that individuals from separate species cannot mate to produce offspring is a guideline for identifying _____.
The observation that individuals from separate species cannot mate to produce offspring is a guideline for identifying distinct species. This criterion is known as the biological species concept.
The biological species concept defines a species as a group of interbreeding organisms that are reproductively isolated from other groups. In other words, individuals within a species can mate and produce viable, fertile offspring, while individuals from different species cannot.
The biological species concept has some limitations. For example, it cannot be applied to asexual organisms or fossils. Additionally, some species can interbreed and produce hybrid offspring, such as the mule, which is a hybrid of a horse and a donkey.
However, these hybrids are often sterile and cannot produce viable offspring of their own, which reinforces the concept that individuals from separate species cannot mate to produce offspring.
Overall, the biological species concept is a useful guideline for identifying distinct species and understanding their evolutionary relationships. It emphasizes the importance of reproductive isolation and genetic divergence in defining separate groups of organisms.
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The andromeda galaxy, m31, is in many ways similar to our own galaxy but slightly larger. the linear diameter of the andromeda galaxy along its longest axis is 140,000 light-years, but from our perspective, the andromeda galaxy has a maximum angular diameter of 3.18°. how far away is the andromeda galaxy?
The Andromeda Galaxy distance is approximately 2.52 million light-years away from us.
The Andromeda Galaxy (M31) is indeed similar to our own Milky Way galaxy, but slightly larger with a linear diameter of 140,000 light-years along its longest axis. To determine its distance from us, we can use the angular diameter, which is 3.18°.
We can use the small-angle formula to find the distance. This formula relates the angular diameter (in radians), the actual diameter, and the distance between the observer and the object:
angular diameter (radians) ≈ actual diameter / distance
First, we need to convert the angular diameter from degrees to radians:
3.18° * (π radians / 180°) ≈ 0.0555 radians
Now, plug in the values into the small-angle formula:
0.0555 radians ≈ 140,000 light-years / distance
To solve for the distance, divide both sides of the equation by 0.0555 radians:
distance ≈ 140,000 light-years / 0.0555 radians
distance ≈ 2,522,522 light-years
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Iodine-131 has a half life of 8 days. if there were 512 mg in a sample, how much iodine would be left in 32 days?
In a 32-day period, a 512 mg sample of Iodine-131 will be reduced to 32 mg.
7
Since the half-life is 8 days, we can divide 32 days by the half-life to find the number of half-lives that have occurred: 32 days ÷ 8 days/half-life = 4 half-lives.
Now, for each half-life, the amount of Iodine-131 will decrease by half. After 1 half-life (8 days), 512 mg will become 256 mg. After 2 half-lives (16 days), it will be 128 mg. After 3 half-lives (24 days), it will be 64 mg. Finally, after 4 half-lives (32 days), the amount of Iodine-131 remaining in the sample will be 32 mg.
So, in a 32-day period, a 512 mg sample of Iodine-131 will be reduced to 32 mg.
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Need help real quick!!! Make Brainlist!!!!
I need help commenting this post, in a paragraph.
It's not just here in the United States that we're seeing this, London has also added this category to their marathon.
How to comment?This is an example of how society is constantly evolving and recognizing the need for inclusion and diversity. The social construction of gender and gender identity has traditionally been binary, with individuals being categorized as either male or female. However, as society has become more aware and accepting of non-binary gender identities, we are seeing a shift in the way that institutions and organizations are accommodating these individuals.
By creating a non-binary category in marathons, organizers are acknowledging the importance of inclusivity and providing a space for non-binary individuals to participate in sports without being forced to conform to binary gender categories.
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If a 325 W heater has a current of 6.0 A, what is the resistance of the heating element?
O 10 Ohms
O 50 Ohms
88 Ohms
9 Ohms
The resistance of the heating element is 9 Ohms
What is Ohm's law?Ohm's law states that the current (I) flowing through a conductor between two points is directly proportional to the voltage (V) across the two points and inversely proportional to the resistance (R) between them. Mathematically, this can be expressed as:
V = IR
Equation:In this scenario, we are given the power (P) and current (I) of a heater, and we are asked to find its resistance (R). Power can be calculated using:
P = IV
where V is the voltage across the heater. Since we are not given the voltage, we can rearrange Ohm's law to solve for the resistance:
R = V/I
Substituting the formula for power into this equation, we get:
R = (V/I) = (P/I²)
Substituting the given values of power and current, we get:
R = (325 W) / (6.0 A)² = 9.0 Ohms
The correct answer is (D).
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As fluids are transported over a long distance, what happens to the fluid pressure in the pipes? Why does this happen?
As fluids are transported over a long distance, the fluid pressure in the pipes tends to decrease. This occurs due to several factors, including friction, elevation changes, and pipe diameter variations.
1. Friction: As the fluid flows through the pipes, it encounters resistance from the pipe walls, which is known as friction. This friction causes the fluid to lose energy, resulting in a drop in pressure. The longer the distance, the more friction the fluid experiences, and the greater the pressure loss.
2. Elevation changes: When a fluid flows through pipes with elevation changes, the pressure can vary due to gravity. Fluids flowing uphill experience a decrease in pressure due to the energy required to move against gravity. Conversely, fluids flowing downhill may experience an increase in pressure as gravity aids in the movement.
3. Pipe diameter variations: If the pipe diameter changes along the path, it can also affect the fluid pressure. As the fluid moves from a larger diameter pipe to a smaller one, the flow velocity increases, resulting in a decrease in pressure according to Bernoulli's principle.
In summary, as fluids are transported over long distances, the fluid pressure in the pipes generally decreases due to factors such as friction, elevation changes, and pipe diameter variations. This happens because the fluid loses energy as it overcomes these obstacles during its flow, leading to a reduction in pressure.
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Hi, can someone pls help me solve this? Thanks. It’s physics and the topic is electrostatics
The effective external resistance of the circuit is 3.5 ohms, the current in the circuit is 1.71 A, the lost voltage in the battery is 1.285 V, and the current in one of the 3-ohm resistors is 1.71 A.
What is the effective external resistance?To solve this problem, we can use Kirchhoff's circuit laws and Ohm's law.
First, let's calculate the equivalent resistance of the parallel combination of two 3-ohm resistors:
1/Rp = 1/3 + 1/3
Rp = 1.5 ohm
Now, let's calculate the total external resistance of the circuit:
R = 2 + Rp
R = 2 + 1.5
R = 3.5 ohm
Using Ohm's law, we can calculate the current in the circuit:
V = IR
I = V/R
I = 6/3.5
I = 1.71 A
The lost voltage in the battery is given by:
VL = E - Ir
VL = 23 - 1.711.5
VL = 1.285 V
The current in one of the 3-ohm resistors is the same as the current in the circuit:
I = 1.71 A
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Complete question:
A battery Of 3 cells is arranged in series each of emf 2V and internal resistance of 0.5-ohm and connected to a 2-ohm resistor.
In a series with a parallel combination of two 3-ohm resistors,
calculate the effective external resistancecalculate the current in the circuitthe lost Voltage calculate the current in one of the 3 ohm resistance6) In a purely electric vehicle, energy usually is stored in batteries. The stored energy is used to
power the vehicle until the energy is depleted, and then energy has to be stored once more by
recharging the batteries. An electric wheelchair has a mass of 26 kg and is custom–designed for a
person with a mass of 80. 0 kg. The stored energy available in its batteries is 2. 4106
J. The
wheelchair motor requires a power of 340. 0 W for driving under typical conditions. This is
sufficient to propel the person in the wheelchair along at a speed of 24 km/h.
a. Determine the work done by the motor when the wheelchair starts at rest and speeds up to
its normal speed.
b. Determine the maximum distance that the wheelchair can travel on a horizontal surface at its
normal speed, using its stored energy. (Ignore the energy needed for it to speed up when it
starts. )
c. Suppose that 0. 023 percent of the power required for driving is expended against drag due
to the flexing of the wheelchair’s soft rubber tires. Calculate the magnitude of the drag force
The magnitude of the Drag force is 0.0117 N
a) To determine the work done by the motor when the wheelchair starts at rest and speeds up to its normal speed, we can use the work-energy theorem:
Work = (1/2) * m * (vf^2 - vi^2)
Where m is the total mass of the wheelchair and person (26 kg + 80 kg = 106 kg), vf is the final speed (24 km/h = 6.67 m/s), and vi is the initial speed (0 m/s).
Work = (1/2) * 106 kg * (6.67 m/s)^2
Work ≈ 1,491.1 J
b) To determine the maximum distance the wheelchair can travel on a horizontal surface at its normal speed, we can use the following formula:
Distance = (Stored energy) / (Power * Time)
First, we need to calculate the time that the wheelchair can run at normal speed:
Time = (Stored energy) / (Power)
Time = 2.4 * 10^6 J / 340 W
Time ≈ 7,058.8 s
Now we can calculate the distance:
Distance = (6.67 m/s) * (7,058.8 s)
Distance ≈ 47,102.4 m
c) To calculate the magnitude of the drag force due to the flexing of the wheelchair's soft rubber tires, we can use the following formula:
Drag force = (Power expended against drag) / (speed)
First, we need to calculate the power expended against drag:
Power expended against drag = 0.00023 * 340 W
Power expended against drag ≈ 0.0782 W
Now we can calculate the drag force:
Drag force = 0.0782 W / 6.67 m/s
Drag force ≈ 0.0117 N
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A lot of points
describe, in terms of subatomic particles, what occurs when a person experiences a static "shock"
The static shock is caused by the transfer of electrons between surfaces, creating an electric charge buildup that ionizes air molecules, resulting in a spark. Electrons and ions are the subatomic particles involved.
When a person experiences a static shock, it is due to the buildup of excess electric charge on the surface of their body. This excess charge is caused by the transfer of electrons between two surfaces that come into contact and then separate. The transfer of electrons causes an imbalance of charges, resulting in a buildup of static electricity.
The electric charge buildup creates an electric field that can be strong enough to ionize air molecules. This ionization creates a plasma, which is a gas made up of ionized particles. The plasma channels the electric charge from the person's body to the surrounding air, creating a spark that we see as a static shock.
The subatomic particles involved in this process are electrons and ions. Electrons are negatively charged subatomic particles that are transferred between surfaces to create a buildup of static electricity. Ions are atoms or molecules that have gained or lost electrons, resulting in a positive or negative charge.
In summary, a static shock occurs due to the transfer of electrons between surfaces, creating an imbalance of electric charge on the person's body.
This electric charge buildup ionizes air molecules, creating a plasma that channels the electric charge to the surrounding air, resulting in a spark that we see as a static shock. The subatomic particles involved in this process are electrons and ions.
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During the course of a hot, summer day the temperature of the wooden beam slowly increases from 15°C at night to a final temperature of 35°C during the day. Calculate the amount of heat transferred to the wooden beam if it has mass 60kg
The amount of heat transferred to the wooden beam if it has mass 60kg is 70800 J
What is amount?Amount is a mathematical concept that refers to the quantity or size of something. It can be used to describe a numerical value, such as a monetary amount, a quantity of units of measurement, or a count of items. Amounts can also be expressed in terms of fractions, decimals, or percentages. In everyday use, it is often used to refer to the total sum of money, goods, or services involved in a transaction. For example, when discussing a purchase, one might say "the amount was $25." Amount is also used in a more general sense, to refer to a large quantity or number of something. For example, one might say "there was a huge amount of people at the event."
Heat transferred (Q) = mass (m) x specific heat capacity (c) x change in temperature (ΔT)
Q = 60 kg x 0.84 J/g°C x (35°C - 15°C)
Q = 70800 J
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