The time taken can be calculated by the equation: t = -RC ln(15/50)
To determine how long after closing the switch s the potential across each capacitor will be reduced to 15.0 V, we need to know the initial potential across the capacitors, the capacitance value and the resistance in the circuit.
When a switch is closed, the potential across a capacitor decreases exponentially with time according to the equation:
V(t) = V0e^(-t/RC)
Where V0 is the initial potential across the capacitor, t is time, R is the resistance in the circuit, and C is the capacitance.
In this case, the initial potential across each capacitor is 50.0 V, and the resistance in the circuit is 80 ohms.
To find the capacitance value we need to know that the capacitors are parallely connected, which means that the total capacitance is the sum of the individual capacitances:
Ctotal = C1 + C2
Once we have the capacitance value, we can find the time constant RC:
RC = R / Ctotal
Now we can use the equation above to find the time it takes for the potential to decay to a certain percentage of the initial value.
For example, if we want to find the time it takes for the potential to decay to 15.0 V (30% of the initial value), we can use the following equation:
15.0 V = 50.0 Ve^(-t/RC)
and we can solve for t:
t = -RC ln(15/50)
It's worth noting that this is an estimation and that in real world situations the resistance and capacitance values are also affected by other factors such as leakage current or parasitic capacitances.
Read more about Capacitance:
https://brainly.com/question/14746225
#SPJ4
A child whirls a ball at the end of a rope, in a uniform circular motion. Which of the following 19. statements is NOT true? (A) The radius of the circle remains constant the entire time the ball is moving in a circular path. (B) The direction of the tension exerted by the string on the ball is directed towards the center of the Cular path. The magnitude of the ball's acceleration is directly proportional to the length of the string. The velocity of the ball is constant the entire time the ball is moving in a circular path.
The velocity of the ball is constant the entire time the ball is moving in a circular path at the end of a rope, in a uniform circular motion.
Hence, Option D is correct.
A particular kind of motion in which an object moves in a circle at a fixed speed is known as uniform circular motion. Any point on a propeller, for instance, that is rotating at a consistent speed is doing uniform circular motion. Other examples include the watch's second, minute, and hour hands.Because velocity depends on the direction of travel, and in circular motion the object's direction changes at each point, for a body moving in uniform circular motion, the speed the object reaches will remain constant, not the velocity. Acceleration will remain constant as long as speed doesn't change.To know more about Circular motion here
https://brainly.com/question/28503060
#SPJ4
Un avioncito de control remoto viaja con una velocidad constante de 20 km/hr el tiempo en que se realiza el vuelo es de 25 minutos antes que se agote la pila. ¿Qué distancia en pies y kilómetros recorrió el avioncito?
Answer:
Distancia = 27559.06 pies
Explanation:
Dados los siguientes datos;
Velocidad = 20 km/hr
Tiempo = 25 minutos
Conversión de minutos a horas;
60 minutos = 1 hora
25 minutos = 0.42 horas
Para encontrar la distancia;
Distancia = velocidad * tiempo
Distancia = 20 * 0.42
Distancia = 8.4 km
Conversión de kilómetros a pies;
1 km = 3280.84 pies
8.4 kilometros = 8.4 * 3280,84 = 27559,06
Distancia = 27559.06 pies
How much work is being done with 200 N of force over 426 meters?
Answer:
The work done is 85200 J or N•m
Explanation:
Here,
Force = 200 N
Distance = 426 m
Now, For work done
Formula:Work = Force × Distance.
W = F × d
W = 200 × 426
W = 85200 J or N•m
Thus, The work done is 85200 J or N•m
-TheUnknownScientist
name the instrument that can be used to measure specific heat capacity
Answer:
thermomiter
Explanation:
Answer:
A thermometer is specifically made to measure on point heat or coldness of a item,
How much heat is required to be removed from a 8kg liquid water at 33 °C to be transformed into ice at 0 °C?
The Total heat required to transform 8 kg of liquid water at 33 °C to the ice at 0 °C is 13,019 J.
The heat required to be removed from a liquid to transform it into a solid is called the heat of fusion. For water, the heat of fusion is approximately 334 J/g. To calculate the amount of heat required to transform 8 kg of liquid water at 33 °C to the ice at 0 °C, we'll need to take into account both the heat of fusion and the heat required to lower the temperature of the water from 33 °C to 0 °C.
First, we'll calculate the heat required to lower the temperature of the water from 33 °C to 0 °C. This can be calculated using the formula:
Q = mcΔT
where Q is the heat required, m is the mass of the water (8 kg), c is the specific heat capacity of water (4.186 J/g·°C), and ΔT is the change in temperature (3temperature change
Q = (8 kg)(4.186 J/g·°C)(33 °C) = 10,347 J
Next, we'll calculate the heat of fusion by multiplying the heat of fusion of water (334 J/g) by the mass of the water (8 kg).
Q = (334 J/g)(8 kg) = 2672 J
To sum up, the total heat required to transform 8 kg of liquid water at 33 °C to ice at 0 °C, is equal to the heat required to lower the temperature + heat of fusion which is 10,347 J + 2672 J = 13,019 J
Learn more about heat:
https://brainly.com/question/1429452
Which statements describe properties of stars? Check all that apply.
The properties of stars are: mass, age, distance, metallicity (chemical composition), variability and motion through space.
What is star?An astronomical object known as a star is made up of a bright plasma spheroid that is held together by gravity. The Sun is the star that is closest to Earth.
Other stars are also visible at night with the unaided eye, but because to their great distances from Earth, they appear as stationary points of light. Many of the brightest stars have names, and the most notable stars have been grouped into constellations and asterisms.
Star catalogues have been put out by astronomers that list the known stars and offer standardized stellar labels.
Learn more about star here:
https://brainly.com/question/7379319
#SPJ1
Answer: Stars produce energy through nuclear fusion.
Stars are massive objects composed of gas.
Stars are composed primarily of hydrogen and helium.
P.S can I get the brainiest?
-----PLZ HELP ME-----Plants use energy from sunlight, water, and carbon dioxide to produce sugar. Which structureis found only in plant cells and helps plants capture energy from sunlight?
A. Vacuole
B. Nucleus
C. Chloroplast
D. Cell membrane
Answer:
c. Chloroplas
Explanation:
What pressure, in pascals, can you create by exerting a force of 480 N with your tooth on an area of 0.95 mm2
According to the given statement The pressure exerted by the tooth is 506,315.78 Pa.
What is pressure?Pressure is a measure of the force exerted on a surface per unit area. It is a scalar quantity and is measured in units of force per unit area, such as pascals (Pa), pounds per square inch (psi), or atmospheres (atm).
It can be calculated using the formula:
Pressure (Pa) = Force (N) / Area (m²)
Given that the force exerted is 480 N and the area of contact with the tooth is 0.95 mm^2, we can use the formula to find the pressure exerted:
Pressure (Pa) = 480 N / (0.95 x 10⁻³ m²)
To convert mm² to m², we divide by 10⁶
Pressure (Pa) = 480 N / (0.95 x 10⁻³ m²) = 506,315.78 Pa
Hence, the pressure exerted by the tooth is approximately 506,315.78 Pa.
To learn more about pressure from the given link:
brainly.com/question/28012687
#SPJ4
define improved chulo advantages
Answer:
The benefits of the improved chulha is to reduce fuel consumption leading to saving in fuel wood. It reduces the smoke so the women can save time & saving in time leading to more economic activity, employment generation, etc.
Explanation:
The benefits of the improved chulha is to reduce fuel consumption leading to saving in fuel wood. It reduces the smoke so the women can save time & saving in time leading to more economic activity, employment generation, etc.
Draw conclusions: Objects falling through air are slowed by the force of air resistance. Which objects were slowed the most by air resistance
Due to this air resistance, Galileo discovered that heavier or more dense things fall more quickly than less dense ones. Together, a brick and a feather fell. The feather falls more slowly due to air resistance.
Descending against air resistance an object often experiences some air resistance as it falls through the air. The leading surface of the object collides with air molecules, creating air resistance. Several variables affect how much air resistance the object really experiences.
Therefore, heavier things fall quicker than lighter ones because the force of gravity acting on them is greater. As a result, heavier objects accelerate at faster speeds until the force of air resistance acts on them.
To know more about air resistance
https://brainly.com/question/25748718
#SPJ4
An ambulance racing down the highway has 14,600,000 J of energy. It is moving 34 m/s. What is the mass of the ambulance? (Round
your answer to two decimal places) KE=1/2mva^2
The ambulance weighs 16.97 tons, and the kinetic energy of an object is given by the formula KE = 1/2mv2, where m is the object's mass, v is its velocity, and KE is the kinetic energy.
What is kinetic energy and above explanation?Kinetic energy is the energy an object possesses due to its motion, and it is calculated as 1/2mv^2, where m is the mass of the object and v is its velocity. It represents the ability of an object to do work by virtue of its motion.Given that the ambulance has 14,600,000 J of energy and is moving at 34 m/s, we can use this formula to find the mass of the ambulance:KE = 1/2mv^214,600,000 J = 1/2m(34 m/s)^2To solve for mass, we can divide both sides of the equation by (1/2)(34 m/s)^2:m = (14,600,000 J) / [(1/2)(34 m/s)^2]m = 14,600,000 J / (1/2)(1156 m^2/s^2)m = 14,600,000 J * (2/1156 m/s^2)m = 16.97 tonSo the mass of the ambulance is approximately 16.97 ton.
To learn more about kinetic energy refer:
brainly.com/question/8101588
#SPJ4
How do you solve a torque problem in physics?
Calculate the angle between the vector connecting the force's application point and the pivot point and the direction of the applied force. You may calculate the torque by multiplying r by F and sin.
How does physics explain torque?The force that can cause an object to revolve around an axis is measured in torque. Torque accelerates an object in an angular direction, much like force does in linear kinematics.
An easy explanation of torqueAn angular force known as a torque tends to produce rotation along an axis, which could be the center of mass or a fixed point. Torque can also be thought of as a thing's capacity in order to overcome turning resistance, such as a shaft or a gear, that is rotating.
To know more about torque visit:-
https://brainly.com/question/14970645
#SPJ4
When the wedges are removed, the cars will move. Predict which direction they will move and when they will stop
Answer: hello your question lacks the required diagram attached below is the required diagram
answer : Both cars will move backwards and stop due to friction.
Explanation:
Given that both cars are negatively charged, When the wedges are removed both cars will move backwards ( repelling each other ) because they are like poles, and Like poles repel each other. while unlike poles attract each other ( forward movement ) .
The cars will later come to a stop due to frictional forces between the cars and the surface.
How do you think the speed a satellite fall towards Earth compares to the speed it is moving forward
The speed a satellite fall towards Earth compares to the speed it is moving forward If the speed drops, it will fall toward the earth.
We can say that satellite speed has a significant impact on satellite motion because if a satellite's speed is reduced by half, it will fall towards the earth because it is drawn in by the earth's gravitational pull. However, if a satellite's speed is doubled, it will travel into space because the earth's gravitational pull will no longer hold it in orbit.
When a satellite is moving quickly, the force of gravity may not be able to hold it in orbit. If it moves slowly, it won't make enough progress to resist gravity's pull and collide with the object it is orbiting.
Rockets are used to put the majority of satellites into orbit. When the pull of Earth's gravity and the satellite's speed are equal, the satellite circled the planet. Without this equilibrium, the satellite would either fall back to Earth or shoot off into space in a straight path.
To learn more about satellite from given link
https://brainly.com/question/20796234
#SPJ4
If you move 50 meters in 10 seconds, what is your specd?
HERE
Answer:
5 meters per second
Explanation:
To find the unit speed, divide the distance, 50 meters, by the time, 10 seconds.
[tex]\frac{50}{10} =5[/tex]
You moved 5 meters per second. We can check this by seeing how far you move at this rate in 10 seconds. Multiply 5 by 10.
[tex]5\cdot 10=50[/tex]
So, your speed is 5 meters per second.
Good luck ^^
PLEASE ANSWER 100 POINTS!!
Juan drives his car around a curve at a speed of 17.0 m/s. Assume the curve can be approximated by an arc of a circle of radius 122.0 m. If a force of 7380 N is required to maintain the car’s circular motion, what is the car’s mass?
In ∑ F = m v^2r , both m and r are unknown but remain constant
What is the centripetal force that allows a car to move around a sharp curve in a roadway?
Any force, or set of forces, can accelerate an object radially or centripetally. A few examples include the tension in a tether ball's rope, the gravitational pull of the Earth on the Moon, the friction between roller skates and a rink's floor, the force of a banked road on a car, and the forces on a centrifuge's tube.
A centripetal force is any net force that produces uniform circular motion. The centripetal force and centripetal acceleration both point in the direction of the centre of curvature. Newton's second equation of motion states that net force equals mass times acceleration, or net F = m a.
The centripetal acceleration—a = a c—determines the rate of acceleration for uniform circular motion.
Consequently, the size of
To be learn more about produces refer to:
https://brainly.com/question/30141735?referrer=searchResults
#SPJ1
Suppose the particles in the preceding problem have masses The velocities of the particles are (a) Calculate the angular momentum of each particle about the origin. (b) What is the total angular momentum of the four-particle system about the origin?
Part A: The angular momentum of each particle about the origin
The angular momentum of the first particle is -0.4 kg.m²/s.The angular momentum of the second particle is 0.The angular momentum of the third particle is 1.3 kg.m²/s.The fourth particle's angular momentum is 0.Part B: The total angular momentum of the four-particle system is 0.95 kg.m²/s.
The expression used to calculate angular momentum L is:
L = r x mv
Here, r is the position vector of the object m is the mass and v is the velocity vector.
According to the superposition principle, the resultant angular momentum due to many particles is the vector sum of the individual angular momentum.
L = L₁ + L₂ + L₃ + ...
Here, L₁ is the angular momentum of a particle, L₂ is the angular momentum of the particle, and so on.
In the question
Mass of a particle = 5.0 kg
vector r = (2.0i - 3.0j) m
vector v = (3.0i) m/s
Part A (seen in the picture for instruction)
For particle 1
The position vector is 2.0j m
Substitute 0.10 kg from m₁, 2.0j from r, and 2.0i m/s for v₁ in the expression of angular momentum
L = r x mv
L₁ = (2.0jm) x [(0.10 kg)( 2.0i m/s)]
L₁ = -4.0 kg.m²/s
The angular momentum for the first particle is -4.0 kg.m²/s.
For particle 2
Position vector is (2.0i - 2.0j) m
Substitute 0.20 kg from m₂, (2.0i - 2.0j) m from r, and (3.0i - 3.0j)m/s for v₂ in the expression of angular momentum
L₂ = (2.0i - 2.0j) m x [ (0.20 kg) (3.0i - 3.0j) m/s]
L₂ = 0
The angular momentum for the second particle is 0
For particle 3
The position vector is (-3.0i + 1.0j) m.
Substitute 0.30 kg from m₃, (-3.0i + 1.0j) m from r, and -5.0j m/s for v₃ in the expression of angular momentum
L₃ = (-3.0i + 1.0j) m x [((-3.0i + 1.0j) m) ( -5.0j m/s)]
L₃ = 1.35 kg.m²/s
The angular momentum for three particles is 1.35 kg.m²/s.
For particle 4
The position vector is 4.01i m.
Substitute 0.40 kg from m₄, 4.0i m from r, and -4.0i m/s for v₄ in the expression of angular momentum
L₄ = (4.0i m) x [(0.40 kg) (-4.0i m/s)
L₄ = 0
The angular momentum for four particles is 0.
Part B
Formula used: L = L₁ + L₂ + L₃ + L₄
The total angular momentum of the four-particle system is calculated as follows:
By superposition principle
L = L₁ + L₂ + L₃ + L₄
L = -4.0 kg.m²/s + 0 + 1.35 kg.m²/s + 0
L = 0.95 kg.m²/s
Hence, the total angular momentum of the four-particle system is 0.95 kg.m²/s.
Your question is incomplete but most probably your full question was:
Suppose the particles in the preceding problem have masses m₁ =0.10 kg, m₂=0.20 kg, m₃ = 0.30 kg, m₄ = 0.40 kg. The velocities of the particel are v₁= 2.0i m/s,v₂= (3.0i - 3.0j) m/s, v₃= - 1.5j m/s, v₄= -4i m/s.
(a) Calculate the angular momentum of each particle about the origin.
(b) What is the total angular momentum of the four-particle system about the origin?
Learn more about angular momentum at https://brainly.com/question/4126751
#SPJ4
Suppose two dinosaurs with masses of 80. 0 kg and 120. 0 kg sat on the middle and the far end, respectively, of a tree branch. The dinosaurs produced a net counterclockwise torque of 9,400N•m about the end of the branch that was attached to the tree. What was the length of the branch?
The dinosaurs produced a net counterclockwise torque of 9,400Nm about the end of the branch that was attached to the tree. The length of the branch is 4.7m.
τ = Σr × F = rmg
where g is the acceleration caused by gravity, m is the mass, and r is the distance.
Torque has a direct relationship with -
1.the object's mass, in m
2. The mass's separation, r, from the location where the torque is being calculated.
Therefore, the torque will change whether we increase or reduce them.
Therefore, increasing mass will result in an increase in torque, but since we must retain the same torque, we must reduce mass's distance from the location of the torque.
As a result, the mass should be moved closer to the location of the torque.
Total Mass = (80 + 120)kg
= 200kg
Torque = 9400N
τ = Σr × F = rmg
τ = 200 × r × 10
9400 = 200 × r × 10
r = 9400 / 2000
r = 4.7m
To learn more about torque from given link
https://brainly.com/question/17019156
#SPJ4
if energy of 10 watts is transferred into a conatiner of helium, how long does it take to vaporize 1 kg of liquid helium
Consider how much energy is required to melt one kilogram of ice at zero degrees to produce one kilogram of water at zero degrees.
The energy required to melt one kilogram of ice is determined by Q = mLf = (1.0 kg)(334 kJ/kg) = 334 kJ using the equation for a change in temperature and the value for water from Table 1. Water is converted from a liquid to a gas by the process of evaporation, which requires a significant amount of energy. The amount of energy needed to cause the state change is known as the latent heat of vaporization. At 1 atmosphere of pressure, the latent heat of vaporization is 539 calories per gram of water.
Learn more about energy here-
https://brainly.com/question/24284560
#SPJ4
What measuring device should you use to determine that the internal potential energy of a substance has changed?
A calorimeter is a device which is used to measure and define the internal energy of a system.
A calorimeter is a device used to measure the heat of chemical processes or physical changes, as well as heat capacity. Among the most frequent varieties are differential scanning calorimeters, isothermal micro calorimeters, titration calorimeters, and accelerated rate calorimeters.
A basic calorimeter is just a thermometer attached to a metal container filled with water that is suspended above a combustion chamber. It is a type of measuring instrument used in the study of thermodynamics, chemistry, and biochemistry.
To calculate the enthalpy change per mole of substance A in a reaction involving two compounds A and B, the substances are individually introduced to a calorimeter and the beginning and final temperatures (before and after the reaction) are recorded.
learn more about calorimeter to visit this link
https://brainly.com/question/4802333
#SPJ4
Does temperature or mass affect thermal energy more?
If the temperature doesn't change but the mass of the object increases, the thermal energy in the object increases.
About Thermal energyThermal energy, which is referred to as heat energy, is produced when there is an increase in temperature. Due to the increase in temperature, the molecules and atoms will move faster. Thermal energy, which is referred to as thermal energy, is generated when there is an increase in temperature. Due to the increase in temperature, the molecules and atoms will move faster.
In fact, they would collide even more quickly. In other words, heat energy can be thought of as a form of energy, which is produced when a substance in which atoms and molecules vibrate at a faster rate, due to an increase in temperature.
How is Thermal Energy GeneratedWith that in mind, you need to understand how thermal energy is produced. That's where you need to dive deeper and look at the definition of thermal energy. In the case of matter, atoms and molecules are moving all the time. When the substance is heated, there will be an increase in temperature. It can force particles to move at a faster speed. As a result, you will be able to see how they meet each other. Heat energy can be said to be a form of energy that comes out of a heated substance.
If a substance is hotter, the science of defining heat energy explains how more particles are moving. As a result, you can also get higher heat energy output.
Learn more about Thermal energy at https://brainly.com/question/18989562.
#SPJ4
It is known that a damped oscillator has a maximum displacment that is 13.5% of the original amplitude after 0.60 s. What is the value of the time constant
The value of the time constant is = 0.2996 s. Due to the fluid's dampening effect, the oscillations' amplitudes reduce. ma=−bv−kx.
How long does it take for the damped oscillations' amplitude to decrease to half of what it was initially?Its amplitude decreases by half after every ten oscillations. Find the starting time at which the amplitude becomes 11000 times as large as it was initially: Q. A damped harmonic oscillator's displacement is determined by the equation x(t)=e01.
How do amplitude and oscillation relate to one another?In an oscillating system, the amplitude is the amount by which the oscillating variable changes with each oscillation. For instance, sound waves in the air oscillate the atmospheric pressure, and the amplitude of each oscillation is proportional to the variation in the pressure.
to know more about time constant visits:
brainly.com/question/13860412
#SPJ4
A lighthouse that rises 49 feet above the surface of the water sits on a rocky cliff that extends 19 feet from the base. A sailor on the deck of a ship sights the top of the lighthouse at an angle of 30.0 degrees about the horizontal.
If the sailor’s eye level is 14 feet above the water, how far is the ship from the rocks?
If the sailor’s eye level is 14 feet above the water, So the ship from the rocks is 41.62 feet far from the sailor.
The main concepts required to solve this problem are the trigonometric properties and the distance. Later, use the tangent function and substitute the values. Finally, rearrange the tangent equation to calculate the distance of the ship from the rocks.
tan30.0°=35ft./19ft.+x
1/√3=35ft./19ft.+x
x=(35ft.) ([Equation]3)-19ft.
=41.62ft.
A tangent equation is an equation that describes a line that touches a given curve at a single point. It is usually expressed in the form y=mx+b, where m is the slope of the line and b is the y-intercept. To find the equation of a tangent, one must calculate the slope of the line at the point of tangency. This can be done by taking the derivative of the equation of the curve at that point.
The derivative will be the slope of the tangent, so this can be substituted into the tangent equation. The y-intercept can be found by plugging the x-coordinate of the point of tangency into the equation of the curve and solving for y. This will give you the y-intercept of the tangent equation. Through this process, one can find the equation of a tangent to any given curve.
To learn more about Tangent equations visit here:
brainly.com/question/29180943
#SPJ4
A tsunami hits northern California at a frequency of 0.25 Hz and a wavelength of 8000 m. What is the speed of the wave?
Answer:
2000 m/s
Explanation:
The speed of a wave is it's frequency * wavelength. In this case, the frequency is 0.25 Hz (waves per second) and the wavelength is 8000m. So the speed of the wave will be 0.25Hz * 8000m which is 2000 meters per second.
A tsunami when hits north California, its speed will be 2000m/s.
What is tsunami?The tsunami caused by the movement of tectonic plates at the sea or ocean floor or due to large volcanic activities . These are high energy waves that can destroy everything.
What is speed?Speed was the pace as well as the direction of an object's movement, whereas speed would be the time rate whereby an object is traveling along a path. In other words, velocity is just a vector, whereas speed would be a scalar value.
In the question, given data is ,
frequency (n) = 0.25 Hz.
Wavelength (λ) = 8000msince
speed of wave (v) = n.λ
on putting values.
v = 0.25×8000 =2000m/s
Hence, the speed of the wave is 2000m/s.
To learn more about tsunami and wave
https://brainly.com/question/14782736
#SPJ2
PLEASE HELP!!
The movement or flow of electrons through a wire is called _____________.
A.Current
B.Voltage
C.Resistance
D .Velocity
1. What is the
momentum of a 1.5 × 103-kilogram car
as it travels at 30. meters per second due east for 60.
seconds?
A) 4.5 x 104 kg m/s, east
B) 4.5 x 104 kg.m/s, west
C) 4.5 x 106 kg•m, east
D) 4.5 x 106 kg•m, west
A 1.5 x 103 kg car's momentum is equal to 4.5 x 104 kg m/s east if it moves at a speed of 30 m/s for 60 seconds while traveling straight east.
What is momentum ?Momentum is a property of an object or system that describes its tendency to move or stay in motion. It is equal to the product of the mass of the object and its velocity. Momentum is conserved, meaning that the total momentum of an isolated system remains constant, regardless of any changes or interactions within the system. Momentum is an important concept in classical mechanics, and is directly related to forces, energy, and angular momentum. Momentum is an essential factor for describing the behavior of objects in motion.
To learn more momentum
https://brainly.com/question/1042017
#SPJ1
Questions and problems 1) Why at the maximum height, the acceleration of projected object does not equal to zero? 2) What is meant by freely fall acceleration is equal to 9.8m/s²? 3) Describe the characteristics of uniform motion 4) Define these terms. a) distance 5) Explain the difference between distance and displacement. b) displacement d) speed d) velocity e) motion f) rest 6) Distinguish between average speed and instantaneous speed. 7) Give reason when an object falls freely from rest increases its velocity. 8) A car has covered a distance of 600 km in 10 hours. What is its average speed? 9) A body moves at speed of 180 km/h. Calculate the distance it covers in a minute. 10) Calculate the average velocity in km/h for an athlete who covered a distance of 4000 m in 30 minutes.
When an item is projected vertically upward, its velocity is assumed to be zero at its highest point, yet it still experiences acceleration from the gravity of 9.8 m/s^2.
What is meant by freely fall acceleration being equal to 9.8m/s²?This means that anything that is drawn toward the center of the earth has a 9.8-meter acceleration per second as it "falls" to the earth. As a result, each second that such a body is dragged towards the earth, its velocity (the speed with direction) increases by around 9.8 meters per second.
Describe the characteristics of uniform motion.The velocity is constant in uniform motion. In terms of time, neither its magnitude nor its direction change.
Explain the difference between distance and displacement.Distance is the length of any path connecting any two places. When measured along the shortest path between any two points, displacement is the direct distance between them. The direction is ignored when calculating distance. The direction is accounted for in the displacement calculation.
To know more about displacement visit:
https://brainly.com/question/321442
#SPJ1
Calculate the power of a light bulb that uses 40J of electricity in 4 seconds.
Answer:
power=work done /time
power=40J/4s
power=10wat
the driver of a 2000 kg car moving at 30 m/s presses on the break pedal. If the braking force is 10000 N, how far does the car travel before stopping
If the braking force is 10000 N, 90 meters is far the car travel before stopping.
What is force ?When an object interacts with another object, it experiences a push or pull known as a force. Every time two objects come into contact, a force is applied to each one of them. Actual forces can only be created by interaction.
What is energy ?The definition of energy is "the ability to do work, which is the capability to apply a force causing the displacement of an object." Despite this vague description, energy simply refers to the power that propels motion.
Given that,
Mass of automobile = 2000 kg
speed = 30 m/s
Braking force = 10000 N
For, The acceleration is
Using newton's formula
Where, f = force
m= mass
a = acceleration
Put the value of F and m into the formula
-10000 = 2000*a
The braking force is visible in the negative sing.
It demonstrates that the force's direction is the inverse of the motion.
a = -10000/2000
a = -5m/s2
For the distance,
Using third equation of motion
[tex]v^{2} - u^{2} = 2as[/tex]
[tex]0- 30^{2} = 2 * (-5) *s[/tex]
s = 90m
Consequently, the automobile went 90 meters before coming to a stop.
Learn more about force from the given link:
https://brainly.com/question/388851
#SPJ4
you work at a Dave's donut shop the shop sells a dozen donuts for 6.99 dollars Dave redesigned the Box used to hold one dozen donuts you have been asked to determine whether the company should use the new box or keep the original box the table shows the dimensional of each box and the cost per square foot of cardboard to make each box box original length in 10 waste in six height in three cost per square foot dollar 0.22 new length in 15 waste it with in 11 ties into cost per square foot dollar 0.15 what is the surface area in square inches of the original box? please help I really need help with my work
Answer:
The original box is 180 Inches², the new box is 330 inches²