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Which of the following statements is true for an elastic collision?A. Both momentum and kinetic energy are conserved.B. Momentum is conserved, but kinetic energy is not conserved.C. Kinetic energy is conserved, but momentum is not conserved.D. The amount of momentum lost by one object is the same as the amount gained by the other object.E. The amount of kinetic energy lost by one object is the same as the amount gained by the other object.
A stamp collector is viewing a stamp with a magnifying glass held next to her eye. Her near point is 25 cm from her eye. What is the refractive power of a magnifying glass
A penny of mass 3.10 g rests on a small 20.0-g block supported by a spinning disk
Suzanne observes two light pulses to be emitted from the same location, but separated in time by 2.70 µs. How fast is Mark moving relative to Suzanne
A flywheel is rotating initially with an angular velocity of 3.0 rad/s clockwise. Sometime later it is rotating with an angular velocity of 8.0 rad/s counterclockwise. What is the direction of the angular acceleration
the horizontal and the chair slides along the floor. Using Newton's laws, compute the magnitude of the normal force that the floor exerts on the chair.
How much time is necessary for the torso to come to rest
Imagine that the temperature of a 225 g block of aluminum sitting in the sun increases from 275 K to 300 K
A 3-kg sphere makes and inelastic collinsion with a second sphere initially at rest. What is the mass of the second sphere
Two forces are applied to a car in an effort to move it, as shown in the following figure, where F1 = 422 N and F2 = 372 N. What is the resultant of these two forces
Two very large charged parallel metal plates are 10.0cm apart, How much work has the electric field done on this proton by the time it reaches the positive plate
Estimate the number of drops of water in all the oceans on earth. You will need to use the facts that the oceans cover about 2/3 of the earth's surface and are about 4000 m deep on average
The electric motor of a model train accelerates the train from rest to 0.580 m/s in 33.0 ms. the total mass of the train is 563 g. Find out the average power delivered to the train during its acceleration. The units need to W for the final answer.
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