A pole-vaulter first converts kinetic energy into

a.

thermal energy.

b.

chemical energy.

c.

mechanical energy.

d.

elastic potential energy.

Calculate the change in momentum of a 10kg object that has an initial speed of 15m/s and slows to 8 m/s. If this change occurs over a time of 3s, what force caused the change?

A cat lies on the floor. can you say that no force acts on the cat? or is it correct to say that no net force acts on the cat? explain.

We are given the description of an enclosure that has fencing on 3 sides and can use 3,056 yards of fencing. We are to find the dimensions that will maximize the area contained within the fence. A rectangle formed along a straight portion of a river.

Identify a wave that speeds up when it passes from air to water as well as one that slows down

A piece of aluminium foil is held between a bar magnet and a paperclip. What will happen to the paper clip?

A laboratory dish, 20 cm in diameter, is half filled with water. One at a time, 0.50/µL drops of oil from a micropipette are dropped onto the surface of the water, where they spread out into a uniform thin film.

The process that converts liquid to gas is melting true or false

A balloon was partially filled with helium gas at room temperature. It occupied 4.0 liters of volume at 700.0 mm Hg atmospheric pressure. When the balloon was released, it traveled upward until it burst at 99 mm Hg atmospheric pressure.

A packing crate rests on a horizontal surface. It is acted on by three horizontal forces: 600 N to the left, 200 N to the right, and friction. The weight of the crate is 400 N.

Which type of radiation has the lowest penetrating ability?