Discuss the changes in potential energy, kinetic energy, and total energy for a skateboarder going up and down on a half-pipe (u-shaped) ramp. specifically address the energies when the skater is at the highest point (a), half-way down the ramp (b), and at the lowest point (c).

Ababy stroller is a rest on top of a hill which is 10 m high. the stroller and baby have a mass of 20 kg. what is the potential energy of the baby and stroller?

Because air contracts as it cools, the air pressure inside a freezer is typically lower than on the outside. why do ice cubes inside a freezer tend to shrink over time? a. the ice dissolves oxygen from the air, forming a denser crystalline matrix.b. the ice reacts chemically with carbon dioxide in the air, forming gaseous carbon compounds.c. the ice melts, and then the liquid freezes as ice crystals on the bottom of the freezer.d. the ice sublimes, and then the water vapor deposits as ice crystals on the sides of the freezer.

If jerome is swinging on a rope and transferring energy from gravitational potential energy to kinetic energy, is being done.