A skydiver dives from an airplane. The amount of air resistance she is met with is measured at each second following her jump.

How is sound energy produced a. vibrating objects b. objects being heated c. temperature differences d. stationary objects

Arigid tank is divided into two equal parts by a partition. one part of the tank contains 3 kg of compressed liquid water at 400 kpa and 60°c while the other part is evacuated. the partition is now removed, and the water expands to fill the entire tank. determine the entropy change of water during this process, if the final pressure in the tank is 40 kpa. use steam tables.

Abowling ball rolling down the lane toward the pins has gravitational potential energy. a. no b. a lot of c. a little