A 0. 25 kg baseball is in contact with a bat for 0. 0075 s and exerts a force of 18,500 N. What impulse is delivered to the ball? 33 kg • 140 kg • 4600 kg • 74,000 kg •.

Acompound machine is also called a machine. a. force b. simple c. complex d. directional

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.

Aspring that is stretched 2.6 cm stores a potential energy of 0.053 j. what is the spring constant of this spring?