An 11.5 g bullet is moving to the right with speed 300 m/s when it hits a target and travels an additional 21.0 cm into the target. What are the magnitude (in N) and direction of the stopping force acting on the bullet?

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.