What do chefs change with many dishes they serve

Which of the following is an example of units for speed

A2k pendulum has a speed of 1 m/s at a height of 1/2 meter

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.