Can anyone answer this? 60°C water is pumped from a tank. What is the maximum height that the pump can be installed? The friction loss in the suction line is 2.2 J/kg. The vapour pressure of 60°C water is 19.93 kN/m2. The NPSHR of the pump is 4.0 m.

Arailroad car collides with and sticks to an identical railroad car that is initially at rest. after the collision, the total kinetic energy of the two cars is a) the same as before. b) half as much as before. c) one third as much as before. d) one fourth as much as before. e) twice as much as before.