1. 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.

Which of the following correctly describes what happens when an atomic bomb explodes? small pieces of fissionable material are joined and form a body with a mass greater than the critical mass, the relative number of neutrons escaping decreases, and a chain reaction and explosion result. large pieces of fissionable matter are brought together quickly and form a body with a mass smaller than the critical mass, the relative number of escaping neutrons increases, and a chain reaction and explosion result.