Help questions 5&6 about force

Explain in physical terms how a microwave oven works. what would happen when you put a conductor in the microwave oven? explain.

6–48 bananas are to be cooled from 24 to 138c at a rate of 215 kg/h by a refrigeration system. the power input to the refrigerator is 1.4 kw. determine the rate of cooling, in kj/ min, and the cop of the refrigerator. the specific heat of banana above freezing is 3.35 kj/kg·8c.

Aball is thrown horizontally from a cliff at 8m/s .in what direction is the ball moving 2s later?