The m.e.p. of a petrol engine first increases as the fuel air ratio is increased and then decreases on further increase in fuel air ratio. The M.E.P is maximum in the zone of________?

Heat flowing from one side to other depends directly on ________?

Maximum energy loss in a boiler occurs due to ________?

A body floats in stable equilibrium ________?

Thermal conductivity of solid metals with rise in temperature normally________?

A hydraulic press has a ram of 15 cm diameter and plunger of 1.5 cm. It is required to lift a weight of 1 tonne. The force required on plunger is equal to________?