A steam engine delivers `5.4×10^(8)J` of work per minute and services `3.6 × 10^(9)J` of heat per minute from its boiler. What is the efficiency of the engine? How much heat is wasted per minute?

A steam engine delivers 5.4 xx 10^(8)J of work per minute and services 3.6 xx 10^(9) J of heat per minute from its boiler. What is the efficiency of the engine? How much heat is wasted per minute?

A pump can raise 100 L of water per minute to a height of 10 m . What should be the power of the pump ?

A pump lifts 5000kg of water per minute through a height of 12m. Find the power of the engine if 30 % of energy is wasted.

A fire engine raises 6 kL of water per minute to a height of 2m and ejects it at 9.2m*s^(-1) . Find the power of the engine. Given mass of 1L of water is 1 kg.

To verify the cash balance, the auditor of Jaya Bank Ltd. Employs his assistant to count cash in hand of Rs. 4500. At first he counts @ Rs. 150 per minute for 10 minutes only, at the end of which time he begins to count @ Rs.2 less every minute than he did in the previous minute. Ascertain how much time he will take to count Rs. 4500 ?

The mass of air striking the blades of a windmill every second is 400 kg . The velocity of the wind is 20 m*s^-1 . What is the rate of storage of energy in the windmill (in kW unit)? How much water can be raised per second , up to a height of 5m, using the windmill? g=10 m*s^(-2) .

A geyser heats water flowing at the rate of 3.0 litres per minute from 27^(@)C to 77^(@)C . If the geyser operates on a gas burner, what is the rate of consumption of the fuel if its heat of combination is 4.0 xx 10^(4) J cdot g^(-1) ?