A stream engine delivers `5.4xx10^(8)J` of work per minute and absorbs `3.6xx10^(9)J` of heat per minute from its boiler. What is the efficiency of the engine? How much heat is wasted per minute?

During a cyclic process, a heat engine absorbs 500 J of heat from a hot reservoir, does work and ejects an amount of heat 300 J into the surroundings (cold reservoir). Calculate the efficiency of the heat engine?

A steam engine intakes 100 g of steam at 100^(o)C per minute and cools it down to 20^(o)C . Calculate the heat rejected by the steam engine per minute. Latent heat of vaporization of steam =540 cal g^(-1) .

An ideal gas heat engine is operating between 227°C and 127°C. It absorbs 10^4 J of heat at the higher temperature. The amount of heat converted into work is ______ J .

A Carnot engine working between 300 K and 600 K has an output of 800 J / cycle. What is the amount of heat energy supplied to the engine from source per cycle.

A perfect gas goes from state A to state B by absorbing 8xx10^(5)J of heat and doing 6.5xx10^(5)J of external work. It is now transferred between the same two states in another process in which it absorbs 10^(5)J of heat. In second process. Find the work done in the second process.

One end of a metal rod of length 1.0 m and area of cross section 100cm^2 is maintained at 100° C. If the other end of the rod is maintained at 0°C, the quantity of heat transmitted through the rod per minute is (Coefficient of thermal conductivity of material of rod =100 W/m-K)

Monochromatic light of frequency 6.0xx10^(14)Hz is produced by a laser. The power emitted is 2.0xx10^(-3) W. (a). What is the energy of a photon in the light beam? (b) How many photons per second, on an average are emitted by the source?