The efficiency of a Carnot cycle is `1/6` . If on reducing the temperature of the sink by `65^@C`, the efficiency becomes `1/3` , find the initial and final temperatures between which the cycle is working.

Efficiency of a Carnot cycle is 75% .If temperature of the hot reservoir is 727^@C , calculate the temperature of the cold reservoir.

An engine has an efficiency of 1/6 . When the temperature of sink is reduced by 62^(@)C , its efficiency is doubled. Temperature of the source is

A reversible engine converts one third input into work. When the temperature of the sink is reduced by 62 °C, then efficiency of the engine is tripled. The temperature of the source and sink are

The efficiency of a Carnot engine which operates between the two temperatures T_1=500K and T_2=300K is

A reversible engine converts one fifth of heat which it absorbs from source into work. When the temperature of the sink is reduced by 70^@ , its efficiency is doubled. Calculate the temperature of the source and the sink .

The pressure of a gas in a closed vessel is increased by 0.4%, if the temperature of the gas is increased by 1^@C , the initial temperature of the gas is

An ideal heat engine working between temperature T_(1) and T_(2) has an efficiency eta , the new efficiency if both the source and sink temperature are doubled, will be

If temperature of water increases for 1^@C to 3^@C the density of water_____

A Carnot engine, whose efficiency is 40% , takes in heat from a source maintained at a temperature of 500K. It is desired to have an engine of efficiency 60% . Then, the intake temperature for the same exhaust (sink) temperature must be: