The efficiency of a Carnot engine is 50%. The temperature of the heat sink is `27^@C`. Find, the temperature of the heat source.

The efficiency of an ideal heat engine is

The efficiency of a Carnot heat engine working between temperatures 127^(@)C and 27^(@)C is

A reversible heat engine converts 1/6 th of heat, which it extracts from source, into work. When the temperature of the sink is reduced by 40^(@)C , its efficiency is doubled. Find the temperature of the source.

If at 0^@C temperature, 80 calorie heat is given to 1g ice then temperature would be _____

Temperature of two liquids are 80^(@)C and 20^(@)C . When they are mixed in the mass ratio of 8:5 , the temperature of the mixture becomes 60^(@)C . Find the ratio of their specific heats.