A body having `110 and70^(@)C` temperatures of surrounding and of itself repectively . What would be the value of coefficient of performance ?

If the temperature of the interior of a refrigerator is 7^@C and the temperature of surroundings is 27^@C , What should be the coefficient of performance of the refrigerator working between these temperature ?

The temperature of a body is increased by 72^(@)F. What would be the increase in ""^(@)C ?

A body cols at the rate of 0.5^@C/s when it is at a temperature of 50^@C above the surroundings. What would be the rate of cooling when the body is at a temperature of 30^@C above the surroundings.

In a mechanical refrigerator the low -temperature coils are at a temperature of -13^(@)C and the compressed gas in the condenser at a temperature 27^(@)C . What is the theoretical coefficient of performance.

A body cools from 70^(@)C to 50^(@)C in 6 minutes when the temperature of the surrounding is 30^(@)C . What will be the temperature of the body after further 12 minutes if coolilng proseeds ac cording to Newton's law of cooling ?

A body cools from 70^(@)C to 50^(@)C in 5 minutes. Temperature of surroundings is 20^(@)C . Its temperature after next 10 minutes is

A body cools from 70^(@)C to 50^(@)C in 5minutes Temperature of surroundings is 20^(@)C Its temperature after next 10 minutes is .

A body cools from 50^@C " to " 40^@C in 5 min. If the temperature of the surrounding is 20^@C , the temperature of the body after the next 5 min would be

A body cools from 50^@C " to " 40^@C in 5 min. If the temperature of the surrounding is 20^@C , the temperature of the body after the next 5 min would be