A refrigerator is to maintain eatables kept inside at `9^(@)C`. If room temperature is `36^(@)C`, calculate the coefficient of performance.

A refrigerator is used to mainatain eatables kept inside it at 9^(@)C . If the room temperature is 35^(@)C , then calculate the coefficient to performance. Calculate the amount of heat rejected to the surrounding.

A heating element using nichrome connected to a 230V supply draws an initial current of 3.2A which settles after a few seconds to a steady value of 2.8A. What is the steady temperature of the heating -element, if the room temperature is 27.0^(@) C? Temperature cofficient of resistance of nichrome averaged over the temperature range involved is 1.70xx 10^(-4@)C^(-1).

Which of the following alkali metal is expected to melt if the room temperature rises to 30^(@)C ?

Ge and Cu are cooled from room temperature to -200^@C , effect on their resistivity is

In countries like USA and Canada, temperature is measured in fahrenheit, whereas in countries like India, it is measured in celsius. Here is a linear equation that converts fahrenheit to celsius. F=(9/5)C+32 . If the temperature is 30^(@) C, what is the tempetature in fahrenheit?

A refrigerator is driven by a 1HP motor having an efficiency of 80%. The refrigerator works between 0^(@)C and 38^(@)C . Calculate the time required by the refrigerator to freeze 1 litre of water, heat of fusion of ice is 2.26xx10^(5)Jkg^(-1) .

In countries like USA and Canada, temperature is measured in fahrenheit, whereas in countries like India, it is measured in celsius. Here is a linear equation that converts fahrenheit to celsius. F=(9/5)C+32 . If the temperature if 0^(@)C , what is the temperature in fahrenheit and if the temperature is 0^(@)F , what is the temperature in celsius?