If a body at `27^(@)C` emits `0.3` watt of heat then at `627^(@)C`, it will emit heat equal to -

Does a body at 0^(@) C radiate any heat ?

A heat engine absorbs 300J of heat at 627^(@)C and rejects a part of it at 27^(@)C . Find the work done by the engine.

A black body initially at 27^(@) C is heated to 327^(@) C. How many times is the total radiation emitted at the higher temperature than that emitted at the lower temperature ? What is the wavelength of the maximum energy radiation at the higher temperature ? Wien's constant = 2.898xx10^(-3) mK.

A carnot engine takes in 1000 K cal of heat from a reservoir at 627^(@)C and exhausts heat to sink at 27^(@)C . What is its efficiency? What is useful work done//cycle by the engine.

A carnot engine takes in 1000 K cal of heat from a reservoir at 627^(@)C and exhausts heat to sink at 27^(@)C . What is its efficiency? What is useful work done//cycle by the engine.

A black body initially at 27^(@)C is heated to 327^(@)C is heated to 327^(@)C . How many times is total heat emitted at the higher temperature than emitted at lower temperature ? What is the wavelength of the maximum energy radiation at the higher temperature ? Wien's constant = 2.898 xx 10^(-3) mK .

If a black body emits 0.5 joules of energy per second when it is at 27^(@) C , then the amount of energy emitted by it it when it is at 627^(@)C will be

A Cannot engine takes heat from a reservoir at 627^(@)C and rejects heat to sink at 27^(@)C . Its efficiency will be

A black body A at a temperature of 527^(@)C , emits radiant energy at the rate of 16 watt. Another black body B at temperature 127^(@)C , emits radiant energy at the rate 8 watt in the same surrounding. Compare the surface areas of A and B.