There is a small hole in a container. At what temperature should it be maintained in order that it emits one calorie of energy per second per `"meter"^(2)` :-

A small hole is made in a hollow enclosure whose walls are maintained at a temperature of 1000 K. The amount of energy being emitted per square metre per second is :

The temperature of the body is increased from -73^(@)C to 357^(@)C , the ratio of energy emitted per second is

What was the speed of vehicle C on day 2 in terms of meters per second ?

At a given temperature what is the mean energy per degree of freedom of any gas ?

A car moves at the speed of 72 km/hr. What is the speed of the car in meters per second ?

A black body is at a temperature of 527^@C , to radiate twice as much energy per second its temperature must be increased to

A black body is at a temperature of 527^(@)C , to radiate twice as much energy per second its temperature must be increased to

Two spheres have radii 1m , 2m are at same temperatures, have emissivites e 2e then ratio of radiant energy emitted per second is .