Surface temperature of the sun is of the order of $K$.

$A$ hot and a cold body are kept in a vacuum,separated from each other. Which of the following causes a decrease in the temperature of the hot body?

For a perfectly black body,the coefficient of emission (emissivity) is:

The rate of emission of a body doubles when its temperature is increased by $10^{\circ}C$. If the temperature of the body is increased from $10^{\circ}C$ to $100^{\circ}C$,the rate of emission increases by a factor of:

$A$ thermos flask is polished well.

When $p$ calories of heat is given to a body,it absorbs $q$ calories; then the absorption power of the body will be