Snow is more heat insulating than ice,because

$A$ rod of length $50 \, cm$ has one end at $25^oC$ and the other end at $125^oC$. The temperature gradient is ....... $^oC/cm$.

What is heat transfer? Write its modes. In which mode,medium is not required?

The bottom of a lake is at $0^{\circ} C$ and the atmospheric temperature is $-20^{\circ} C$. If $1 \, cm$ of ice is formed on the surface in $24 \, h$,then the time taken to form the next $1 \, cm$ of ice is ......... $h$.

In the steady state,the temperature of a body ...

The quantity of heat which crosses unit area of a metal plate during conduction depends upon