$4200\, J$ of work is required for:

The thermal capacity of $40\, g$ of aluminium (specific heat $= 0.2\, cal/g/^{\circ}C$) is ........ $cal/^{\circ}C$.

Draw a graph of the variation of specific heat capacity of water with temperature and define calorie.

Define specific heat capacity and write its $SI$ unit.

On which factor does the required amount of heat depend to increase the temperature of a substance?

The specific heat $C$ of a solid at low temperature shows temperature dependence according to the relation $C = D T^{3}$, where $D$ is a constant and $T$ is the temperature in Kelvin. $A$ piece of this solid of mass $m \ kg$ is taken and its temperature is raised from $20 \ K$ to $30 \ K$. The amount of heat required in the process in energy units is