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

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

Which of the following statements is $NOT$ true?

What is the total energy for one mole of a solid substance?

How much energy is produced in the burning of $1\, kg$ of coal?

The specific heat capacity of a copper block of mass $M$ is $s$. If the mass of the copper block is doubled,the specific heat capacity will be