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

Is the specific heat of water and ice the same? Give their values.

$50\,g$ of copper is heated to increase its temperature by $10\,^{\circ}C$. If the same quantity of heat is given to $10\,g$ of water,the rise in its temperature is ........ $^{\circ}C$. (Specific heat of copper $= 420\,J\,kg^{-1}\,^{\circ}C^{-1}$,Specific heat of water $= 4200\,J\,kg^{-1}\,^{\circ}C^{-1}$)

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

Write the old and new definition of calorie.

In engines,water is used as a coolant because ......