An ideal gas at pressure ${10}^5$  Pa and volume 1 $m^3$ is enclosed by a piston in a cylinder. We start to move the piston outwards at a constant velocity of 1 cm/s. The cross–sectional area of the piston is 0.1  $m^2$. While the piston is moving, we can deliver heat to the gas through a heating filament. What is the heating power (in W) at time $t={10}^3$  sec if we keep the temperature of the gas constant? (Apart from the heat transfer between the gas and the heating filament all other heat exchange can be neglected.
 If your answer is N give value of $\frac{N}{10}$ .