Physics - Heat & Thermo Question with Solution | TestHub

A piston encloses a gas in a cylinder of radius 4 cm at 1 atm ($10^5$ N/$m^2$) and 300 K. The piston just starts to slide when the gas reaches 600 K. The friction coefficient is 0.25. Find the normal force per unit length of circumference between piston and wall, in units of $10^4$ N/m (two decimals). Atmospheric pressure is $10^5$ N/$m^2$ outside.