A massless piston which can move without friction closes a

Last updated: 6/7/2023

A massless piston which can move without friction closes a sample of helium in a vertical thermally insulated cylinder which is closed at its bottom and the cross section of which is A 2dm Above the piston there is a fixed stand to which an unstretched spring of spring constant 2000 N m is attached whose bottom end is at a distance of 2 dm from the piston when the volume of the gas is Vo 8dm The 105 Pa external pressure is po 9 g 10m S The gas confined in the cylinder is heated with an electric heating element 1dm 10 How much heat is supplied by the element till it reaches spring A zero B 600 J C 8000 J 1000I Po www Vo Vo D Id B A Id