A gas-gun has a cylindrical bore made in an insulating material. Length of the bore is L. A small
Channel: Doubtnut
Date: 2020-02-16

A gas-gun has a cylindrical bore made in an insulating material. Length of the bore is L. A small bullet having mass m just fits inside the bore and can move frictionlessly inside it. Initially n moles of helium gas is filled in the bore to a length `L_(0)`. The bullet does not allow the gas to leak and the bullet itself is kept at rest by a stopper S. The gas is at temperature `T_(0)`. The gun fires if the stopper S is removed suddenly. Neglect atmospheric pressure in your calculations [Think that the gun is in space]. (a) Calculate the speed with which the bullet is ejected from the gun. (b) Find the maximum possible speed that can be imparted to the bullet by using n moles of helium at temperature `T_(0)`.