A long cylindrical pipe of radius 20 cm is closed at its upper end and has an airtight piston of
Channel: Doubtnut
Date: 2020-08-30

A long cylindrical pipe of radius 20 cm is closed at its upper end and has an airtight piston of negligible mass as shown. When a 50 Kg mass is attached to the other end of the pistion, it moves down. If the air in the enclosure is cooled from temperature T to `T – DeltaT`, the piston moves back to its original position. Then `DeltaT//T` is close to (Assuming air to be an ideal gas, `g = 10 m//s^(2)`, atmospheric pressure is `10_(5)`  Pascal) img src="https://d10lpgp6xz60nq.cloudfront.net/physics_images/KVPY_CP_XI_P1_2017_PHY_E01_015_Q01.png" width="80%"