Air Pressure Experiment On CD With Balloon #EasyScienceExperiment #Short

Show that air has pressure with the help of an experiment.

Two balloons are filled one with pure He gas and the other with air respectively. If the pressure and temperature of these balloons are same, then the number of molecules per unit volume is

An inflated balloon full of air goes down slowly (becomes smaller and smaller slowly) even though the knot at the mouth of the balloon is airtight. And after a week all the air has escaped from the balloon. Explain how the air particles got out of the balloon.

The hot air balloon rises because it is

A balloon is 1m in diameter and contain air at 25^(@)C and 1 bar pressure. It is filled with air isothermally and reversibly until the pressure reaches 5bar. Assume pressure is propotional to diameter of ballon. Calulate work done by air (atm ,m^(3))