Question

A spherical balloon of 1 m diameter contains a gas at 200 kPa and 300 K. The gas inside
the balloon is heated until pressure becomes 500 kPa. During the process of heating,
pressure of gas inside the balloon is proportional to its diameter. Determine the work
done on or by the balloon.

Answer 1

1/ Magnets have north pole and south pole

/Magnetic field is always from north to south .

3/ You can use magnet as electromagnet and MRI and also for levitating with superconductors .Magnets are very useful in Motors, ac generator and dc generator and it is well known for bullet  . In this procress trains levitate due to electromagnets placed in the train’s down part and at the runner's part.

4/If you will go on google and type magnet then lots of page will be opened. Magnets play a key role in our life.

5/Magnets are very powerful due to material used in them.

BE YOURS.........^_^

Answer 2

Answer: 2996.91KW

Explanation: It is polytropic process.