## Can the frictional electricity produced during landing of a plane be used for constructive purposes?

As we know that in aeroplane during landing the charged produced in it due to the friction with ground are earthed through its wheels; can this charge be stored with the help of a capacitor and used

## Doubts on electric field lines and flux

Q1.Is the number of electric feild lines due to a charge DEFINITE?
Q2.If it is infinite, then the electric flux due to a charge should be infinite(flux gives the num. Of elctric feild lines passing

## What is the mechanical energy of a bird on top of a moving Ship?

A bird is at rest on d top of a stick of moving ship….!! what is the mechanical energy that exists in the bird ???” – This question was posted by Fatima Answer: The mechanical energy of the bird is both Potential and Kinetic as the bird is at a height with respect to ground ...Read the full post

## A bullet of mass 20g enters into a fixed block with aspeed 40m/s and stops in it. find the change in internal energy during the process.

A bullet of mass 20 g enters into a fixed block with a speed 40m/s and stops in it.
find the change in internal energy during the process?

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## Differences between mass and charge

1. Charge is of two types, mass is only of one kind
2. There are two types of forces (attraction and repulsion) between charges, but there is only one kind