Question

what is E-charge ? and difine friction​

Answer 1

Explanation:

The elementary charge, usually denoted by e or sometimes q e, is the electric charge carried by a single proton or, equivalently, the magnitude of the negative electric charge carried by a single electron, which has charge −1 e . This elementary charge is a fundamental physical constant.

Friction is the resistance to motion of one object moving relative to another. It is not a fundamental force, like gravity or electromagnetism. Instead, scientists believe it is the result of the electromagnetic attraction between charged particles in two touching surfaces.

Answer 2

The elementary charge, usually denoted by e or sometimes qₑ, is the electric charge carried by a single proton or, equivalently, the magnitude of the negative electric charge carried by a single electron, which has charge −1 e. This elementary charge is a fundamental physical constant. Wikipedia