The classical method of a hydrogen atom in its normal, unexcited configuration has an electron that revolves around a proton at a distance of `5.3 xx 10^(11)m`.
(a) What is the electric potential due to the proton at the position of electron ?
(b) Determine the electrostatic potential energy between the two particles.

Explanation

To solve the problem step by step, we will break it down into two parts as stated in the question.

### Part (a): Electric Potential Due to the Proton at the Position of the Electron

1. **Identify the formula for electric potential (V)**:
The electric potential \( V \) due to a point charge is given by the formula:
\[
V = \frac{K \cdot Q}{r}
...