Write the kinetic gas equation and express it as `P = (2)/(3) E`, where E is the kinetic energy per unit volume.

Explanation

To solve the problem, we need to derive the kinetic gas equation and express it in the form \( P = \frac{2}{3} E \), where \( E \) is the kinetic energy per unit volume.

### Step-by-Step Solution:

1. **Write the Kinetic Gas Equation**:
The kinetic gas equation is given by:
\[
PV = \frac{1}{3} m u^2
...