The average velocity of gas molecules is `400 m s^(-1)`. Calculate their `rms` velocity at the same temperature.

Explanation

To solve the problem of calculating the root mean square (RMS) velocity of gas molecules given their average velocity, we can follow these steps:

### Step-by-Step Solution:

1. **Identify Given Values**:
- Average velocity of gas molecules, \( V_{\text{avg}} = 400 \, \text{m/s} \).

2. **Recall the Formulas**:
...