A student holds a tuning fork ocillating at 2456 Hz. He walks towards a wall at a constant speed of `1.33(m)/(s)`. (a) What beat frequency does the student observes between the tuning fork and its echo? (b) How fast must he walk away from the wall to observe a beat frequency of `5.00Hz`?

Explanation

To solve the problem, we need to calculate the beat frequency observed by the student when he walks towards a wall and then find out how fast he must walk away from the wall to observe a specific beat frequency.

### Step-by-Step Solution:

**Given Data:**
- Frequency of tuning fork, \( f_0 = 2456 \, \text{Hz} \)
- Speed of student, \( v_s = 1.33 \, \text{m/s} \)
- Speed of sound in air, \( v = 343 \, \text{m/s} \) (approximately at room temperature)
...