A vibrating tuning fork tied to the end of a string 1.988 m long is whirled round a circle. If it makes two revolutions in a second, calculate the ratio of the frequencies of the highest and the lowest notes heard by an observer situated in the plane of the tuning fork. Valocity of sound is 350 m/s.

Explanation

To solve the problem of finding the ratio of the frequencies of the highest and lowest notes heard by an observer situated in the plane of a vibrating tuning fork being whirled in a circle, we can follow these steps:

### Step 1: Determine the Velocity of the Source
The tuning fork is tied to a string of length \( L = 1.988 \, \text{m} \) and makes \( 2 \) revolutions per second.

The distance traveled in one revolution is the circumference of the circle:
\[
\text{Circumference} = 2\pi L = 2\pi \times 1.988 \, \text{m}
...