A source of sonic oscillations with frequency `v_(0)=100Hz` moves at right angles to the wall with a velocity `u=0.17 m//s`. Two stationary receivers `R_(1)` and `R_(2)` are located on a straight line, coinciding with the trajectory of the source , in the following succession :` R_(1)-` source `-R_(2)-` wall. Which receiver registers the beatings and what is the beat frequency ? The velocity of sound is equal to `upsilon= 340 m//s`.

Explanation

To solve the problem, we need to determine the apparent frequencies heard by the two receivers, \( R_1 \) and \( R_2 \), due to the Doppler effect, and then calculate the beat frequency between these two frequencies.

### Step 1: Identify the parameters
- Frequency of the source, \( f_0 = 100 \, \text{Hz} \)
- Velocity of the source, \( u = 0.17 \, \text{m/s} \)
- Velocity of sound, \( v = 340 \, \text{m/s} \)

### Step 2: Calculate the apparent frequency at receiver \( R_1 \)
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