A table is revolving on its axis at $5$ revolutions per second. A sound source of frequency $1000 Hz$ is fixed on the table at $70 cm$ from the axis. The minimum frequency heard by a listener standing at a distance from the table will be .... $Hz$ (speed of sound $= 352 m/s$)
Medium
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(c) For source $v_S = r\omega = 0.70 \times 2\pi \times 5 = 22\,m/sec$
Minimum frequency is heard when the source is receding the man. It is given by
${n_{\min }} = n\frac{v}{{v + {v_s}}}$
= $1000 \times \frac{{352}}{{352 + 22}} = 941 Hz$
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