A source \( (S) \) emitting sound of frequency \( f_{0}=960 \mathrm{~Hz} \) is projected with ve...

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A source \( (S) \) emitting sound of frequency \( f_{0}=960 \mathrm{~Hz} \) is projected with velocity \( 10 \sqrt{2} \mathrm{~ms}^{-1} \) at an angle \( \theta=45^{\circ} \) with the horizontal. Simultaneously, a detector \( (O) \) is projected vertically upwards
P with a speed \( 10 \mathrm{~ms}^{-1} \). There is no wind and speed of sound in air is \( 310 \mathrm{~ms}^{-1} \). After the source and detector fall to the ground, they come to rest. (Take, \( g=10 \mathrm{~ms}^{-2} \) )
The maximum apparent frequency received by the detector is equal to
(a) \( 992 \mathrm{~Hz} \)
(b) \( 952 \mathrm{~Hz} \)
(c) \( 682 \mathrm{~Hz} \)
(d) \( 930 \mathrm{~Hz} \)
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