A rocket is moving at a speed of \( 200 \mathrm{~m} \mathrm{~s}^{-1...

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A rocket is moving at a speed of \( 200 \mathrm{~m} \mathrm{~s}^{-1} \) towards a stationary target. vvnue moving, it emits a souna wave or frequency \( 1,000 \mathrm{~Hz} \). Some of the sound reaching the target gets reflected back to the rocket as an echo. Calculate (a) the frequency of the sound waves as detected by a
detector attached to the target and \( (b) \) the frequency of the
echo as detected by a detector attached to the rocket. Given, speed of sound \( =330 \mathrm{~m} \mathrm{~s}^{-1} \).
\( \mathrm{P} \)
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