PDF chapter test TRY NOW
Analyze the question carefully and give the right answer:
1.
A whistle is giving out a sound of frequency \(450\) \(Hz\), approaches a stationary observer at a speed of \(33\) \(m/s\). The frequency heard by the observer is (speed of sound \(=\) \(330\) \(m/s\)).
2. Sound can travel through solids, gases, liquids and even vacuum.
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