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- A person speaking normally produces a sound intensity of 40 dB at a di...
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- A statinary observer receives a sound of frequency 2000 Hz. The variat...
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- A source of sound of frequency f1 is placed on the ground. A detector ...
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- A sound wave of frequency f travels horizontally to the right . It is ...
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- A man is watching two trains, one leaving and the other coming in with...
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- The intensity of a sound wave gets reduced by 20% on passing through a...
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