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Take the speed of sound to be 340 m/s. A...

Take the speed of sound to be 340 m/s. A thunder clap is heard about 3 s after the lightning is seen. The source of both light and sound is

A

moving overhead faster than the speed of sound.

B

emitting a much higher frequency than is heard.

C

emitting a much lower frequency than is heard

D

about 1000 m away

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The correct Answer is:
D
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