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jekas [21]
3 years ago
9

I shoot a bullet up at 270 m/s. How long does it fly for????

Physics
1 answer:
IrinaVladis [17]3 years ago
4 0

Answer:

5 minutes

Explanation:

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A radar receiver indicates that a pulse return as an echo in 20 μs after it was sent. The reflecting object would be 3000 m away .

Phenomenon of hearing back our own sound is called an echo. It is due to successive reflection of sound waves from the surfaces or obstacles of large size. To hear an echo, there must be a time gap of 0.1 second in original sound and the reflected sound.

Given

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