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Svetllana [295]
2 years ago
13

If a car averages 40 mph for 6 hours and then speeds up to average 50 mph for 3 hours

Physics
1 answer:
Otrada [13]2 years ago
3 0

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A listener increases his distance from a sound source by a factor of 4.49.
noname [10]

Answer: Δβ (dB) = -13.1dB

Explanation:

The intensity of sound is inversely proportional to the square of the distance between them.

I ∝ 1/r²

I₁/I₂= r₂²/r₁² .....1

When the listener increases his distance from the source by a factor of 4.49.

Then,

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