3 years ago

A student is standing 8 m from a roaring truck engine that is measured at 20 dB. The student moves 4 m closer to

Physics

1 answer:

Ipatiy [6.2K]3 years ago

5 0

Answer:80 dB

Explanation:

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When there is wind it takes longer

Explanation:

With no wind, the round trip time is

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When we have a constant wind speed w

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comparing the reciprocal times;

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Answer:

Explanation:

base of triangular frame, b = 90 cm

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Let the height is h.

Area of a triangular frame = 1/2 x base x height

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