Helonafi Helonafi

29-06-2020
Physics

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plz help.....A student heard the echo of her voice from nearby solid object after 2 sec. how far away is the solid object? The speed of sound in air is 340m/s.

A. 170m

B. 340m

C. 510m

D. 680m

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Аноним Аноним

29-06-2020

Answer:

B.

340meters per second x 2 seconds = 680 meters away

divided by 2coming back = 340

Hope this helps

Explanation:

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