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28-04-2016
Physics

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A Cannon makes a noise, and it's echo is heard 4.5 seconds later. if sound travels at 343 m/s:

a.) how far did the sound travel?

b.) how far away is the surface it reflected off of?

Respuesta :

28-04-2016

a). (343 m/s) x (4.5 sec) = 1,543.5 meters

b). The surface it reflected from is (1543.5 / 2) = 771.75 meters away.

The sound had to go there AND come back before you heard the echo.

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