(b) a person fires a gun in front of a building 167m away. if the speed of sound is 334 ms-1 calculate the time to her to hear an echo?
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Answered by
4
Answer:
d = 167
Soundwave needs to travel 167m to the building and back for echo to be heard.
∴ 2d = 167 × 2 m = 334m
Speed of sound = 334 ms-1 t
so, to travel 334m it will take:
time = dist/vel. = 334m/334ms-1 = 1 second
hope that clears!
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Answered by
2
Answer:
speed = 334 m/s , distance = 167m
speed = distance / time
time = distance / speed
time = 167 / 334
time = 0.5
time taken by sound to reach the surface= time taken by sound to reach the object
time = 2 × 0.5
time = 1s
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