OnlyWunTasi
06.05.2021 •
Physics
Sophie is trying to measure the speed of sound. She stands 24.0m away from a wall and claps repeatedly, changing the frequency until the echo synchronised with her claps.
If she calculates the speed of sound as 325m.s-1 how long did she wait between claps?
Give your answer in seconds, without units and correct to three significant figures.
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Ответ:
Power, P = 3800 watts
Explanation:
It is given that,
Work done by lawnmower, W = 4,560,000 J
Time, t = 20 min = 1200 sec
We have to find the power output of the engine. It is given by :
P = 3800 watts
Hence, the power output of the engine is 3800 watts.