F.5 Physics Homework
2009-12-19 8:29 pm
Two men stand a distance apart beside a long metal fence on a still day. One man places his ear against the fence while the other gives the fence a sharp knock with a hammer. Two sounds, separated by a time interval of 0.5s, are heard by the first man. If the velocity of sound in air is 330 m/s and in the metal 5280 m/s, how far apart are the men?
回答 (1)
2009-12-19 8:47 pm
✔ 最佳答案
Let the separation between two men be d.Time required for sound to travel in air = d/330
Time required for sound to travel in metal = d/5280
So, d/330 - d/5280 = 0.5
Solving for d,
d = 176 m
參考: Physics king
收錄日期: 2021-04-19 20:56:20
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