The velocities of the longitudinal and transverse waves produced by an earthquake are 5km per second and 9km per second respectively. A seismograph records the arrival of the transverse waves 64 seconds before of the longitudial waves. How far away was the earthquake?
Ans:720km
Please teach me with explanation.Thank you!
physics
2010-08-21 7:12 am
回答 (1)
2010-08-21 8:13 am
✔ 最佳答案
Let d be the distance from the seismograph where the earthquake happened.Time for the longitudinal wave to arrive the seismograph = d/5
Time for the transverse wave to arrive the seismograph = d/9
Hence, d/5 - d/9 = 64
solve for d gives d = 720 km
收錄日期: 2021-04-13 17:27:38
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