Physics question about velocity and distance
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Physics question about velocity and distance

[From: ] [author: ] [Date: 11-09-15] [Hit: ]
waves 48.waves.How far away was the earthquake?I would really appreciate it if someone could show me how they got the answer. Thank you so much!-dV = 9.......
Hi! I have homework and although I understand most of it, I don't understand how to solve this question:
The velocity of the transverse waves produced
by an earthquake is 5.11 km/s, while that of
the longitudinal waves is 9.4024 km/s. A seis-
mograph records the arrival of the transverse
waves 48.6 s after that of the longitudinal
waves.
How far away was the earthquake?
Answer in units of km

I would really appreciate it if someone could show me how they got the answer. Thank you so much!

-
dV = 9.4024 - 5.11 = 4.2924 km/s

D = dV*dt = 4.2924*48.6 = 208.61 km
____________________________________

t = D/u + D/v = 66/330 + 66/v = 1.77143

v = 42 m/s
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