Physics Help question earthquakes tsunami?
David asked:
An earthquake on the ocean floor in the
Gulf of Alaska induces a tsunami (some-
times called a “tidal wave”) that reaches Hilo,
Hawaii, 4280 km away, after a time of 9.71 h.
Tsunami’s have enormous wavelengths (100-
200 km), and for such waves the propagation
speed is
v qg d ,
where d is the average depth of the water, d is
in meters, v is in m/s, and g = 9.8 m/s2.
From the information given, find the aver-
age ocean depth between Alaska and Hawaii.
(This method was used in 1856 to estimate
the average depth of the Pacific Ocean long
before soundings were made to give a direct
determination.) Answer in units of km.
that didnt work
. the equation for the depth of the ocean is V= sqrt(gd).
its hard to see that in the question.
v=velocity
g=gravity 9.81
d=average depth of ocean
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An earthquake on the ocean floor in the
Gulf of Alaska induces a tsunami (some-
times called a “tidal wave”) that reaches Hilo,
Hawaii, 4280 km away, after a time of 9.71 h.
Tsunami’s have enormous wavelengths (100-
200 km), and for such waves the propagation
speed is
v qg d ,
where d is the average depth of the water, d is
in meters, v is in m/s, and g = 9.8 m/s2.
From the information given, find the aver-
age ocean depth between Alaska and Hawaii.
(This method was used in 1856 to estimate
the average depth of the Pacific Ocean long
before soundings were made to give a direct
determination.) Answer in units of km.
that didnt work
. the equation for the depth of the ocean is V= sqrt(gd).its hard to see that in the question.
v=velocity
g=gravity 9.81
d=average depth of ocean
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June 9th, 2010 at 12:55 am
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ok i did the problem out (it took me a while) and i finally got the right answer. i got 4.56m