strawberrymrmr3068
22.04.2020 •
Physics
On December 26, 2004, a great earthquake occurred off the coast of Sumatra and triggered immense waves (tsunami) that killed some 200000 people. Satellites observing these waves from space measured 800 kmkm from one wave crest to the next and a period between waves of 1.0 hour. Part A What was the speed of these waves in m/sm/s
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Ответ:
Explanation:
Given that,
200,000 people where killed due to earth quake in December 2004
Satellite observing measure a wavelength of 800km crest to crest
Crest to crest implies one wavelength
λ = 800km = 800,000m
Period of One hour
T = 1 hour = 3600s
Then, we want to find speed of wave.
Using wave equation
v = fλ
Where
f is frequency in Hz
v is speed of wave in m/s
λ is wavelength in m
Where f = 1 / T
Then, v = λ / T
v = 800,000 / 3600
v = 222.22 m/s
Then, the speed of the wave is 222.22 m/s
Ответ: