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Physics / Sears and Zemansky's University Physics with Modern Physics 13 / Chapter 15 / Problem 3E

Sears and Zemansky's University Physics with Modern Physics | 13th Edition | ISBN: 9780321696861 | Authors: Hugh D. Young; Roger A. Freedman; A. Lewis Ford

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Answer: Tsunami! On December 26, 2004, a great earthquake

Chapter 15, Problem 3E

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QUESTION:

Problem 3E

Tsunami! On December 26, 2004, a great earthquake occurred off the coast of Sumatra and triggered immense waves (tsunami) that killed some 200,000 people. Satellites observing these waves from space measured 800 km from one wave crest to the next and a period between waves of 1.0 hour. What was the speed of these waves in m/s and in km/h? Does your answer help you understand why the waves caused such devastation?

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QUESTION:

Problem 3E

Tsunami! On December 26, 2004, a great earthquake occurred off the coast of Sumatra and triggered immense waves (tsunami) that killed some 200,000 people. Satellites observing these waves from space measured 800 km from one wave crest to the next and a period between waves of 1.0 hour. What was the speed of these waves in m/s and in km/h? Does your answer help you understand why the waves caused such devastation?

ANSWER:

Solution to 3E

Step 1

Distance from one crest to other = Wavelength of the longitudinal wave

𝜆=800 km =8x105m

Time =1hr=60s

Frequency of the wave=(1/T) =(1/60)=16.6x10-3Hz

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