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 kmfrom 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/s?
Express your answer using two significant figures.
ANSWER:
v = 220 m/s
Part B
What was the speed of these waves in km/h?
Express your answer using two significant figures.
ANSWER:
v = 800 km/h