Suppose you are on a ship at rest in the ocean, observing the crests of a passin

Question

Suppose you are on a ship at rest in the ocean, observing the crests of a passing sinusoidal wave. You estimate that the crests are 75 apart. The speed of deep-water waves depends on the wavelength as follows:
v= sqrt ( g(lamda)/ 2pie)

1. Approximately how much time elapses between one crest reaching your ship and the next?

2. The captain starts the engines and sails directly opposite the motion of the waves at 4.5 . Now how much time elapses between one crest reaching your ship and the next?

3.In the deep ocean, a longer-wavelength wave travels faster than a shorter-wavelength wave. Thus, a higher-frequency wave travels ______ a lower-frequency wave.
a- faster than
b-at the same speed as
c- slower than

Explanation / Answer

v=(9.8*75/(1*3.14))^0.5=15.2 t=75/15.2=4.8 sec 3)a

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