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24 September, 06:26

A stationary boat in the ocean is experiencing waves from a storm. the waves move at 54 km/h and have a wavelength of 170 m. the boat is at the crest of a wave. part a how much time elapses until the boat is first at the trough of a wave?

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  1. 24 September, 06:43
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    The answer is: 5.665 seconds

    Explanation:

    Given:

    Speed = v = 54 km/h

    Change it to m/s; therefore,

    Speed = v = 54 / 3.6 = 15 m/s

    Wavelength = λ = 170 m

    Since

    v = f λ

    So f = v/λ

    Plug in the values:

    f = 15/170 = 3/34 Hz

    Now time = 1/frequency

    => t = 1 / (3/34) = 34/3 = 11.33s

    The time should be half as the trough to crust distance as λ/2; therefore

    t = 11.33/2 = 5.665s
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