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9 March, 15:31

The speed of a tsunami s (in meters/second) is approximated by s=√gd, where g is the acceleration due to gravity (9.8 m/s2) and d is the depth of the water (in meters). If the speed of a tsunami is 200 m/s, about how deep is the water?

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  1. 9 March, 16:18
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    Use the formula, fill in the known variables, and solve for d.

    s = sqrt (gd)

    200 m/s = sqrt (9.8 m/s^2 * d)

    Square both sides.

    40000 m^2/s^2 = 9.8d m/s^2

    9.8d = 40000 m

    d = 40000/9.8 m

    d = 4082 m
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