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3 March, 16:39

A bubble originating at the bottom of a lake rises to the surface within 10.0 seconds with an acceleration of 10.0 meters/second2. What is the depth of the lake?

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  1. 3 March, 16:41
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    The answer is 500 m.

    d = u * t + 1/2 a * t²

    We know:

    d = ? (distance)

    u = 0 (the initial velocity)

    t = 10 s (time

    a = 10 m/s² (acceleration

    d = u * t + 1/2 a * t²

    d = 0 * 10 + 1/2 * 10 * 10²

    d = 0 + 1/2 * 10 * 100

    d = 500 m
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