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9 October, 19:00

Water flows over Victoria Falls, which is 128 m high, at an average rate of 1.66 * 106 kg/s. The acceleration of gravity is 9.81 m/s 2. If half the potential energy of this water were converted into electric energy, how much power would be produced by these falls? Answer in units of MW

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  1. 9 October, 19:12
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    The fall will produce 1.04*10³ MW power

    Explanation:

    Power: This is the rate at which work is done. The S. I unit of power is Watt (W)

    P = Energy/time

    P = mgh/t

    P = μgh ... Equation 1.

    Where P = power, μ = the mass rate of water flow, h = height, g = acceleration due to gravity.

    Given: μ = 1.66*10⁶ kg/s, h = 128 m, g = 9.81 m/s².

    Substituting these values into equation 1

    P = (1.66*10⁶*128*9.81) / 2

    Note: Half the potential energy of the water were converted to electric energy.

    P = 1.66*10⁶*64*9.81

    P = 1042.21*10⁶

    P = 1.04*10⁹ W

    P = 1.04*10³ MW

    Thus the fall will produce 1.04*10³ MW power
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