# physics

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An electric pump needs to be installed on a deep well to provide water. If the well is 30m deep and 50L of water must be pumped out per minute. How powerful a pump is needed ? (watts)

• physics -

50 l/min = 5/6 kg/s

Power required = (mass flow rate)*g*H
= (5/6)(9.8)(30) kg/s*m/s^2*m or W
= 245 W

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