One cubic meter of water is poured off a 100-m high bridge. If the change in ravitational potential energy is converted into electricity with an efficiency of 90%, how long can this energy illuminate a standard 60-W light bulb?

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The Answer of One cubic meter of water is poured off a 100-m high bridge. If the change in ravitational potential energy is converted into electricity with an efficiency of 90%, how long can this energy illuminate a standard 60-W light bulb?

One Cubic Meter of Water Is Poured Off a 100-M