Physics, 26.07.2019 14:00, jolleyrancher78
A20 watt lightbulb uses 20 joules of energy every second. a person expends 50 watts of energy per stair when climbing up stairs. how long could you light the lightbulb if the energy used to climb 20 stairs were converted to electricity?
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A20 watt lightbulb uses 20 joules of energy every second. a person expends 50 watts of energy per st...
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