Thursday, June 17, 2010

What is the total electrical energy used by a 1500 watt hair dryer operating for 6.0 minutes?

_____ J



* Circuits



What is the total electrical energy used by a 1500 watt hair dryer operating for 6.0 minutes?

Energy consumed = wattage x seconds used.



=1500 x 6 x60 J



=540 kJ



What is the total electrical energy used by a 1500 watt hair dryer operating for 6.0 minutes?

the 1500 watt should be out of an hour, and 6 minutes is 1/10 of an hour (or .1 or it) , so 1500 x .1 = 150 watts.



What is the total electrical energy used by a 1500 watt hair dryer operating for 6.0 minutes?

Its 150 Watt-hours I'd have to look up the conversion to joules.



What is the total electrical energy used by a 1500 watt hair dryer operating for 6.0 minutes?

A watt (power) is the amount of energy (1joule) per unit time (sec)--therefore 1Watt = 1 joule/sec. If the hair dryer is rated at 1500 Watts of power, then it will use



Power = Energy / time or Energy = Power * time



Energy = 1500 W * 6 minutes * 60 sec/minute



= 540,000 joules of energy.



What is the total electrical energy used by a 1500 watt hair dryer operating for 6.0 minutes?

1500 Watts x 0.10 Hour = 150 Watt Hr = 0.150KWH



1KWH = 3,600.000J



0.150KWH = 540,000J



Check my math

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