_____ J
* Circuits
2007-04-10 15:16:14 · 5 answers · asked by Khoi 1 in Science & Mathematics ➔ Physics
Energy consumed = wattage x seconds used.
=1500 x 6 x60 J
=540 kJ
2007-04-10 15:33:24 · answer #1 · answered by t y 2 · 0⤊ 1⤋
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.
2007-04-10 15:29:56 · answer #2 · answered by jackstrobe 1 · 2⤊ 0⤋
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.
2007-04-10 15:19:03 · answer #3 · answered by carl 2 · 0⤊ 2⤋
1500 Watts x 0.10 Hour = 150 Watt Hr = 0.150KWH
1KWH = 3,600.000J
0.150KWH = 540,000J
Check my math
2007-04-10 15:34:33 · answer #4 · answered by gatorbait 7 · 0⤊ 0⤋
Its 150 Watt-hours I'd have to look up the conversion to joules.
2007-04-10 15:20:42 · answer #5 · answered by Roadkill 6 · 0⤊ 1⤋