electric heater?

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An electric heater draws a current of 5.9A when it is plugged into a 120 V household power supply. How much does it cost if this heater is operated for 3.5 hours with 120 V household power supply? ( electrical energy costs 13 cents per KWh

Please show work

2007-09-27 11:42:20 · 2 answers · asked by mastersource2005 5 in Science & Mathematics ➔ Physics

2 answers

for d/c it is p=ie or power is equal to current x voltage. A/
C is more complicated but the pie formula is the easiest estimate.
So 5.9 x 120= x3.5=watts then figure that from kwh.
I'm not giving the answer, figure it out. Good brain exercise.

2007-09-27 11:50:06 · answer #1 · answered by skiingted 4 · 0⤊ 0⤋

The current times the voltage equals the kilowatts. Now times the time times .13 cents.

2007-09-27 18:50:55 · answer #2 · answered by JOHNNIE B 7 · 0⤊ 0⤋