need help with this question! quiz coming up..thanks!?

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need help with this question! quiz coming up..thanks!?

a space heater, operating from a 120V line has a hot resistance of 14ohms. at what rate is electrical energy turned into heat, and how much will it cost to operate it for 6 hours at $0.13/kWh

2007-07-18 15:55:51 · 2 answers · asked by Kel 1 in Science & Mathematics ➔ Physics

2 answers

V = I*R
120=14* I
I = 8.57 amps
V*I= power= 120*8.57= 1029 watts appx.
Cost = 1.029 kw * 6 hours * 13 cents/kw-hr
Cost = about 80 cents.

2007-07-18 16:05:41 · answer #1 · answered by cattbarf 7 · 0⤊ 0⤋

Contact: lilkraut@yahoo.com

2007-07-18 16:05:36 · answer #2 · answered by Anonymous · 0⤊ 0⤋