cost of electrical energy

Physics
Tutor: None Selected Time limit: 1 Day

you watch baseball's World Series games over a period of 7 days for 3 hours each day. You watch the game on a black and white tv set rated at 90.0 W. Calculate how much it cost you to watch the event assuming the electrical energy costs $0.07 /kWh

May 19th, 2015

7days=3x90x7=1890 watts-hour

i kWh=1,000 watts-hour

?       =1890 watts-hour

=1.89 kWh

1.89x0.07=132.3

$ 132.30

May 19th, 2015

seriously?


1.89 x 0.07 = .1323


how did you get $132.30?  you multiplied by 1000?

May 19th, 2015

you right...i did so fast

May 19th, 2015

so watching the tv for 7 days for 3 hours will cost


$132.30?? why exactly do you multiply by 1,000?

May 19th, 2015

said you right...its 0.132

May 19th, 2015

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May 19th, 2015
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May 19th, 2015
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