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Electrical Energy and Power (Wrong because of decimal place)

  • Thread starter AznBoi
  • Start date
  • #1
471
0

Homework Statement


How much does it cost to watch a complete 21-hour-long World Series on a 180-W television set? Assume that electricity costs $0.070/kWh

The Attempt at a Solution



[tex] \frac {0.070}{kWh} = \frac {x}{(180*10^{3}kW)(21h)}[/tex]

[tex] \frac {0.070*(180*10^3 kW)(21h)}{kWh} = x [/tex]

I got $264,600 when the answer is suppose to be 26 cents. What am I doing wrong here? Thanks.
 

Answers and Replies

  • #2
340
0
Why do you have 180*[tex]10^3[/tex]kW?
 
  • #3
21
0
Yes, you've converted your power the wrong way.
 

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