Conversion of kWh to find cost

  • #1
A digital clock has an operating resistance of 11000 and is plugged into a 114-V outlet. Assume the clock obeys Ohm's law.

If the owner of the clock pays $0.09 per kWh, what does it cost to operate the clock for 34 days?

Where do I even begin?
 

Answers and Replies

  • #2
Borek
Mentor
28,546
2,991
What current goes through the clock?

How does power depend on the current and voltage?
 

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