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Homework Help: Conversion of kWh to find cost

  1. Dec 4, 2008 #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?
  2. jcsd
  3. Dec 4, 2008 #2


    User Avatar

    Staff: Mentor

    What current goes through the clock?

    How does power depend on the current and voltage?
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