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Homework Help: Thermal energy problem

  1. Sep 28, 2009 #1
    1. The problem statement, all variables and given/known data
    A typical coal-fired electric power plant has an efficiency of 39.5%, while a nuclear power plant is 33.5% efficient.
    (a) How many joules of thermal energy are required by each plant to generate one joule of electrical energy? How much heat does each plant exhaust as waste?

    2. Relevant equations
    None that I know :(

    3. The attempt at a solution
    unsure how to go about this problem, any help is appreciated.
    Last edited: Sep 28, 2009
  2. jcsd
  3. Sep 29, 2009 #2


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    Staff Emeritus
    Science Advisor
    Homework Helper

    How do you think the following are related:
    • Energy consumed
    • Energy generated
    • Efficiency

    In other words, how is efficiency defined?
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