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KWh to g/year?

  1. Apr 23, 2008 #1
    A typical home uses approximately 1600 kWh of energy per month.If the energy came from a nuclear reaction, what mass would have to be converted to energy per year to meet the energy needs of the home? (in g/year)

    I dont know how to do this problem :S
  2. jcsd
  3. Apr 23, 2008 #2


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    the things you need to know to solve the problem are:

    a watt has units: J/s

    E(in joules) [tex]= mc^{2}[/tex] <---this is the equation you should use to calculate how much mass is required to be converted.

    [tex]c = 2.9979 x 10^{8}[/tex]m/s <---speed of light.
    Last edited by a moderator: Apr 23, 2008
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