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Power of your calculater

  1. yes

  2. no, I dont know the equations

    0 vote(s)
  3. no, I forgot all the stuffs

    0 vote(s)
  4. no, I'm not sure about the equations

    0 vote(s)
Multiple votes are allowed.
  1. Feb 12, 2009 #1
    1. The problem statement, all variables and given/known data
    a battery delivers nearly constant voltage of 1.5 V and stores about 10^4 joule of energy.

    2. Relevant equations
    From time it takes you to use up the batteries in your calculator estimate the resistance of your calculator.

    3. The attempt at a solution
    I really dont know the equations I need for this question, this was a review problem set from gr.11. I dont have the gr.11 physics text book and it's not on the gr12 textbook.

    Please post the equations I need for this question, thanks!
  2. jcsd
  3. Feb 12, 2009 #2


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    Homework Helper

    Re: power of your calculater

    They give you total energy. That's Joules.

    If you divide by the total time, J/s - watts.

    Watts is V*I and you have V, so you can figure I.

    And V = I*R

    gives you R.
  4. Feb 13, 2009 #3
    Re: power of your calculater

    thank you so much
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