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Final Temperature Problem

  1. Dec 17, 2013 #1
    1. The problem statement, all variables and given/known data
    I just solved how much heat is needs to make a -15C ice to 55C water but i dont know how to find how long it takes.

    How long will it take to reach 55C?
    2. Relevant equations



    3. The attempt at a solution
    Not even sure where to begin
     
  2. jcsd
  3. Dec 17, 2013 #2

    rock.freak667

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    Are you given a heater of some wattage is being used to provide the heat?
     
  4. Dec 17, 2013 #3
    yes its a 40 watt hot plate i didnt see that before. So would you do 40w=Q/T(variable)?
     
  5. Dec 18, 2013 #4

    rock.freak667

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    Yes, remember that Power = Rate of transfer of energy / time, so you are correct.
     
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