1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: 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

    User Avatar
    Homework Helper

    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

    User Avatar
    Homework Helper

    Yes, remember that Power = Rate of transfer of energy / time, so you are correct.
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted