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Time to boil a water kettle

  1. Jun 15, 2008 #1
    My friend asks me this question, I have not worked it out.
    I hope it is suitable to maths box .

    The time to boil a small kettle of water using a electric coil is A minutes.
    Q: How many minutes needed to boil a big kettle (two times the mass of water compared to the small kettle), if using the same coil. Consider no heat is transmitted away to the ambient.
  2. jcsd
  3. Jun 15, 2008 #2


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    It is 2A
  4. Jun 15, 2008 #3
    Is it the same metal kettle the entire time?

    If so, then the answer is 2A.

    Also, this would be a better fit in the general physics forum than in general math.
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