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7th Grade Problem

  1. Mar 4, 2015 #1
    1. The problem statement, all variables and given/known data
    Two identical objects A and B are placed in contact with each other. If therml energy is transferred from A to B, then A will have a higher
    1) Potential energy
    2) Kinetic energy
    3) Temperature
    4) Pressure

    2. Relevant equations
    None.

    3. The attempt at a solution
    I put option number 4. However, the answer scheme said that the correct answer was 3, which happened to be ridiculous.
     
  2. jcsd
  3. Mar 4, 2015 #2

    Borg

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    Why do you think that Temperature is ridiculous? What do you think that thermal energy is?
     
    Last edited: Mar 4, 2015
  4. Mar 4, 2015 #3
    Thermal energy is supposed to be the amount of heat an object has. If A transfers thermal energy to B, then A would have less thermal energy than B. Thus, A would have a lower temperature than B.
     
  5. Mar 4, 2015 #4

    Borg

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    A can't become colder than B when it's in contact with B. At most, it would reach equilibrium.

    However, I don't think the final state is what the question is asking for. From what you wrote, I would think that they want to know the starting conditions. In that case, A has to have a higher starting temperature.
     
  6. Mar 4, 2015 #5

    SteamKing

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    You obviously don't realize that heat flows from hotter objects to colder objects, not the other way around.
     
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