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  1. keannu's Avatar
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    #1

    spoonful vs pot

    Heat and temperature are two quantities that can be easily confused. Imagine cooking a very large pot of
    chicken soup on the stove. Letís suppose you heat the soup until it is 95℃, quite hot. ( ① ) You grab a spoon
    and take out a spoonful of soup to taste. ( ② ) As you remove the spoonful of soup from the pot, it has the
    same temperature as the larger sample. ( ③ ) Unfortunately, as you bring the soup towards your mouth to taste it, the spoon slips from your hand, pouring its contents on your bare foot. ( The spoonful of 95℃ soup hitting your foot hurts, but not as badly as it would if you accidentally spilled the entire pot of 95℃ soup on your foot. ) If both the spoonful and the pot full of soup have the same temperature, why would the larger sample cause more damage if it came in contact with your skin? ( ⑤ ) The answer to the question lies in the difference between temperature and heat.
    ======================================
    Does "spoonful" represent "heat" while "pot", "temperature"? Or the other way around?

  2. MikeNewYork's Avatar
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    #2

    Re: spoonful vs pot

    The other way around.

  3. Barb_D's Avatar
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    #3

    Re: spoonful vs pot

    Neither!
    They are at the same temperature.
    The spoonful is a small amount of heat and the pot is a large amount of heat.
    I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.

  4. MikeNewYork's Avatar
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    #4

    Re: spoonful vs pot

    They have the same initial temperature. But the temperature of a very small amount of hot liquid will begin to decline quickly with contact with ambient air and contact with tissue. The temperature of the pot liquid will decline much slower.

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    #5

    Re: spoonful vs pot

    The text is making the point that, although the spoonful and the pot-full are at the same temperature, the pot-full contains more heat.

    If you're familiar with electricity, temperature is analogous to voltage while heat is like power, which is measured in watts.
    Last edited by GoesStation; 13-Feb-2016 at 17:26.
    I am not a teacher.

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    #6

    Re: spoonful vs pot

    A spoonful of soup will transfer less heat to your foot than then entire pot will.

  5. tzfujimino's Avatar
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    #7

    Re: spoonful vs pot

    I found this:

    http://coolcosmos.ipac.caltech.edu/c...al/differ.html

    I remembered physics classes I had when I was a student.


  6. kilroy65's Avatar
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    #8

    Re: spoonful vs pot

    It all comes down to pain in the end.

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    #9

    Re: spoonful vs pot

    The difference between heat and temperature is the simple explanation for the seemingly miraculous firewalk. People make a twenty-foot-long walkway covered with red-hot, burning charcoal. After suitable preparation, they are able to walk the whole length of it, barefoot, without burning themselves.

    The secret is that, although the coals are at a high temperature, they're not very dense and therefore don't contain a lot of heat. As long as you walk quickly, your feet only touch the hot coals very briefly with each step. The heat can't transfer quickly enough to burn you.

    I have a feeling that accomplished firewalkers use only very soft wood to make the charcoal.
    I am not a teacher.

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