If I had two cups of hot water and put one in the fridge and left one

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If I had two cups of hot water and put one in the fridge and left one on the table which one after 10 minutes would be cooler ?
I have no idea and have been asked this question, thanks in advance for the answer.
 

Answers and Replies

  • #2
mgb_phys
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All else being equal the rate of cooling depend son the temperature difference between the water and it's surroundings - so unless it's very cold in your kitchen, the fridge would be better.
 
  • #3
ideasrule
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If I had two cups of hot water and put one in the fridge and left one on the table which one after 10 minutes would be cooler ?
I have no idea and have been asked this question, thanks in advance for the answer.
Do you really need physics to answer this question? I mean, really? I don't want to be harsh, but common sense should tell you the answer.
 
  • #4
mgb_phys
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Isn't physics simply asking 'why' to commonsense questions?

edit: I did think they would follow up with a more 'but why' type question !
 
  • #5
fluidistic
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If I had two cups of hot water and put one in the fridge and left one on the table which one after 10 minutes would be cooler ?
I have no idea and have been asked this question, thanks in advance for the answer.
Yeah I find very strange that you have no idea about the answer. Also, the experiment is quite easy to do (you only 2 glasses of water + a fridge).
Then putting the same finger in each glass should tell you the answer.
 
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The real question is why is it that hot water will make ice-cubes faster than cold water...
 
  • #8
DaveC426913
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The real question is why is it that hot water will make ice-cubes faster than cold water...
It won't.

Except in very carefully-controlled circumstances.
 
  • #9
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All else being equal the rate of cooling depend son the temperature difference between the water and it's surroundings - so unless it's very cold in your kitchen, the fridge would be better.
ok if the room was 20°C warmer what would the answer be ?
 
  • #10
fluidistic
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ok if the room was 20°C warmer what would the answer be ?
You definitely didn't read the link I provided... There are many more parameters than the room temperature to take into account.
 

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