So the president and prime minister...

[Stealth1024]

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The President and the Prime Minister order coffee and receive cups of equal temperature (hot) at the same time. The President adds a small amount of cool cream immediately, but does not drink his coffee until 10 minutes later. The Prime Minister waits 10 minutes, and then adds the same amount of cool cream and begins to drink. Who drinks the hotter coffee?


This is a classic from what I understand.

My guess is the President due to Newton's Law of cooling. (So the higher the temp of the coffee compared to the surroundings, the greater the transfer of energry from the coffee to the surroundings per time...)

EDIT: And I can't get rid of the stupid formatting...
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[GasX]

Viva el presidente!

 

[Goosemaster]

Exactly What I thought

Not exactly a question that can accurately be answered with experimentation.


Two rates are necessary.

1)rate at which cream cools coffee
2)rate at which coffee cools

 

[XZeroII]

http://mvhs1.mbhs.edu/mvhsproj/cooling.html

Fixed that up for ya

 

[yllus]

Based merely on my common sense thoughts, the President adding more volume to the drink immediately probably means the heat is spread over that greater volume and cools more efficiently because of it. In my mind's eye, it's sort of like using a wider-than-normal heatsink to dissipate heat better.

 

[GoingUp]

I would say the president

 

[GasX]

the underlying theory behind getting the answer is you want to maximize the temperature differences for the maximum amount of time.

Frankly without knowing the temperature of everything including the air, the volume of liquids, the insulative properties of the cups, you can solve this. Still the President is the likely answer.