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Re: [Phys-L] Figuring Physics solution Jan 2018

On Thursday, January 25, 2018 7:05 PM, Bob LaMontagne wrote:

Since we a rephrasing Hewitt's question so it fits our answers, let's try another

I have a beaker containing 1 liter of water at 40 C. I pour out 50 ml. Has the
temperature of the water in the beaker changed?

Hewitt's question is no more complicated nor deep than that. His proposed
response choices are more than adequate.

I'm not sure I follow.

I assume the water temperature does not change in this case.

Are you suggesting that the water temperature does not change in this case because the selection of molecules (i.e., those that are poured out) are independent of their KE, whereas in evaporation higher KE molecules are more likely to be removed?

Robert Cohen Department of Physics East Stroudsburg University
570.422.3428 East Stroudsburg, PA 18301