Simple question about E=MC^2

Gweedz
Gweedz
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Topic 191986

My understanding is that if E decreases, then M must decrease also.
So does that mean a chilled bottle of Merlot has less mass than the same bottle at room temp?

Joachim Schmidt
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Simple question about E=MC^2

Quote:
My understanding is that if E decreases, then M must decrease also.
So does that mean a chilled bottle of Merlot has less mass than the same bottle at room temp?

Yes, this is right. Althoug it is not much ...
If you decrease the temperature of 1 liter water by 10 °C, it's weight should decrease by about 10^-12 kg.

greets

Gweedz
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Thanks! I always wondered

Thanks! I always wondered about that.

At Absolute Zero, does E=0? Or is there still some energy that is not temp. dependent?

RenaudKener
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RE: Thanks! I always

Message 48895 in response to message 48894

Quote:

Thanks! I always wondered about that.

At Absolute Zero, does E=0? Or is there still some energy that is not temp. dependent?


1) The "mass at rest" of a body isn't equal to zero. Thus the energy isn't zero.

2) Near absolute zero there is still energy and you cannot reach EXACTLY absolute zero - because for particules to have exactly NO motion at all would violate Heisenberg's principle. You can go closer and closer to absolute zero, but it's an asymptote curve, you can't reach it exactly.

"Entia non sunt multiplicandam praeter necessitatem"
(OKHAM)

gravitonring
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how to get close and win a

how to get close and win a rubidium or helium cigar

http://depts.washington.edu/nwst/issues/index.php?issueID=fall_2006&storyID=811

http://www.colorado.edu/physics/2000/bec/what_is_it.html

everything is true, the opposite of everything is also true

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