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Re: Powers up the Ultimate Weapon™
Posted By: Mark Levin <mglevin@uiuc.edu>	Date: 11/14/99 9:50 p.m.
In Response To: Re: Powers up the Trademarked Weapon™ (Mage) The change in internal energy is equal to the work performed on the system plus the heat entering the system. In this instance, the heat flow is zero (the Earth is an isolated body) so the change in internal energy is equal to the work performed. That work is equal to the mass moved time the distance moved. So all the energy is extracted from the motion of the rock due to gravity as it compresses. The act of pressure isn't creating the heat (in fact nothing is), the energy the rock releases as it falls towards the core is absorbed by the interior (or in any other instance of compression, the energy is extracted from whatever is performing the compression) and appears as heat. When the process is reversed, the work performed by the object in expanding is radiated to the environment and the object cools. So pressure doesn't create heat, it's a side effect of the insertion of heat into the object being compressed. By the way, this is all from my thermodynamics textbook.

Message Index

Smoke plume and different sky revealed!	Wirehead	11/10/99 4:11 a.m.
Re: Smoke plume and different sky revealed!	MacDrugal	11/10/99 9:41 a.m.
Re: Smoke plume and different sky revealed!	wondercrank	11/10/99 2:22 p.m.
volcano if you ask me...	Ben Schodek	11/10/99 6:23 p.m.
Re: volcano if you ask me...	Mark Levin	11/10/99 7:07 p.m.
My kingdom for a ship.....:)	Sempiternity	11/11/99 10:13 a.m.
Re: volcano if you ask me...	SiliconDream	11/10/99 7:42 p.m.
Re: volcano if you ask me...	Mage	11/10/99 11:10 p.m.
Re: volcano if you ask me...	SiliconDream	11/11/99 12:10 a.m.
Re: volcano if you ask me...	Mage	11/11/99 5:49 p.m.
Inner and Outer cores.	Bachus	11/12/99 2:39 p.m.
Re: Inner and Outer cores.	Mage	11/12/99 3:36 p.m.
Re: Inner and Outer cores.	Desio	11/12/99 4:21 p.m.
Re: Inner and Outer cores.	Mage	11/13/99 12:30 p.m.
Yes, Mage, radioactive decay (OT)	SiliconDream	11/13/99 11:10 p.m.
Re: Yes, Mage, radioactive decay (OT)	Mage	11/14/99 1:01 a.m.
Re: Yes, Mage, radioactive decay (OT)	Mark Levin	11/14/99 1:23 a.m.
Switching focus.....	Sempiternity	11/14/99 12:40 p.m.
Powers up the Trademarked Weapon™	SiliconDream	11/14/99 3:37 a.m.
Re: Powers up the Trademarked Weapon™	Mage	11/14/99 10:41 a.m.
Re: Powers up the Trademarked Weapon™	SiliconDream	11/14/99 2:20 p.m.
Re: Powers up the Trademarked Weapon™	Mage	11/14/99 8:15 p.m.
Re: Powers up the Ultimate Weapon™	Mark Levin	11/14/99 9:50 p.m.
Really Boring Post	SiliconDream	11/15/99 1:21 a.m.
Re: volcano if you ask me...	Mage	11/10/99 11:16 p.m.
Re: volcano if you ask me...	MacDrugal	11/11/99 2:14 a.m.
Re: volcano if you ask me...	Louis Wu	11/11/99 9:12 p.m.
Re: volcano if you ask me...	MacDrugal	11/12/99 1:11 a.m.