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-----Original Message-----
From: phys-l-bounces@carnot.physics.buffalo.edu [mailto:phys-l-
bounces@carnot.physics.buffalo.edu] On Behalf Of Philip Keller
Sent: Friday, January 15, 2010 12:03 PM
To: 'Forum for Physics Educators'
Subject: Re: [Phys-l] T dS versus dQ
I still don't see how this experiment is relevant to the question at
hand: the question was (I thought) whether fast or slow made a
difference in the final temperature for an insulated piston. But this
device is clearly not insulated, so it seems to me that the apparatus
demonstrates that a quick compression, happening fast enough to be
modeled as adiabatic, causes a temperature increase, where a slow one
remains at the same temp. [Do we then say that the work in equals the
heat out? I know my textbook says that...] This is an interesting
demo, but the original question is not being tested.
-----Original Message-----thought
From: phys-l-bounces@carnot.physics.buffalo.edu [mailto:phys-l-
bounces@carnot.physics.buffalo.edu] On Behalf Of LaMontagne, Bob
Sent: Friday, January 15, 2010 11:53 AM
To: Forum for Physics Educators
Subject: Re: [Phys-l] T dS versus dQ
I'll go back and try that on one. We have a dozen setups and I always
the stiffness was a "feature" to keep everything isothermal :-)top
Bob at PC
-----Original Message-----
From: phys-l-bounces@carnot.physics.buffalo.edu [mailto:phys-l-
bounces@carnot.physics.buffalo.edu] On Behalf Of Bernard Cleyet
Sent: Friday, January 15, 2010 2:26 AM
To: Forum for Physics Educators
Subject: Re: [Phys-l] T dS versus dQ
Have you tried grease?
I'd replace the shaft w/ an unthreaded one and add a sleeve to the
_______________________________________________plate, so one may even do "mixing" in addition to quasi-adiabatic_______________________________________________
compression (rarefaction).
On 2010, Jan 14, , at 21:03, LaMontagne, Bob wrote:
Maybe ours are just stiffer than yours to turn.
_______________________________________________
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