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Re: first law of thermo



"Assume some of (probably most of)
the thermal energy is in the form of thermal phonons. For
a phonon, half the energy is kinetic and half is potential.
It's just a harmonic oscillator, after all."

Suppose the temp. is very high so the restoring force is no longer linear. Is
the only effect, the ratio of pe and ke is no longer one?

bc




"John S. Denker" wrote:

"Carl E. Mungan" requested:

Maybe it would help to cite a specific example (that involves actual
numerical calculations not just concepts) that can be done using your
favorite method x but not using conventional textbook methods. Do you
have such an example?

So I wrote:

What about the Rumford experiment, for example? If
you want it to be numerical (as well as conceptual),


cut

False because:
The change in kinetic energy is not equal to the W defined
above. Not even close. Assume some of (probably most of)
the thermal energy is in the form of thermal phonons. For
a phonon, half the energy is kinetic and half is potential.
It's just a harmonic oscillator, after all.

Step 2. LOOK IN CONSERVATION OF ENERGY CHAPTER
Apply delta(E) = 0 assuming an isolated block+table system => 0 =

cut