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Re: [Phys-L] ?conservation of _internal_ energy

On Jan 14, 2016, at 8:57 AM, John Denker <jsd@av8n.com> wrote:


Therefore it may be helpful to look at a non-gravitational
example. Consider the situation shown here:
https://www.av8n.com/physics/img48/internal-energy-noncon.png

Howdy,

Yes, imagine a gas instead of the spring. As the gas expands it pushes the piston and does work. The Temperature of the gas will go down and the Internal energy of the gas will go down. So yes, the Internal energy is not constant. What is your argument that the Internal energy SHOULD be constant?

Good Luck,

Herb Schulz
(herbs at wideopenwest dot com)