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To: thackney

“Velocity is not an energy level” - no, velocity is kenetic energy - the energy of motion.

“Velocity gives potential energy” - potential energy is the energy “no motion”. A lifted weight has potential energy that will be given up as it falls to a lower level.

A molecule of air hitting a moving turbine blade is like a ball hitting an object that is moving away from the ball. The ball after impact will have a slower speed than before, and the object will have hibher higher speed. Energy is transferred from the ball to the car.

With a gas, velocity, or let’s say speed which does not have an associated direction, is thermodynamically equivalent to temperature.


51 posted on 05/02/2012 7:17:47 AM PDT by cymbeline
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To: cymbeline

Potential energy does not relate to an object temperature.

Velocity will not increase an object temperature any more than lifting an object above the floor.

All velocity measurements are relative to other objects. Velocity has no absolute and stand alone measurement like temperature has. They are not related the way temperature, volume and pressure are related for gases.


52 posted on 05/02/2012 7:26:01 AM PDT by thackney (life is fragile, handle with prayer)
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To: cymbeline

Maybe this related example will help explain it better.

Take a child’s pinwheel. Hold it in a 20 mph breeze. Now live it 20 mph in still air. The reaction and effect on the air are the same, very minor heating by friction. The velocity was only relative to the ground as to which was moving and not part of the interaction equation.

For what you claim to work would require “still” air to drop in temperature aa you move the pinwheel through it.


53 posted on 05/02/2012 7:34:36 AM PDT by thackney (life is fragile, handle with prayer)
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To: cymbeline

Sorry, move it 20 mph, not live it.

I’m typing on a phone with autocorrect and I missed that in the preview.


54 posted on 05/02/2012 7:36:54 AM PDT by thackney (life is fragile, handle with prayer)
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