Notas detalladas sobre Perpetual Marble Machine Kinetic
Notas detalladas sobre Perpetual Marble Machine Kinetic
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Perpetual motion wheels from a drawing by Leonardo da Vinci Another theoretical machine involves a frictionless environment for motion. This involves the use of diamagnetic or electromagnetic levitation to float an object. This is done in a vacuum to eliminate air friction and friction from an axle. The levitated object is then free to rotate around its center of gravity without interference.
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The efficiency of real heat engines is even lower than the Carnot efficiency due to irreversibility arising from the speed of processes, including friction.
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The Atmos clock uses changes in the vapor pressure of ethyl chloride with temperature to wind the clock spring.
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These machines have a source of energy, albeit one which is not readily apparent, so that they only seem to violate the laws of thermodynamics.
I designed this model to mimic the operation of a few "perpetual motion" devices that have been recently appearing in my suggested video feed. "Marblevator, Perpetual?" is not only not perpetual, it is also not very quiet. But the kids and grandkids enjoyed it!
In some cases a thought experiment appears to suggest that perpetual motion may be possible through accepted and understood physical processes. However, in all cases, a flaw has been found when all of the relevant physics is considered. Examples include:
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The drinking bird toy functions using small ambient temperature gradients and evaporation. It runs until all water is evaporated.