Una revisión de Perpetual Marble Machine Kinetic
Una revisión de Perpetual Marble Machine Kinetic
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The correct explanation involves electromagnetic induction. The electromagnet is always switched off and is then switched on
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The "Overbalanced Wheel", annotated with distances of the weights from the centreline showing that the torques on both sides even demodé on average Gravity also acts at a distance, without an apparent energy source, but to get energy trasnochado of a gravitational field (for instance, by dropping a heavy object, producing kinetic energy Vencedor it falls) one has to put energy in (for instance, by lifting the object up), and some energy is always dissipated in the process. A typical application of gravity in a perpetual motion machine is Bhaskara's wheel in the 12th century, whose key idea is itself a recurring theme, often called the overbalanced wheel: moving weights are attached to a wheel in such a way that they fall to a position further from the wheel's center for one half of the wheel's rotation, and closer to the center for the other half.
Students will quickly notice that both the balls and rails are made of metal, which offers an immediate clue that magnets might be involved. The device does not look to have an on/off switch, so the magnet is not switched on continuously. At any rate, a constant or slowly varying magnetic field would not be able to produce the phenomenon that is observed, since energy will be lost during each cycle due to friction. Another possibility is that the device simply runs for an extremely long time, but does not run indefinitely.
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Distinctions aside, on the macro scale, there are concepts and technical drafts that propose "perpetual motion", but on closer analysis it is revealed that they actually "consume" some sort of natural resource or latent energy, such Campeón the phase changes of water or other fluids or small natural temperature gradients, or simply cannot sustain indefinite operation. In general, extracting work from these devices is impossible. Resource consuming[edit]
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October 1920 issue of Popular Science magazine, on perpetual motion. Although scientists have established them to be impossible under the laws of physics, perpetual motion continues to capture the imagination of inventors.
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.
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To extract work from heat, thus producing a perpetual motion machine of the second kind, the most common approach (dating back at least to Maxwell's demon) is unidirectionality. Only molecules moving fast enough and in the right direction are allowed through the demon's trap door. In a Brownian ratchet, forces tending to turn the ratchet one way are able to do so while forces in the other direction are not. A diode in a heat bath allows through currents in one direction and not the other.
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Thus, machines that extract energy from finite sources cannot operate indefinitely because they are driven by the energy stored in the source, which is eventually exhausted.
Those of you who have taken a physics course or two know that perpetual motion machines are impossible to make Ganador they violate the first and second laws of thermodynamics.