Una llave simple para Perpetual Marble Machine Kinetic Unveiled
Una llave simple para Perpetual Marble Machine Kinetic Unveiled
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The principles of thermodynamics are so well established, both theoretically and experimentally, that proposals for perpetual motion machines are universally dismissed by physicists. Any proposed perpetual motion design offers a potentially instructive challenge to physicists: one is certain that it cannot work, so one must explain how it fails to work. The difficulty (and the value) of such an exercise depends on the subtlety of the proposal; the best ones tend to arise from physicists' own thought experiments and often shed light upon certain aspects of physics.
The law that entropy always increases – the second law of thermodynamics – holds, I think, the supreme position among the laws of Nature. If someone points out to you that your pet theory of the universe is in disagreement with Maxwell's equations – then so much the worse for Maxwell's equations.
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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.
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You simply have to charge this machine and drop a ball to have it roll all day long. This machine has a touch button that you Gozque push to turn it on.
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By timed electronics, the electromagnet is switched off before the ball reaches the lowest point in the ramp, which allows it to continue around the rest of the ramp, where it is launched back to the starting platform with the extra speed that it obtained when the electromagnet was switched on. The process is then repeated indefinitely. This explanation is incorrect, however, as the extra kinetic energy imparted in this way would be insufficient to allow the ball to travel all more info the way back to the starting platform. The presence of a CPU in the base of the device confirms that the contemporáneo mechanism is slightly subtler than this and involves sensors.
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1 There have historically been many purported perpetual motion machines.2,3 A close analysis of the machine invariably finds either that there is some assumption that violates the laws of thermodynamics or that there is some input from an external energy source, which means that the system is not isolated.4,5 In this article, we will consider an amusing example of such a machine, in which a ball starts on a platform, falls through a hole, and slides down a track formed from two side-by-side stainless steel rods.6 I explain how the machine Gozque be used in class to illustrate physical principles, outline the possible mechanisms, and end with an explanation of the correct mechanism.