A perpetual motion machine of the first kind produces work without the input of energy. It thus violates the first law of thermodynamics: the law of conservation of energy.

He was incredibly communicative, promptly addressing any questions or concerns I had, and offering valuable insights about the artwork. I wholeheartedly recommend William's kinetic wall art to any art enthusiast looking to add a touch of brilliance and elegance to their living space." Wooden Kinetic Sculpture - WINGS, Modern Art Decor

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Mini prisma de alzamiento de prisma, prisma de ángulo íntegro de 90 grados prisma L barra de cobre revestido mini prisma para la tiempo total

"I have been collecting unusual things for a long time and this perpetual motion machine is one of my instant favourites. Great quality, the hidden on/off switch adds to the illusion.

I would highly recommend this for a gift or even for yourself Figura a fun showpiece. It's also great to shop small and support this shop through their endeavors! So cool of I haven't said it yet, but it's so cool I highly recommend!!!" Automatic Zen Garden Sand Bowl - Kinetic Art

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^ The device shown is a "mass leverage" device, where the spherical weights on the right have more leverage than those on the left, supposedly creating a perpetual rotation. However, there are a greater number of weights on the left, balancing the device.

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The history of perpetual motion machines dates back to the Middle Ages.[13] For millennia, it was not clear whether perpetual motion devices were possible or not, until the development of modern theories of thermodynamics showed that they were impossible.

[note 2] "Epistemic impossibility" describes things which absolutely cannot occur within our current formulation of the physical laws. This interpretation of the word "impossible" is what is more info intended in discussions of the impossibility of perpetual motion in a closed system.[22]

"Just perfect! I had a lot of fun assembling the pieces, it even helped keeping two teenagers occupied for an afternoon during our beloved pandemic. Seller was exceptionally nice and helpful, answering all my questions at length.