Bojin Fan-shaped Asteroid Kinetic Desk Toy - Electronic Perpetual Motion - Helm

US $81

US, United States
Jun 2nd

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BOJIN Fan-shaped Asteroid Kinetic Desk Toy - Electronic Perpetual Motion - Helm Product Details Product Dimensions: 4.1 x 7.7 x 6.1 inches Item Weight: 12.3 ounces Shipping Weight: 11.2 ounces Item model number: BOJ001813 Solid plastic base and stainless steel frame. GREAT GIFT IDEA -- An exquisite gadget gets everyone's affection and makes a lively office decoration or executive gift. VERSATILE -- 1. An exquisite decoration that can be placed in house,school or office 2. Educational purpose 3. Psychological purpose MEANINGFUL -- Excellent educational & science gadget, own your very own piece of scientific history and explore significant values of physics. - Great gift idea, decoration, and a cool collection for the science physics enthusiast. - A simple spin of the top of the base sets the galaxy in motion. - Requires 4 AA batteries - not included. - Simple to assemble components, Silver rings continuously spin around a central sphere. This kinetic sculpture has several brightly colored metallic balls rotating like a Ferris wheel. A Brief History Perpetual motion continues indefinitely without any external source of energy. This is impossible to ever achieve The Perpetual Motion Machine, a hypothetical machine, that can work indefinitely without an energy source because of friction and other sources of energy loss, and the violation of the first or second law of thermodynamics.The idea of perpetual motion machine originated in India, around 1200 AD and the idea spread from India to the Islamic world, then spread to the west. During the Renaissance, Leonardo da Vinci (1452-1519) made a similar device, he thinks that the right heavy ball is farther than the left side ball for the distances from the center of the gravity, under the action of unbalanced, the wheels will rotation along the direction of arrow, but the results is negative. In the middle of the 19th century, a series of scientific workers to made tremendous contributions to recognize the function of heat transformation and transformation relationship of other forms of material movement, the great law of conservation and transformation of energy was found after it, and the law of conservation of energy is established. As the understanding of perpetual motion, some countries limit the invention of perpetual motion. About us: Pioneering developments for several years, BOJIN have been focusing on the exquisite technologies and physics tools. Shipping & Handling: Your order will be shipped within 3 business days once we receive your payment. The Shipping For USA Usually takes 2-4 business days to deliver. International destinations about 15 business days. if haven't receive it after 40 business days since you paid it, we will provide you the solution. Thank you! Term And Conditions We Have confidence in our products, but if you are not fully satisfied please contact us within 14 days of purchase and you will get full refund of your money. Return the product in the same condition you received it. Please note - return shipping will be paid by the buyer. We accept PayPal payment only. Payment must be received within 2 business days of auction closing Please make sure your paypal and ebay address is correct. Or not, please correct it before payment.