The Newton’s cradle is a device that demonstrates the conservation of momentum and the conservation of energy with swinging spheres. When one sphere at the end is lifted and released, it strikes the stationary spheres, transmitting a force through the stationary spheres that pushes the last sphere upward. The last sphere swings back and strikes the nearly stationary spheres, repeating the effect in the opposite direction. The device is named after 17th-century English scientist Sir Isaac Newton and designed by French scientist Edme Mariotte. It is also known as Newton’s pendulum, Newton’s balls, Newton’s rocker or executive ball clicker (since the device makes a click each time the balls collide, which they do repeatedly in a steady rhythm).[1][2]
Fast Shipping and Professional Packing
Through our long-term relationship with UPS, FedEx, DHL as well as a range of other world-class carriers, we can provide an array of shipping options. Our warehouse staff is highly educated to pack your items exactly as per the specifications we offer. Before they are shipped, your goods will be thoroughly examined and secured. We ship to thousands of customers every day in different countries. The fact that we're committed to becoming the biggest online retailer in the World is obvious. There are distribution centers as well as warehouses located in Europe as well as the USA.
Orders that include more than 1 item are assigned processing times according to each item.
We will inspect each and every one of the products before they are shipped. Today, the majority orders will be shipped within 48 hours. The delivery time will be between 3-7 days.
Returns
The inventory is always changing and we cannot control it completely because of the fact that many stakeholders are involved, including our factory and warehouse. The actual stock can change at any moment. Please be aware it's possible your order will be unable to fill when you have placed the order.
Our policy runs for a period of 30 days. If you haven't received your item within the 30 days period, we are not able to provide a refund or an exchange.
To be eligible for a return your item must be unused and in the same condition that you received it in. It must also be in the original packaging.
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