Legend has it that a young Galileo observed the swinging of a censer (incense holder) in church one day and noted that the incense burners kept swinging in time with each other as long as the chains that held them were of the same length. Galileo constructed his own pendulums and continued to experiment with them for much of his life.
Like Galileo, we have much to learn from a swinging weight on the end of a length of string! For Galileo – and for us! – the pendulum is the key to understanding a property of nature that was misunderstood for more than two thousand years: why don’t heavy things fall faster than lighter ones?
Consider a baseball, and another similar ball made of steel, the steel ball outweighs the baseball many times, it requires far more force to lift the metal ball than the baseball. Gravity’s force is far greater on the metal ball, so why doesn’t the metal ball fall faster than the baseball? Dr. Barth’s presentation swings in to action on this episode of ‘How Do You KNOW?’
Professionally packed and fast shipping
Our long-standing partnership with UPS FedEx DHL and other international carriers lets us offer various shipping options. Our warehouse staff are highly skilled and will pack your products according to our exact and precise specifications. Before they are shipped your items will be thoroughly inspected and secured. We deliver to thousands of customers every day from all over the world. This is a sign of our determination to be the largest online retailer on the planet. The distribution centers and warehouses distribution are situated in Europe and the USA.
Note that orders containing more than one item are processed according to the item.
Prior to shipment, all purchased items will be thoroughly inspected. Today, most orders will be delivered within 48 hours. The delivery time varies between 3-7 days.
Returns
The inventory is constantly changing and we cannot control it completely because of the fact that multiple stakeholders are involved, including our warehouse and factory. The stock can change at any moment. It's possible that the stocks could be depleted after the order has been made.
Our policy lasts thirty days. If it's been more than 30 days since the date you made your purchase and we're unable to offer you a full refund or exchange.
You are able to return a product if it is unused and still in the same state as when you received it. It should also be in the original package.
Related products
Uncategorized
Uncategorized
