The metalwork of the Eiffel tower weighs nearly 7000 tons and is held together with 2,500,000 rivets. He got the idea when he noticed a film of fat floating in his dishwasher. Mercury is commonly used in thermometers and hearing aid batteries, while tungsten is used in light bulb filaments and for hardening metal-cutting tools. Many of the world's earliest scientists were alchemists, including Isaac Newton and Paracelsus.
Alchemists believe that it is possible to turn lead into gold.
Both are made of an iron-nickel alloy. As the earth spins, the liquid core also spins, giving rise to the earth's magnetic field. All rights reserved.