1. he known for his theory of relativity and he invented a energy less refrigerator . 2. he discover the rubber tiers of wheel 3. # invented the two-way television telephone or videophone (1955) patented as a "photo phone signal separator network"# discovered the physical law of electrical kinetic resistance called the Zara effect (around 1930)# invented an airplane engine that ran on plain alcohol as fuel (1952)# improved methods of producing solar energy including creating new designs for a solar water heater (SolarSorber), a sun stove, and a solar battery (1960s) 4. he invented the incandescent light bulb 5. Archimedes' ScrewAccording to the Greek writer Athenaeus of Naucratis, Archimedes was commissioned by King Hiero II to design a huge ship, which could serve as a luxury, as well as a naval ship. This type of ship would be very large and would leak a huge amount of water through the hull. To fix the problem, Archimedes designed a machine which contained revolving screw-shaped blades inside a cylinder. It could be turned by hand or by a windmill. This device was placed on the deck of the ship and as the bottom blade of the tube turned, it lifted out a volume of water. The water would keep rising, till it poured out of the tube. This famous invention is still in use for irrigation purposes, all over the world.Claw of ArchimedesDesigned by Archimedes, the claw was an ancient weapon, similar to a crane, equipped with a hook that could lift ships partly out of water, and then could either drop or capsize the ship. It was built to protect the seaward portion of Syracuse's city wall. When the enemy ships approached the city walls at night, these machines were deployed and sank many ships. Another invention of Archimedes was the catapult. This was also used along with the Claw of Archimedes to drown enemy ships.The Archimedes' PrincipleThere is a widely known tale about Archimedes, which tells about the method he devised to determine the volume of an irregular shaped object. Once while taking a bath, he had noticed that the level of water in the tub rose as he got in. The story goes on that a new crown was made for King Hiero II, and Archimedes was asked to check if the crown was made of solid gold, or if some silver had been added by the goldsmith. He was also asked to solve the problem without damaging the crown. This is when he decided to use the discovery he had made in his bath; that later came to be known as the Archimedes' principle. The Archimedes' principle states that a body immersed in fluid experiences a buoyant force equal to the weight of the liquid displaced. He realized that this could be put to use, while determining the volume of the crown. To solve the quandary set before him by the king, he simply divided the weight of crown by the water displaced by it.