5+-+Lyell,+Mach,+Mendeleev,+Heisenberg

Sir Charles Lyell-

Born November 14 1797 Died February 22nd 1875

He was the foremost geologist of his day and he was a British Lawyer. He wrote "The Principles of Geology" close friend of Chares Darwin. He popularized the doctrine for uniformitarianism, the idea that the Earth was formed entirely by slow moving forces sill in use today. It was the exact contrast to catastrophism. he explained the causes of earthquakes, and he endorsed geological surveys. However his mst important work was about stratigraphy, he study of glaciers.

Dimitri Mendeleev-

Born February 8th 1834-Died February 2nd 1907

Russian chemist and inventor, created the priodic table of the elements.

Ernst Mach-

Born February 18th 1838-Died February 19th 1916

Austrian, studied shockwaves and came up with the Mach number, the speed of an object moving through air or any other fluid dividd by the speed of sound. Came up with Mach's Principle that the locomotion of a rotating reference frame is determined by the large scale distribution of matter.

Werner Heisenberg-

Born December 5th 1901-Died Feruary 1st 1976

German theoretical physicist, made a foundational contribution to quantum mechanics and is best known for asserting the uncertainty principle of quantum theory. He also made important contributions to nuclear physics and quantum field theory. Won the 1932 Nobel Prize in Physics.