Laplace, Simon-Pierre

Laplace, Pierre-Simon (Marquis) de (1749-1827) French mathematician and astronomer whose work was pivotal to the development of mathematical astronomy and statistics. 

Laplace Pierre Simon (1749-1827) Fr. math., laid foundation of thermochemistry, theory of probability, made much use of potential partial differential equations since named after him, conducted experiments of specific heat and heat of combustion, developed ice calorimeter LaViolette Paul A. (1938 —) US. astrophys., developer of unusual subquantum kinetics and continuous creation model of the universe, and novel approach to microphysics that accounts for forces in a unified maimer Lavoisier Antoine Laurent (1743—1794) Fr. chem., discovered relation between combustion and oxygen, divided substances into elements and compounds, explained respiration, disproved phlogiston, introduced quantitative methods to chemistry... 

Laplace, Pierre Simon (1749-1827) A French professor of mathematics noted for his contribution to mathematics. Lapiace was the son of a farm iabourer who owed his education to some rich neighbours. He soived many probiems concerning the motion of the solar system. He also worked on surface tension and, with Antoine Lavoisier (1743-94), did work on the measurement of the heat produced during chemical changes. In 1822 he persuaded the French Academy to carry out experiments to measure the velocity of sound over a distance of eleven miles by firing cannons. The result confirmed his belief that when sound waves pass, the air cools as it expands and heats up as it contracts. 

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