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fluid

(Encyclopedia)fluid, any substance that is able to flow. Of the four states of matter, only a solid is not a fluid, since it has a definite shape that is not readily changed. Any liquid, gas, or plasma is classed a...

Parisi, Giorgio

(Encyclopedia)Parisi, Giorgio, 1948–, Italian physicist, Ph.D. Sapienza University of Rome, 1970. Parisi is Professor of Theoretical Physics at Sapienza University....

Addams, Charles Samuel

(Encyclopedia)Addams, Charles Samuel, 1912–88, American cartoonist, b. Westfield, N.J. Beginning in 1932, Addams's work appeared regularly in the New Yorker, to which he eventually contributed more than 1,300 car...

gravitation

(Encyclopedia)gravitation, the attractive force existing between any two particles of matter. The term gravitygravity is commonly used synonymously with gravitation, but in correct usage a definite distinction is...

Eight, the

(Encyclopedia)Eight, the, group of American artists in New York City, formed in 1908 to exhibit paintings. They were men of widely different tendencies, held together mainly by their common opposition to academism....

Cohen-Tannoudji, Claude Nessim

(Encyclopedia)Cohen-Tannoudji, Claude Nessim, 1933–, French physicist, b. Algeria, Ph.D. École Normale Supérieure, Paris, 1962. He has continued his research at the École Normale Supérieure, and was a profess...

silver nitrate

(Encyclopedia)silver nitrate nīˈtrāt [key], chemical compound, AgNO3, a colorless crystalline material that is very soluble in water. The most important compound of silver, it is used in the preparation of silve...

litmus

(Encyclopedia)litmus, organic dye usually used in the laboratory as an indicator of acidity or alkalinity (see acids and bases). Naturally pink in color, it turns blue in alkali solutions and red in acids. Commonly...

Kendall, Henry Way

(Encyclopedia)Kendall, Henry Way, 1926–99, American physicist. A professor at the Massachusetts Institute of Technology, Kendall won the 1990 Nobel Prize in Physics with Jerome Friedman and Richard Taylor for a s...

Moronobu

(Encyclopedia)Moronobu (Hishikawa Moronobu) hēshēkäˈwä mōrōˈnōbo͞o [key], c.1618–c.1694, Japanese painter and color-print designer of the ukiyo-e school. He began his career as an embroiderer. His first...