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398 Topic Pages Found in Physics
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Open Absorption

In physics, taking up of matter or energy of one substance by another, such as a liquid by a solid (ink by blotting paper) or a gas by a liquid

Open Acceleration (Mechanics)
Acceleration (Mechanics)

change in the velocity of a body with respect to time. Since velocity is a vector quantity, involving both magnitude and direction, acceleration is

Activation energy

in chemistry, minimum energy needed to cause a chemical reaction . A chemical reaction between two substances occurs only when an atom, ion, or


Bonding agents are called adhesives or glues. They may be made from natural substances or artificial materials. They bind together metals, wood,

Open Aerodynamics

study of gases in motion. As the principal application of aerodynamics is the design of aircraft, air is the gas with which the science is most

Open Aeronautics

Science of travel through the Earth's atmosphere, including aerodynamics, aircraft structures, jet and rocket propulsion, and aerial navigation. It is

Open Alembert, Jean Le Rond d', 1717-1783
Alembert, Jean Le Rond d', 1717-1783

French mathematician, encyclopedist, and theoretical physicist. In association with Denis Diderot , he helped plan the great Encyclopédie , for which

Open Alternative energy
Alternative energy

Although it consists of just 5 percent of the world's human population, the United States consumes the greatest share, 25 percent, of the world's

Open Alvarez, Luis W., 1911-1988
Alvarez, Luis W., 1911-1988

Place : United States of America Subject : biography, physics US physicist who won the 1968 Nobel Prize for Physics for developing the liquid-hydrogen

Open Ampère, André-Marie, 1775-1836
Ampère, André-Marie, 1775-1836

Place : France Subject : biography, physics French physicist, mathematician, chemist, and philosopher who founded the science of electromagnetics