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Mitchell, Wesley Clair

(Encyclopedia) Mitchell, Wesley Clair, 1874–1948, American economist, b. Rushville, Ill. He received his Ph.D. (1899) from the Univ. of Chicago, where he studied under Thorstein Veblen and John Dewey…

mass-luminosity relation

(Encyclopedia) mass-luminosity relation, in astronomy, law stating that the luminosity of a star is proportional to some power of the mass of the star. More massive stars are in general more luminous…

Pickering, William Henry

(Encyclopedia) Pickering, William Henry, 1858–1938, American astronomer, b. Boston, grad. Massachusetts Institute of Technology (B.S., 1879). He taught at the Massachusetts Institute of Technology (…

United Nations Security Council

  The Security Council was constructed as an organ with primary responsibility for preserving peace. Unlike the General Assembly, it was given power to enforce measures and was organized as…

Broadcasting Glossary

addressable converterA cable television box that can be supplied with programming by a cable system, providing pay-per-view events.bandwidthThe numerical difference between the upper and lower…

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Anatomy and
Physiology: Gyri and Sulci

Gyri and SulciAnatomy and PhysiologyThe Central and Peripheral Nervous SystemsYou've Got Some Nerve!Gyri and SulciThe Control CenterSensory and Motor ControlThalamus: The Switching StationSpinal…

How Big Is a Bit?

bit: The word "bit" is short for "binary digit." A bit is the smallest piece of computer information. byte: Most computers use combinations of eight bits, called bytes, to represent one…

How Big is an Acre?

The Question: I'm trying to visualize an acre. Is it about the size of a football field? The Answer: Yes. Often an acre of land is compared to…