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police power

(Encyclopedia)police power, in law, right of a government to make laws necessary for the health, morals, and welfare of the populace. The term has greatest currency in the United States, where it has been defined b...

power, electric

(Encyclopedia)power, electric, energy dissipated in an electrical or electronic circuit or device per unit of time. The electrical energy supplied by a current to an appliance enables it to do work or provide some ...

power brake

(Encyclopedia)power brake: see brake.

water power

(Encyclopedia)water power, mechanical energy derived from falling or flowing water, e.g., rivers, streams, and the overflow of dams. The wooden water wheel, long utilized for driving machinery in flour mills and fa...

reactive power

(Encyclopedia)reactive power: see power, electric. ...

resolving power

(Encyclopedia)resolving power: see telescope.

Frankenthaler, Helen

(Encyclopedia)Frankenthaler, Helen frăngkˈənthŏlər [key], 1928–2011, American painter, b. New York City. The youngest of the women who formed part of abstract expressionism's second generation, Frankenthaler...

Hayes, Helen

(Encyclopedia)Hayes, Helen, 1900–1993, American actress, b. Washington, D.C., as Helen Hayes Brown. She made her New York stage debut at the age of nine. Performances in Caesar and Cleopatra (1925), and Mary of S...

MacInnes, Helen

(Encyclopedia)MacInnes, Helen: see under Highet, Gilbert. ...

Suzman, Helen

(Encyclopedia)Suzman, Helen, 1917–2009, South African politician and anti-apartheid activist, b. Helen Gavronsky, grad. Univ. of Witwatersrand (1940). The daughter of Lithuanian Jewish immigrants, she taught at h...