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Bernoulli's principle

(physics) the principle that in a liquid flowing through a pipe the pressure difference that accelerates the flow when the bore changes is equal to the product of half the density times the change of the square of the speed, provided friction is negligible
Word Origin
C19: named after Daniel Bernoulli
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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bernoulli's law in Medicine

Bernoulli's law Ber·noul·li's law (bər-nōō'lēz)

  1. An expression of the conservation of energy for any incompressible flowing fluid in terms of its pressure, velocity, density, acceleration, and vertical height.

  2. See law of large numbers.

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bernoulli's law in Science
Bernoulli's law
  1. A law of fluid mechanics stating the relationship between the velocity, density, and pressure of a fluid. Mathematically, the law states that P + 1/2 ρv2 = constant, where P is the pressure (in newtons per square meter), ρ is the density of the fluid (in kilograms per square meter), and v is the velocity (in meters per second). If no energy is added to the system, an increase in velocity is accompanied by a decrease in density and/or pressure. The law is directly related to the principle of conservation of energy. See also Bernoulli effect.

  2. See law of large numbers.

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