Light scattering by particles: Difference between revisions

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In [[physics]], the term '''total pressure''' may indicate two different quantities, both having the dimensions of a [[pressure]]:
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* In [[fluid dynamics]], ''total pressure'' (<math>p_0</math>) refers to the sum of [[static pressure]] p, [[dynamic pressure]] q, and gravitational head, as expressed by [[Bernoulli's_principle#Incompressible_flow_equation|Bernoulli's principle]]:
:<math>p_0 = p + q + \rho g z\,</math>
:where ρ is the density of the fluid, g is the local acceleration due to gravity, and z is the height above a datum.
:If the variation in height above the datum is zero, or so small it can be ignored, the above equation reduces to the following simplified form:
:<math>p_0 = p + q\,</math>
 
* In a mixture of [[ideal gas]]es, ''total pressure'' refers to the sum of each gas' [[partial pressure]].
 
[[Category:Pressure]]
[[Category:Fluid dynamics]]
[[Category:Gases]]

Latest revision as of 22:08, 31 May 2014

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