Effusion
From Free net encyclopedia
Effusion can refer to:
- In literature, effusion is the process of "opening the flood gates" to one's emotions, so to speak.
- In chemistry, effusion is the process where individual particles flow through a hole so tiny they must go one at a time. In this condition the diameter of the hole should be considerably smaller than the mean free path of the particles. Gases effuse, the rate at which they do so is dependent on their molecular weight. Gases composed of particles with a lower molecular weight will effuse more quickly than gases composed of particles with a higher molecular weight. Assuming two gases under the same conditions, and thus having the same energy, the speed of the particles of each gas can be found using the equation <math>E=(1/2) mv^2</math>. Thus, gas particles with a lower molecular weight will have a higher speed. This will result in more particles passing through the hole per unit time. This is why a balloon filled full of low molecular weight hydrogen will deflate, if left alone for a reasonable amount of time, faster than one full of higher molecular weight oxygen.
- In medicine, an effusion is an abnormal collection of fluid in a body cavity or space, e.g. pleural effusion.
- In music, Effusion a cappella is the name of an a cappella group at McGill University in Montreal, Canada blending the sounds of gospel and hip-hop.
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See also
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External links
This is an external link to Graham's law which provides more explanation about effusion. Note: this external link provides other or more information than the wikipage about Graham's law.