What is Stoke’s Law and how does it relates to magma migration/movement?

Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
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What is Stoke’s Law and how does it relates to magma migration/movement?

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Stock's law is a mathematical equation which generally gives a resistance to the drag force of a spherical particles. Simply the resistance to the settlement of the particle grains in a fluid media.

Stock's law states that the settling velocity of a grain varies directly to the directly to the difference between the densities of sand and the fluid and the squre of dimeter. 

Varies inversely to the coefficient of viscosity. 

So Vs= (ρsf)g D2/18μ 

μ= coefficient of viscosity 

D= dimeter 

g= acceleration due to gravity 

ρs= density of the solid 

ρf= density of the fluid

 

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