PHYS171_f11_lecture_43

PHYS171_f11_lecture_43 - PHYS171 Prof Arthur La Porta...

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PHYS171 Prof. Arthur La Porta [email protected] Rm 1111, IPST building (building #085) Is water a fluid? Y e s No May b 88% 8% 4% 1. Yes 2. No 3. Maybe

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Is air a fluid? Y e s No May b 100% 0% 0% 1. Yes 2. No 3. Maybe Is sand a fluid? 24% 16% 60% 1. Yes 2. No 3. Maybe
Is peanut butter a fluid Y e s No May b 52% 24% 24% 1. Yes 2. No 3. Maybe Chapter 14 Fluid Mechanics-Statics What is a fluid? • A fluid is a state of matter where atoms collide with each other but can move past each other (as opposed to a solid) • A liquid is a dense fluid in which atoms interact with each other almost continuously • A gas is a sparse fluid in which atoms collide with each other infrequently. • In a liquid the shape of the material changes in reaction to force, but the volume does not vary much. • In a gas, the shape and volume of the material is variable.

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Chapter 14 Fluid Mechanics-Statics What is a fluid? • A liquid cannot sustain shearing stress – it will give way if you push on it • It might prevent you from moving fast but it will eventually yield to force. • Imagine trying to walk in a swimming pool.
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This note was uploaded on 12/29/2011 for the course PHYSICS 171 taught by Professor La porta during the Fall '11 term at Maryland.

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PHYS171_f11_lecture_43 - PHYS171 Prof Arthur La Porta...

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