ef152-lec-4-3 - Module 4, Lecture 3 States of Matter State...

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EF 152 Spring, 2009 Lecture 4-3 1 Module 4, Lecture 3 Properties of Fluids: hydrostatics States of Matter Gas Liquid Solid Shape Volume State Fluid: substance not resistant to action of ________ forces. Fixed or Variable? EF 152 Spring, 2009 Lecture 4-3 2 Density Density (mass density) V M = ρ Specific Gravity: Ratio of mass density to mass density of _________ The specific gravity of steel is 7.85. What is the weight of a 22 inch diameter steel wrecking ball? EF 152 Spring, 2009 Lecture 4-3 3 Pressure A F p = SI unit: pascal (Pa) = 1N/m 2 A football coach pumps his moped tires up to a pressure of 80 psi. If the combined weight of the coach and his bike is 480 pounds , what is the contact area of the tire with the ground? EF 152 Spring, 2009 Lecture 4-3 4 Pressure in Fluid at Rest • Pressure same in all ________ • Pressure acts ___________ to any solid surface it touches Pressure variation with depth 0 p gh p gh p + = = Hoover Dam holds back a height of 576 ft of water. What is the pressure at the base?
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ef152-lec-4-3 - Module 4, Lecture 3 States of Matter State...

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