Physics 151: Lecture 29 Today’s Agenda. Today’s topics Fluids under static conditions, Ch. 14.1 through 14.4 Pressure Pascal’s Principle (hydraulic lifts etc.) Archimedes’ Principle (floatation). See text: 14.1. Fluids. At ordinary temperature, matter exists in one of three states
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1 N/m2 = 1 Pa (Pascal)
1 bar = 105 Pa
1 mbar = 102 Pa
1 torr = 133.3 Pa
1atm = 1.013 x105 Pa
= 1013 mbar
= 760 Torr
= 14.7 lb/m2 (=PSI)
See text: 14.2Pressure vs. DepthIncompressible Fluids (liquids)
For a fluid in an open container pressure same at a given depth independent of the container
See text: 14.2Pressure vs. Depth
Any change in the pressure applied to an enclosed fluid is transmitted to every portion of the fluid and to the walls of the containing vessel.
See text: 14.2Pascal’s Principle
W1 > W2
W1 < W2
W1 = W2
See text: 14.4Archimedes’ Principle
See text: 14.4Sink or Float?
(B) move down
(C) stay in same place
(A) move up
See text: 14.4ACT 3-BEven More Fun With Buoyancy