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2 cards from this section. Quick, good the night before a test.
What happens to shear stress in a fluid at rest?
Think about fluid motion—if it's not moving, what happens to forces acting parallel to surfaces?
What is gauge pressure?
Consider how we compare pressures to the atmosphere.
What is the pressure at a point in fluid when at rest?
Think about the definition of shear stress.
True or False: Gauge pressure is always higher than vacuum pressure.
Consider the definitions of both types of pressure.
A dam contains water up to a height of 10 meters. Calculate the gauge pressure at the base of the dam (assume density = 1000 kg/m³).
Use the basic formula for hydrostatic pressure.
A mercury barometer shows a height of 760 mm. Calculate the atmospheric pressure in Pascals.
Help yourself with the conversion of units and correct unit density for mercury.
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