Fluids

Pascal’s Principle

Pascal’s Principle When you squeeze one end of a tube to get toothpaste out the other end, you  are watching Pascal’s principle in action. This principle is also the basis for theHeimlich maneuver, in which a sharp pressure increase properly applied to the abdomen is transmitted to the throat, forcefully ejecting food lodged there. The principle was …

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Measuring Pressure

Measuring Pressure The Mercury Barometer Figure J5-5a shows a very basic mercury barometer, a device used to measure the  pressure of the atmosphere. The long glass tube is filled with mercury and inverted with its open end in a dish of mercury, as the figure shows. The space above the mercury column contains only mercury vapor, …

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fluids at Rest

fluids at Rest Figure I5-2a shows a tank of water-or other liquid-open to the atmosphere. As every diver knows, the pressure increases with depth below the air- water interface.The diver’s depth gauge. in fact.  a pressure sensor much like that of Fig. 15-1 h.  As every mountaineer knows. the pressure decreases with altitude as one …

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What Is a Fluid?

What Is a Fluid? A fluid, in contrast to a solid, is a substance that can flow. Fluids conform to the boundaries of any container in which we put them. They do so because a fluid cannot sustain a force that is tangential to its surface. (In the more formal language of ‘Section 13-6, a fluid is a …

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