week8-2 - Pascals Principle What happens inside a fluid...

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Pascal’s Principle What happens inside a fluid when pressure is exerted on it? Does pressure have a direction? Does it transmit a force to the walls or bottom of a container? Any change in the pressure of a fluid is transmitted uniformly in all directions throughout the fluid.
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Boyle’s Law Boyle discovered that the volume of a gas is inversely proportional to the pressure. Boyle’s Law : PV = constant If the pressure increases, the volume decreases. P 1 V 1 = P 2 V 2 At higher altitude, the air density become smaller, i.e. larger volume, the air pressure become smaller. This is the reason of the balloon inflation.
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Archimedes’ Principle The average density of an object compared to a fluid determines whether the object will sink or float in that liquid. The upward force that pushes objects back toward the surface in liquids is called the buoyant force . Archimedes’ Principle : The buoyant force acting on an object fully or partially submerged in a fluid is equal to the weight of the fluid displaced by the object.
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consider a block submerged in water, suspended from a string. The pressure of the water pushes on the block from all sides. Because the pressure increases with depth, the pressure at the bottom of the block is greater than at the top. There is a larger force (
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This note was uploaded on 04/23/2011 for the course PHYS 214 taught by Professor Staff during the Spring '08 term at Purdue University-West Lafayette.

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week8-2 - Pascals Principle What happens inside a fluid...

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