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22 Cards in this Set
- Front
- Back
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The equation for pressure
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Pressure=force/area
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A substance that takes the shape of its container is a
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fluid
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The reason a town has a water tower is to give the water
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pressure
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The upward force that a wing experiences as a plane flies is called
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lift
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Air pressure decreases as altitude
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increases
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Standard atmospheric pressure at sea level is
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*14.7 pounds/square inch
*101 kilopascals * 1 bar |
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Race cars often have a spoiler to provide
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downward force
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The standard SI unit of force is the
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newton
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Says that when you apply a force to a fluid the pressure increases throughout the fluid
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Pascal's principle
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The pressure below a wing is greater than the pressure above a wing because the air is moving
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slower below the wing
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Both are fluids
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*liquids
*gasses |
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Standard SI unit of pressure is the
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pascal
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The kilopascal is equal to
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1,000 pascals
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A hydraulic system produces a large force by applying a pressure over
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a larger area
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The faster a fluid moves the lower its pressure is
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Bernoulli's principle
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What determines the amount of pressure you feel if you are sitting on the bottom of the lake?
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How deep the lake is.
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The weather is usually clear when we have
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high pressure
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Pascal's principle
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*pressure increases thoughout 2L bottle when it is squeezed
*a hydraulic jack used to lift a car |
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Bernoulli's principle
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*paper rises when you blow across the top of it
*the shape of an airplane wing that allows the plane to fly *a balloon floating above a blowing fan |
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Examples of fluids
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*water
*air *helium *oxygen *oil |
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Explain how a woman in high heels can exert the same pressure on the floor as an elephant.
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The woman's weight is spread out over a small area so the pressure is high. The elephant has a lot more weight but it is spread out over a much larger area.
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Describe a demonastration form class and EXPLAIN how is shows the power of atmospheric pressure.
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*balloon in a flask
*can crush *vacuum pump *break stick |
