pressure and fluids pages 66 – 84 in textbook.. a substance that has the capacity to flow and...
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Pressure and FluidsPages 66 – 84 in textbook.
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A substance that has the capacity to flow and assume the form of the container into which it has been poured.
What is a fluid?
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Water, milk, blood and saliva Gases are also considered fluids: air, helium
and ozone.
What are some examples of fluids?
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Used to explain how fluids change shape.
Arrangement Of Molecules In The Three States Of Matter – YouTube
Solids, Liquids and Gases - YouTube
The Particle Model.
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Is toothpaste considered a fluid? What about sand?
Odd Fluids
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Non-Newtonian Fluid on a Speaker Cone - YouTube
Non-newtonian fluids.
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1) Compressible fluids: A fluid whose volume can change. GASES.
2) Incompressible fluids: A fluid whose volume cannot be varied. LIQUIDS.
Why are they different? Because the particles behave differently under pressure.
There are two types of fluids:
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The result of a FORCE applied in a PERPENDICULAR fashion to a surface.
Pressure
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A force is either a PUSH or PULL that changes the movement or shape of an object.
Effect of force on pressure: Force increases = Pressure increases Force decreases = Pressure decreases
What is a force?
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If surface area increases = Pressure decreases
If surface area decreases = Pressure increases
Surface area and Pressure
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Pressure is equal to the force divided by the area.
Pressure is measured in Pascals (Pa) Force is measured in Newtons (N) Area is measured in square meters (m²)
How to we calculate pressure?
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Bill Nye: The Science Guy - Pressure - YouTube
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Bed of Nails - Cool Science Experiment - YouTube
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Pressure exerted by fluids: When the fluid is incompressible, the force
exerted comes from the mass of the fluid above the object.
Pressure and Fluids, Part 2.
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Density is a measure of much matter is “packed together” in a solid/liguid/gas.
The GREATER the density, the GREATER the pressure.
SUMMARY: The pressure exerted on an object by an incompressible fluid depends on –
1. The DEPTH of the object in the fluid.2. The DENSITY of the fluid.
How density affects pressure.
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The PRESSURE depends on:
1) The number of particle collisions, with each other or with the sides of the container.
Factors that affect the number of collisions:a) Number of particlesb) Temperature – higher temperature, more
collisionsc) Volume of fluid
Pressure exerted by a compressible fluid
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Volume increases – Pressure decreases Volume decreases – Pressure increases
Pressure-Volume Relation ( Kinetic Molecular Theory ) - YouTube
Pressure and the volume of a compressible fluid.
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The atmosphere is the layer of air that surrounds the earth. This air is a mixture of gases, and it exerts pressure on everything on the surface.
We measure atmospheric pressure by using a barometer.
QUESTION: What happens to a barometer the higher one goes in the atmosphere?
Atmospheric Pressure
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Real World: Heart Rate and Blood Pressure - YouTube
Pressure and the Human body.