Pages 66 84 in textbook 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 Water milk blood and saliva Gases are also considered fluids air helium and ozone ID: 616004
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Slide1
Pressure and Fluids
Pages 66 – 84 in textbook.Slide2
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?Slide3
Water, milk, blood and saliva
Gases are also considered fluids: air, helium and ozone.
What are some examples of fluids?Slide4
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.Slide5
Is toothpaste considered a fluid? What about sand?
Odd FluidsSlide6
Non-Newtonian Fluid on a Speaker Cone - YouTube
Non-
newtonian
fluids.Slide7
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:Slide8
The result of a FORCE applied in a PERPENDICULAR fashion to a surface.
PressureSlide9
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?Slide10
If surface area increases = Pressure decreases
If surface area decreases = Pressure increases
Surface area and PressureSlide11
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?Slide12
Bill Nye: The Science Guy - Pressure - YouTubeSlide13
Bed of Nails - Cool Science Experiment - YouTubeSlide14
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.Slide15
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 –
The DEPTH of the object in the fluid.
2.
The DENSITY
of
the fluid.
How density affects pressure.Slide16
Liquid Pressure - YouTubeSlide17
The PRESSURE depends on:
The number of particle collisions, with each other or with the sides of the container.
Factors that affect the number of collisions:
Number of particles
Temperature – higher temperature, more collisions
Volume of fluid
Pressure exerted by a
compressible
fluidSlide18
Gas volume and pressure - YouTubeSlide19
Volume increases – Pressure decreases
Volume decreases – Pressure increases
Pressure-Volume Relation ( Kinetic Molecular Theory ) - YouTube
Pressure and the volume of a compressible fluid.Slide20
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 PressureSlide21
Real World: Heart Rate and Blood Pressure - YouTube
Pressure and the Human body.