Fluids

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Fluids

• BELLWORK in NOTES
• What does it mean to be fluid?

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TN Standards

• CLE.3202.1.8 Investigate relationships among
  the pressure, temperature, and volume of gases /
  liquids
• CLE.3202.Inq.3 Use appropriate tools and
  technology to collect precise and accurate data
• CLE.3202.Inq.6 Communicate and defend
  scientific findings

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NOTES
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Fluids

• Liquids and gases are considered fluids
• Their particles move easily
• across each other
• Around each other
• They flow ( like water flowing down a stream )

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Fluids

• Fluids vary at the rate with which they flow
• Fluids move faster through small areas than
  through larger areas, if the overall flow rate
  remains constant.
• Bernoulli Effect
• Fluid pressure
• decreases as speed
• Increases

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Viscosity

• Viscosity is the resistance of a gas or liquid to
  flow
• Thicker fluid is more viscous
• Depends on particle attraction
• Honey vs Lemonade?

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Common Examples of Fluids

• 2 oclock groups PARTNERS
• Take Notebooks
• In Notes, list 10 common fluids you can think of
• 5 should be a gas
• 5 should be a liquid

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Common Examples of Fluids

• Gas oxygen, nitrogen, carbon dioxide, carbon
  monoxide, helium
• Liquids mercury, water, honey, lemonade, olive
  oil

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Properties of Gases

• Expand to fill their containers
• Spread out easily and mix with each other
• Have low densities and are compressible
• Mostly empty space ( unlike solids liquids )

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PhET Simulation Lab Groups

• THIS WILL BE GRADED AS A LAB GRADE
• Each student turns in their own paper

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PhET Simulation Study Groups

• Go to station log into labtop
• PhET website ( google PhET 1st link )
• Search Fluids
• Choose Fluid Pressure and Flow
• Run simulation

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Label Paper

• Fluid Pressure and Flow Simulation

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Pressure tab

• Start with Pressure tab
• Fill up the hole ( choose 1st image on upper
  left )
• Drag pressure gauges to the bottom, middle, and
  top
• 1 Write down Full container of water and each
  those three pressure readings
• Example Top 101.4 kPa

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Pressure tab

• 2 Do the pressure readings increase or decrease
  as you go from the water surface to the bottom of
  the hole?
• 3 Explain why. Relate to the equation for
  PRESSURE

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Flow tab

• Go to the Flow tab
• 4 What is the initial Flow Rate ( upper left )?
• Use yellow handles on pipe to make the middle
  section more narrow
• 5 What happens to the flow of particles in the
  narrow section?
• 6 Explain why ( look in todays notes ). USE
  PRESSURE GAUGES ( 1 IN THE NARROW 1 IN THE WIDE
  PART )
• LAST THING decrease flow rate to 2000 L/s and
  observe

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Exit Pass Water Tower

• DO WITH LAB QUESTIONS
• Go to Water Tower tab
• QUESTION as the tower is filled up, how should
  the pressure change at the bottom of tank (
  increase or decrease )?
• Try it out and see drag a pressure gauge to
  bottom of tank, then turn the water on at top