| Fluids: What are they? (7.1) | Fluids: Characteristics (7.2) | Fluids: Flow rate and viscosity (7.3) | Fluids: Controlling fluid flow (7.6) |
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Fill in the blank:
A fluid is a substance that can __________ and has no ______ ____________
A fluid is a substance that can FLOW and has no FIXED SHAPE
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What are the two types of fluid patterns / flow?
Laminar and turbulent flow
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what has a higher viscosity: helium or milk?
milk
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T or F; Fluid dynamics is the study of how fluids behave, both at rest and in motion
F:
Fluid dynamics is the study of how fluids behave in motion |
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What are the two types of fluids?
liquids
Gases |
What is the difference between liquids and gases?
Liquids do not have a fixed shape, but do have a fixed volume when changing containers
Gases do not have a fixed shape or a fixed volume when changing containers |
What can be done to a fluid to decrease the fluid's viscosity?
increase temperature
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________ is the study of the flow of air around objects
A) Hydrodynamics B) Fluid mechanics C) Fluid dynamics D) Aerodynamics
Aerodynamics
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Why is salt pouring out of a container NOT a fluid?
It has a crystalline structure
Solids form piles when poured, fluids do not |
An object that fluids flow over smoothly, with little turbulence, is said to be ___________?
Streamlined
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It takes 5 seconds for 10mL of water to come out of a faucet. What is the flow rate?
NEED CORRECT UNITS
10mL/5s = 2mL/s
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A person studying aerodynamics would most likely work on which of the following projects?
A) determining what factors affect the surface tension of droplets of liquid metal B) modelling the motion of water flowing over a dam C) Identifying factors that cause strong winds
C) Identifying factors that cause strong winds
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Which of the following situations most likely involves laminar flow of a fluid?
a) a hurricane b) water coming out of a fire hydrant c) air coming out of a popped tire d) blood flowing through a blood vessel with no plaque
d) blood flowing through a blood vessel with no plaque
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My molasses is flowing too slowly from its container. Name 2 things I can do to make it come out quicker.
increase the temperature
increase the pressure (squeeze or hit it) increase the size of the opening |
what is 1 way people control the flow of fluids in the environment. Identify 1 positive and 1 negative effect of your example.
Dams
positive: clean energy, stores water, controls floods in areas we don't want them negative: loss of land (flooding), can damage fish populations, stagnant water causing bacterial growth, release of chemicals from land into water |
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________ explains why water surface tension exists
Cohesion
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Why is plaque buildup in our blood vessels bad (talk about the fluid pattern / flow)?
What can it lead to and why/how?
causes turbulent flow (we want laminar).
can lead to heart attack or stroke because of the buildup of pressure of blood behind the plaque, which can cause the plaque to break free and obstruct a smaller blood vessel |
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