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4.2 Notes RESISTANCE IN FLUID SYSTEMS
Resistance in Fluid Systems
Drag- the force opposing motion when a solid moves through a fluid
Drag occurs only when there is relative movement
Drag is depends on:
1) velocity of the object and/or fluid
2) size object
3) shape object
4) properties of the fluid
Bernoulli’s Principle
As the velocity of a fluid (or an object travelling through a fluid) increases, the pressure in the fluid decreases
Laminar and Turbulent Flow
Laminar flow is slow and smooth over a surface
Frictional drag is produced by the successive layers of the fluid
Turbulent flow is irregular with eddies and whorls causing the fluid to move in different directions
Changes in the pressure of the fluid produce pressure drag
Viscosity
A property of a fluid that describes the opposition to motion within the fluid
Viscosity for fluid resistance is similar to the coefficients of friction
What are some applications of viscosity?
What factors can effect the viscosity of fluids?
4.2 Lab Proficiencies
Set up a system to measure the flow rate of air through a tube
Measure the pressure and flow rate for air flowing through tubes of different diameter and length
Use pressure gauge to take pressure reading
4.2 Lab PreviewEQUIPMENT
Resistance Tube Set
Mechanical Breadboard
Support Rods with Base
Pressure Regulator
Flowmeter
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