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Questions and Answers
What is viscosity a measure of?
What is the unit of viscosity in the International System of Units (SI)?
What is the effect of increasing temperature on the viscosity of a fluid?
What is one of the medical applications of viscosity?
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What is the name of the law related to the viscosity of a fluid?
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What is the terminal velocity of a sphere falling in a fluid?
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What is the formula for the viscosity force of a sphere falling in a fluid?
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What is the purpose of this experiment?
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Study Notes
Experiment: Viscosity of Liquid
- The experiment aims to determine the viscosity of a medium using a small sphere falling with a constant velocity.
Viscosity: Definition and Units
- Viscosity is a measure of a fluid's resistance to flow and deformation under stress.
- It is a fundamental property of fluids that determines how easily they move and their ability to transfer momentum.
- The units of viscosity depend on the system of units used:
- In the International System of Units (SI), the unit of viscosity is the pascal-second (Pa s).
- In the British system of units, it is the poise (P) or centipoise (cP).
Factors Affecting Viscosity
- The factors that affect the viscosity of a fluid include:
- Temperature: generally, an increase in temperature decreases viscosity.
- Pressure: generally, an increase in pressure decreases viscosity.
- The presence of impurities: increases viscosity.
- The size and concentration of particles in suspensions or solutions: generally, an increase in size and concentration decreases viscosity.
- Intermolecular forces: greater intermolecular forces increase viscosity.
Medical Applications of Viscosity
- Viscosity has several medical applications, including:
- Measurement of blood viscosity, which can be used to evaluate the risk of cardiovascular disease, stroke, and other circulatory disorders.
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Description
Measure the viscosity of a medium using a falling sphere and learn the definition and units of viscosity, a fundamental property of fluids.
