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Questions and Answers
How is viscosity defined scientifically?
How is viscosity defined scientifically?
- As a force multiplied by a time divided by an area (correct)
- As a force multiplied by distance
- As a force divided by distance
- As a force divided by time
What are the SI units for viscosity?
What are the SI units for viscosity?
- Newton-seconds per square metre, or pascal-seconds (correct)
- Meters per second
- Joules per mole
- Kilograms per cubic meter
What does viscosity quantify in a fluid?
What does viscosity quantify in a fluid?
- Temperature and pressure changes
- Volume and density changes
- External pressure on the fluid
- Internal frictional force between adjacent layers of fluid in relative motion (correct)
What does the viscosity of a fluid measure?
What does the viscosity of a fluid measure?
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Under what conditions is zero viscosity observed?
Under what conditions is zero viscosity observed?
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What is the origin of the word 'physics'?
What is the origin of the word 'physics'?
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Which scientific fields directly contributed to the development of television and computers?
Which scientific fields directly contributed to the development of television and computers?
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What did advances in thermodynamics lead to?
What did advances in thermodynamics lead to?
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Which ancient civilizations are mentioned in relation to early astronomy?
Which ancient civilizations are mentioned in relation to early astronomy?
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What is the meaning of the Greek term 'phúsis'?
What is the meaning of the Greek term 'phúsis'?
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Study Notes
Definition and Scope of Physics
- Physics is the natural science of matter, involving the study of matter, its fundamental constituents, its motion and behavior through space and time, and the related entities of energy and force.
Importance and History of Physics
- Physics is one of the most fundamental scientific disciplines, aiming to understand how the universe behaves.
- Physics is one of the oldest academic disciplines, with roots in natural philosophy, dating back over two millennia.
Interdisciplinary Research and Applications
- Physics intersects with many interdisciplinary areas of research, such as biophysics and quantum chemistry.
- New ideas in physics often explain the fundamental mechanisms studied by other sciences and suggest new avenues of research in these and other academic disciplines.
- Advances in physics often enable new technologies.
Profession and Branches
- A scientist who specializes in the field of physics is called a physicist.
- Physics includes branches such as astronomy, which may be considered the oldest branch of science.
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