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Questions and Answers
What effect does an increase in temperature have on the viscosity of a substance?
What effect does an increase in temperature have on the viscosity of a substance?
Density is calculated by dividing volume by mass.
Density is calculated by dividing volume by mass.
False
What is defined as mass per unit of volume?
What is defined as mass per unit of volume?
Density
A hot air balloon rises because the hot air inside it is _____ than the cooler air outside.
A hot air balloon rises because the hot air inside it is _____ than the cooler air outside.
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Match the following terms with their definitions:
Match the following terms with their definitions:
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Study Notes
Viscosity
- Viscosity measures how quickly a fluid flows.
- High viscosity means a slow and thick flow due to high friction between particles.
- Increasing temperature decreases viscosity.
- This is because heat speeds up particles, causing them to spread out and reduce friction.
Density
- Density is the mass per unit of volume.
- Heating air causes particles to spread out, decreasing density.
- Hot air balloons rise because hot air is less dense than the surrounding cold air.
- Density is calculated by dividing mass by volume.
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Description
Explore the fundamental concepts of viscosity and density in this quiz. Understand how temperature affects the flow of fluids and the rise of hot air balloons due to density differences. Test your knowledge on these crucial physical properties.
