The Liquid State
Chapter Name : States Of Matter |
Sub Topic Code : 102_11_05_11_03 |
Topic Name : The Liquid State |
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Sub Topic Name : Viscosity |
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Introduction
Viscosity is the resistance to flow. Highly viscous fluids flow slowly than less viscous fluids. Viscosity is governed by laminar flow.
Pre-Requisites:
Velocity, flow, liquid
Activity:
Highly viscous fluids, like honey, paint flow slowly as compared to less viscous fluids.
Real Life Question:
Why does honey flow slowly as compared to water?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Viscosity | Viscosity is the resistance to flow in fluids. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Honey, water | Tilt a bowl of honey and a glass of water and see how much time it takes for the two to flow until the vessel is empty. |
Real life uses :
Making chocolate, glass factory
Places to visit :
kitchen
Practical examples around us
| Examples | Explainations |
|---|---|
| Glass is a fluid | Glass is melted to mould it into different shapes as at high temperature the viscosity of glass decreases. |
What you learn in Theory:
Viscosity depends on the intermolecular forces in fluids.
What you learn in Practice:
Viscosity decreases with increase in temperature.