## Transfer of Heat - Important Terms

Class 09 FBISE Physics - Transfer of Heat - Important Terms

## Transfer of Heat - Numerical Problems

Class 09 FBISE Physics - Transfer of Heat - Numerical Problems

## Transfer of Heat - Exercise

Class 09 FBISE Physics - Transfer of Heat - Exercise

## Transfer of Heat - MCQs

Class 09 FBISE Physics - Transfer of Heat - MCQs

## Transfer of Heat - Notes

Class 09 FBISE Physics - Transfer of Heat - Notes

## How much heat is lost in an hour through a glass window measuring

Class 9 FBISE Physics - Transfer of Heat - How much heat is lost in an hour through a glass window measuring

## The concrete roof of a house of a thickness of 20 cm has an area

Class 9 FBISE Physics - Transfer of Heat - The concrete roof of a house of a thickness of 20 cm has an area

## Suggest a simple activity 2 sure connection of heat in gases not given in the book.

Class 9 FBISE Physics - Transfer of Heat - Suggest a simple activity 2 sure connection of heat in gases not given in the book.

## What is meant by convention current?

Class 9 FBISE Physics - Transfer of Heat - What is meant by convention current?

## Why transfer of heat in fluids takes place by convention?

Class 9 FBISE Physics - Transfer of Heat - Why transfer of heat in fluids takes place by convention?

## What measures do you suggest to conserve energy in houses?

Class 9 FBISE Physics - Transfer of Heat - What measures do you suggest to conserve energy in houses?

## Why conduction of heat does not take place in gases?

Class 9 FBISE Physics - Transfer of Heat - Why conduction of heat does not take place in gases?

## Explains why? a) A metal feels colder t touch than wood kept in a cold place? b) Land breeze blows from the land towards the sea? c) Double walled glass vessel is used in thermos flask? d) Deserts soon get hot during the day and soon get cold after sunset?

Class 9 FBISE Physics - Transfer of Heat - Explains why? a) A metal feels colder t touch than wood kept in a cold place? b) Land breeze blows from the land towards the sea? c) Double walled glass vessel is used in thermos flask? d) Deserts soon get hot during the day and soon get cold after sunset?

## Why metals are good conductors of heat?

Class 9 FBISE Physics - Transfer of Heat - Why metals are good conductors of heat?

## Explain the application and consequences of radiation?

Class 9 FBISE Physics - Transfer of Heat - Explain the application and consequences of radiation?

## Explain the impact of the greenhouse effect on global warming.

Class 9 FBISE Physics - Transfer of Heat - Explain the impact of the greenhouse effect on global warming.

## What is the greenhouse effect?

Class 9 FBISE Physics - Transfer of Heat - What is greenhouse effect?

## How does heat reach us directly from a fireplace?

Class 9 FBISE Physics - Transfer of Heat - How does heat reach us directly from a fireplace?

## How various surfaces can be compared by a Leslie cube?

Class 9 FBISE Physics - Transfer of Heat - How various surfaces can be compared by a Leslie cube?

## Why does a glass of chilled (frozen) water become hot after some time?

Class 9 FBISE Physics - Transfer of Heat - Why does a glass of chilled (frozen) water become hot after some time?

## Why does a cup of hot tea become cold sometimes?

Class 9 FBISE Physics - Transfer of Heat - Why does a cup of hot tea become cold sometimes?

## How does heat reach us from the Sun?

Class 9 FBISE Physics - Transfer of Heat - How does heat reach us from the Sun?

## How do thermals help birds to fly for hours without flapping their wings?

Class 9 FBISE Physics - Transfer of Heat - How do thermals help birds to fly for hours without flapping their wings?

## What causes a glider to remain in the air?

Class 9 FBISE Physics - Transfer of Heat - What causes a glider to remain in the air?

## Why does the sea breeze blow during the day? Why does a land breeze blow in the night?

Class 9 FBISE Physics - Transfer of Heat - Why does the sea breeze blow during the day? Why does a land breeze blow in the night?

## Why a balloon inflated with hot air rises up?

Class 9 FBISE Physics - Transfer of Heat - Why a balloon inflated with hot air rises up?

## What is meant by convection current?

Class 9 FBISE Physics - Transfer of Heat - What is meant by convection current?

## List the thermal conductivities of some substances?

Class 9 FBISE Physics - Transfer of Heat - List the thermal conductivities of some substances?

## Describe the users of conductors and non-conductors with examples?

Class 9 FBISE Physics - Transfer of Heat - Describe the users of conductors and non-conductors with examples?

## Derive relation for thermal conductivity of a substance?

Class 9 FBISE Physics - Transfer of Heat - Derive relation for thermal conductivity of a substance?

## How does then flow from hot to cold parts in metals so rapidly than non-metals?

Class 9 FBISE Physics - Transfer of Heat - How does then flow from hot to cold parts in metals so rapidly than non-metals?

## What is meant by conduction?

Class 9 FBISE Physics - Transfer of Heat - What is meant by conduction?

## List three names by which heat can be transferred from one place to another place

Class 9 FBISE Physics - Transfer of Heat - List three names by which heat can be transferred from one place to another place