MEDIUM
8th ICSE
IMPORTANT
Earn 100

Explain the following: A glass stopper stuck in the neck of a bottle can be removed by pouring hot water on the neck of the bottle.

Important Questions on Heat Transfer

EASY
8th ICSE
IMPORTANT
Concise Physics Middle School for Class 8>Chapter 6 - Heat Transfer>TEST YOURSELF>Q B

Explain the following: A cement floor is laid in small pieces with gaps in between.

MEDIUM
8th ICSE
IMPORTANT
Concise Physics Middle School for Class 8>Chapter 6 - Heat Transfer>TEST YOURSELF>Q B
Why is one end of a steel girder in a bridge kept on rollers instead of fixing it in pillar ?
MEDIUM
8th ICSE
IMPORTANT
Concise Physics Middle School for Class 8>Chapter 6 - Heat Transfer>TEST YOURSELF>Q B
A metal plate is heated. State three factors on which the increase in its area will depend.
MEDIUM
8th ICSE
IMPORTANT
Concise Physics Middle School for Class 8>Chapter 6 - Heat Transfer>TEST YOURSELF>Q B
A cubical metal solid block is heated. How will its volume change ?
MEDIUM
8th ICSE
IMPORTANT
Concise Physics Middle School for Class 8>Chapter 6 - Heat Transfer>TEST YOURSELF>Q B
Describe an experiment to show that liquids expand on heating.
MEDIUM
8th ICSE
IMPORTANT
Concise Physics Middle School for Class 8>Chapter 6 - Heat Transfer>TEST YOURSELF>Q B
State one application of thermal expansion of liquids.
EASY
8th ICSE
IMPORTANT
Concise Physics Middle School for Class 8>Chapter 6 - Heat Transfer>TEST YOURSELF>Q B
Describe an experiment to show that air expands on heating.
MEDIUM
8th ICSE
IMPORTANT
Concise Physics Middle School for Class 8>Chapter 6 - Heat Transfer>TEST YOURSELF>Q B

An empty glass bottle is fitted with a narrow tube at its mouth. The open end of the tube is kept in a beaker containing water. When the bottle is heated, bubbles of air are seen escaping into water. Explain the reason.