MEDIUM
7th ICSE
IMPORTANT
Earn 100

Why are quilts filled with fluffy cotton ?

Important Questions on Heat

MEDIUM
7th ICSE
IMPORTANT
Concise PHYSICS Middle School 7>Chapter 5 - Heat>TEST YOURSELF>Q 41
State the direction of heat transfer by way of convection.
MEDIUM
7th ICSE
IMPORTANT
Concise PHYSICS Middle School 7>Chapter 5 - Heat>TEST YOURSELF>Q 42
Why is a ventilator provided in a room?
MEDIUM
7th ICSE
IMPORTANT
Concise PHYSICS Middle School 7>Chapter 5 - Heat>TEST YOURSELF>Q 43
Why are chimneys provided over furnace in factories?
HARD
7th ICSE
IMPORTANT
Concise PHYSICS Middle School 7>Chapter 5 - Heat>TEST YOURSELF>Q 44
What are the land and sea breezes? Explain their formation.
MEDIUM
7th ICSE
IMPORTANT
Concise PHYSICS Middle School 7>Chapter 5 - Heat>TEST YOURSELF>Q 45
Why is the freezing chest in a refrigerator fitted near its top?
MEDIUM
7th ICSE
IMPORTANT
Concise PHYSICS Middle School 7>Chapter 5 - Heat>TEST YOURSELF>Q 46
Explain briefly the process of heat transfer by radiation.
EASY
7th ICSE
IMPORTANT
Concise PHYSICS Middle School 7>Chapter 5 - Heat>TEST YOURSELF>Q 47
Give one example of heat transfer by radiation.
MEDIUM
7th ICSE
IMPORTANT
Concise PHYSICS Middle School 7>Chapter 5 - Heat>TEST YOURSELF>Q 50
Draw a labelled diagram of a thermos-flask. Explain how the transfer of heat by conduction, convection and radiation is reduced to a minimum in it.