MEDIUM
7th Chhattisgarh Board
IMPORTANT
Earn 100

The air between the double-layered bottles is evacuated. Explain this fact related to how a thermos flask is constructed.

Important Questions on Transfer of Heat

MEDIUM
7th Chhattisgarh Board
IMPORTANT
Science & Technology Class - VII>Chapter 8 - Transfer of Heat>Answer these>Q 3
Both the layers of the double-layered bottle are painted silver. Explain this fact related to how a thermos flask is constructed. 
EASY
7th Chhattisgarh Board
IMPORTANT
Science & Technology Class - VII>Chapter 8 - Transfer of Heat>Questions for practice>Q 1
The transfer of heat through solids is due to 
EASY
7th Chhattisgarh Board
IMPORTANT
Science & Technology Class - VII>Chapter 8 - Transfer of Heat>Questions for practice>Q 1
Which is a non-conductor/insulator of heat out of these?
EASY
7th Chhattisgarh Board
IMPORTANT
Science & Technology Class - VII>Chapter 8 - Transfer of Heat>Questions for practice>Q 1
In the following methods of heat transfer, the particles of the medium move from one place to another.
EASY
7th Chhattisgarh Board
IMPORTANT
Science & Technology Class - VII>Chapter 8 - Transfer of Heat>Questions for practice>Q 1
A good absorber of radiation energy is -
EASY
7th Chhattisgarh Board
IMPORTANT
Science & Technology Class - VII>Chapter 8 - Transfer of Heat>Questions for practice>Q 2
Heat flow by means of _____ is the fastest.
EASY
7th Chhattisgarh Board
IMPORTANT
Science & Technology Class - VII>Chapter 8 - Transfer of Heat>Questions for practice>Q 2
There is _____ between the double layer of the thermos flask.
MEDIUM
7th Chhattisgarh Board
IMPORTANT
Science & Technology Class - VII>Chapter 8 - Transfer of Heat>Questions for practice>Q 2
Good emitters of radiation energy are also good _____.