Interested to Buy Any Domain ? << Click Here >> for more details...
Describe the Thermos Flask?
- 1 Answers
- 1553 Views
- I also Faced
- E-Mail Answers
Answer / amita sharma
Thermos Flask:-It consists of a double walled glass bottle with silvering on the inner side of each wall. The air from the space between the walls is evacuated by an air pump through a very small tube at the bottom which is sealed when the air has almost been sucked while the pump is in operation. The bottle is placed in side a metallic container, there being bad conductors of heat like cork pieces or felt pads between the two. Any substance, hot or cold, put inside the flask remains so for a considerable period as
(i)There is almost no possibility of exchange of heat due to radiation because of the silvering of inner sides of both of its walls which reflect back the heat
(ii)There is no exchange of heat due to conduction as the space between the walls is evacuated and bad conductors of heat are placed between the flask and the metal container an d
(iii)The exchange of heat due to convection is also not possible as there is no medium between the walls of the flask
| Is This Answer Correct ? | 0 Yes | 0 No |
What is neutral buoyancy?
What is master oscillator?
Why do stars twinkle? Why do planets not twinkle?
Which element has the lowest melting point?
What is the life of permanent magnet and what type of magnet is used in speakers?
Name the element which has the simplest absorption spectrum?
Explain the Gravitation and gravity ?
How is nuclear fission different from nuclear fusion?
Explain the Hard water?
What is a Coal ?
Tell me what is radium used for?
A rope-dancer holds wither an umbrella or a bamboo stick, while dancing on the rope. Why
General Physics 
