b) A thermos flask keeps hot liquid hot and cold liquid cold for quite a long time ? give reason
pls be quick guys
Answers
Answered by
5
Answer:
because in between the outer layer and inner layer of thermo flask is vacuum which separates them and since vacuum has no air so it doesn't let the outer atmosphere to come in contact with the inner part . So when we keep hot liquid inside it , it remains hot and the same with the cold liquid
Answered by
2
Answer:
Explanation:
The flask is made up of glass which is a bad conductor of heat. Hence heat does not flow by conduction. Since there is vacuum between the walls of the bottle, flow of heat by convection is also ruled out. Due to the silvering of the walls heat is not lost by radiation.
Similar questions