In a thermos the heat loss is prevented by all the three possible methods...
conduction, convection and radiation.
The glass walls and the muck prevent conduction.
The double walls with vacuum in between prevent convection.
The mirrored surfaces prevent radiation.
Probably the muck had come off earlier.
Otherwise the heat will not be lost
nor will the refill fall down and break.
conduction, convection and radiation.
The glass walls and the muck prevent conduction.
The double walls with vacuum in between prevent convection.
The mirrored surfaces prevent radiation.
Probably the muck had come off earlier.
Otherwise the heat will not be lost
nor will the refill fall down and break.
Today I was wondering why my vacuum flask was not working as well cos the water was not as hot as usual.
I unscrewed the flask bottom carefully to check something but it fell as I opened it and it broke into pieces.
I could not help noticing a mud like substance with the broken pieces and was wondering what is this?
Then I Google searched and found out that a marshmallow mud like substance is placed between the layers of the flask to help insulate it.
I never knew about this before.
So I gain some knowledge even though my flask broke!
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