The space between the double glass walls of a thermos flask is evacuated space are silvered. The residual source of heat loss takes place by
convection
radiation from the surface
conduction through the stopper and the glass
conduction across the walls
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Discussions (8)
The answer is B... Radiation from the surface, although it is a minimal way of heat loss. But the stoper do not conduct it all as they are generally poor conductors. check anyankoha pg 52 top right side of pg.
The answer should be B because the silvered surface minimises heat loss through radiation
the question asks RESIDUAL SOURCE OF HEAT LOSS. Since convection and radiation are largely minimized by vacuum and silver walls respectively, the remaining pathway for heat loss is conduction through the stoppper and glass. Hence OPT C IS CORRECT
I was marked wrong unjustly
,Myschool fix this Idemand justice
. The answer is B not C
I was marked wrong unjustly,Myschool fix this I demand justice. The answer is B not C
