Question

The inner walls of a thermos flask also havea
polished surface to reflect little heat and absorb
most of it This helps to maintain the temperature
of the liquid
inside
the flask
is true or false ​

Answer 1

Answer:

Yes, thermoflask is designed to prevent the contents of the flask from losing heat.

The stopper, i.e. vacuum between double walls of thermoflask prevents heat transfer through convection.

The glass walls are silver coated because it reduces emitted radiation when they are silver coated i.e. made shiny. And we know that shiny surfaces reflects all the heat so all the heat is being reflected inside the walls and heat remains unaffected. And the thinesss of glass walls will stop heat entering or leaving the flask by conduction.

So, the flask is designed to prevent heat loss by conduction, convection and radiation.

Explanation:

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Answer 2

Answer:

The shiny surfaces prevent heat radiation and also reflect any heat energy that falls on them. The partial vacuum between the two sides of the flask reduces conduction to a very small amount and the stopper prevents heat loss by convection. The shiny sides are on both surfaces of the glass – inside and outside.

Explanation:

The thermos flask has a plastic top and a vacuum in between the double layer of the flask. These two structures help prevent heat to be lost or gained by the thermos flask through the process of convection.