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The main heat loss in a good thermos flask, is due to heat conducted through the material. (Glass or Stainless Steel). There should be little heat lost through the vacuum of the flask.

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14y ago

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Why do the inner surface of thermos flask kept shiny?

The shiny inner surface of a thermos flask helps to reflect heat back into the flask, reducing heat transfer to or from the contents. This helps to maintain the temperature of the liquid inside the flask for a longer period of time.


Why does the outer walls of thermos flask made shining?

The outer walls of a thermos flask are often made shiny for aesthetic purposes, making the flask look more appealing. Additionally, the shiny surface can help with heat reflection, reducing heat transfer between the flask and its surroundings, thus improving the overall insulation properties of the thermos.


Vacuum is mantained in thermos flask?

A vacuum is maintained in a thermos flask in order to prevent heat transfer by conduction and convection. The absence of air molecules in the vacuum reduces the amount of heat that can be transferred through these processes, helping to keep the contents of the flask hot or cold for longer periods of time.


How does a thermos flask keep things hot using conduction and convestion?

A thermos flask minimizes heat transfer through conduction by having a vacuum insulated wall, which reduces heat loss. Additionally, the inner surface of the flask is reflective to prevent radiant heat loss. The space between the inner and outer walls of the thermos flask also prevents convective heat transfer by eliminating air movement.


Is a thermos flask also good for keeping water cold for several hours?

Yes. The thermos flask can reduce the amount of heat travelling from the surroundings to the cold water


Why is the inside of a thermos flask silver?

The inside of a thermos flask is often silver because silver is a good reflector of heat. This helps to reduce heat transfer by reflecting heat back into the flask, keeping the contents hot or cold for longer periods of time.


Why does a thermos flask have silvered glass and a vacuum?

A thermos flask has silvered glass to reduce heat transfer through radiation. The vacuum insulation minimizes heat transfer through conduction and convection, keeping the contents of the flask hot or cold for longer periods by preventing heat exchange with the surroundings.


Which mode of heat transfer is thwarted by the shiny surface in a thermos flask?

Radiation is the mode of heat transfer that is thwarted by the shiny surface in a thermos flask. The shiny surface reflects the radiant heat, preventing it from escaping the flask and helping to maintain the temperature of the contents inside for longer periods of time.


What the conduction in thermos flask?

Conduction in a thermos flask is minimized through the use of a vacuum layer between two walls of the flask. This vacuum layer prevents heat transfer by conduction, as there are no molecules present to transfer the heat. This helps to keep the contents of the flask hot or cold for an extended period of time.


How does thermoflask work?

Thermos Flask is a container that is used to prolong the temperature of a liquid. If a liquid it is hot,the thermos flask will work to make it stay hot longer. The heat will have no way to escape the flask which means the heat will stat longer, causing the liquid to stay hot longer.


How stuff works?

Thermos flask It works with a contraption in it which keeps all the heat in the bottom!


Why you create vacuum in thermos flask?

This reduces heat transport through conduction and convection.