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Q: How does the outer case of a thermos flask prevents heat loss by?
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Where do you get vacuum in the vacuum flask?

The flask works because there is a gap between the inner and outer walls of the flask. During the manufacturing process the air in the gap is extracted and the opening is sealed - creating a vacuum between the walls. Heat transmits rapidly through air - but a lot less rapidly, in fact only very, very slowly, through a vacuum. A vacuum flask not only keeps heat in, it also keeps it out. If you put iced water into a vacuum flask it will stay cold for a very long time.


Why is neon considered an inert gas?

in the case of neon, outer most orbit is completely filled .so it does combine with any other element hence


What is screw case depth?

Screw case depth is the depth at which the outer hardness of the screw is defined to. Typically tapping screws have a inner core hardness that is 'softer' than the threads, as the treads are forming (rolling/cutting) threads into another material. This outer hardness must meet a minumum hardness (eg. 45 HRC min) for a certain depth into the material, the case depth, after which the hardness drops off to the core hardness (eg. 28-38 HRC) .


Which process transfers thermal energy through a vacuum?

Radiation, e.g. in case of the heat from Sun, solar radiation transfers it to the planets and other outer space objects.


Why does an electric toaster has a shiny surface between the heating elements and the outer case?

Because shiny surfaces are poor emitters of radiation and therefore, no heat will be lost to the surroundings, just reflected off the shiny surface back to the toast.

Related questions

What is a casing deck on a submarine?

A casing deck is another term for a submarine's superstructure hull, which is the outer hull that protects the inner pressure hull. Using a thermos bottle as an analogy, the inner container where liquid goes would be the pressure hull, and the outer case which protects it the superstructure, or outer hull.


How does a flask keep hot liquid hot?

There are several types of flasks. They are all containers or vessels, usually designed to carry a liquid and often made of glass. They sometimes have a cap and are narrower at the top, but usually do not have a handle.The first distinction is flasks that are used in a laboratory. There are several types, including erlenmeyer flasks, florence flasks, round bottom flasks, distilling flasks, volumetric flasks, and others. A description of each one is listed to the left under the Related Questions links.Another type of flask is instead used to carry alcohol. It is a small container usually shaped to fit in a back pocket. It can hold any liquid but usually was designed for alcohol.See the Related Questions and Web Links to the left for more information and pictures of different types of flasks.


What is a outer case of a battery made of?

Zinc


Where do you get vacuum in the vacuum flask?

The flask works because there is a gap between the inner and outer walls of the flask. During the manufacturing process the air in the gap is extracted and the opening is sealed - creating a vacuum between the walls. Heat transmits rapidly through air - but a lot less rapidly, in fact only very, very slowly, through a vacuum. A vacuum flask not only keeps heat in, it also keeps it out. If you put iced water into a vacuum flask it will stay cold for a very long time.


What is transmission case?

its the outer aluminum or steel case the surrounds the internal componrnts


What is the case or outer shell of the computer?

Its called the case. http://www.answerblip.com/faqabout/computers


What is the broth in the flask?

In a science experiment, a broth is a liquid and a flask is a particular shape of glassware. If the method of your experiment refers to "the broth in the flask", look back over the previous steps and figure out what chemicals and liquids you added to the flask. If the goal of the experiment is to determine what the unknown broth in the flask is you may have to determine it by observing it's physical and chemical traits, be careful with the unknown broth in case it is flammable, poisonous or otherwise dangerous.


Why you use inner loop and outer loop?

Sometimes you have to use nested loops, in this case one of them is the outer, the other is the inner.


What is the thick outer case of the eye?

The sclera is the thick outer casing of the eye, in most cases it is white, however in animals it is black.


What prevents the motherboard from touching the bottom of the case?

spacers on older models...screws on newer


How does sterilisation prevent pregnancy?

In case of female sterilization, you have both the fallopian tubes ligated. This prevents the union of ovum and the sperm. In case of the male sterilization, you have both the vas diferens ligated. This prevents the appearance of the sperms in the semen. This prevent the union of the sperm with the ovum.


What is a transmission casing?

its the outer aluminum or steel case the surrounds the internal componrnts