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the thermal conductivity of certain materials (e.g air)is low.
This makes exchange of heat between the inside and the surroundings difficult, thus allowing temperature to be mantained.
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What is the scientific principle of making thermos flask?
thermos flask actually works on the principle of insulator. air is trapped between 2 walls of the flask. air being a bad conductor of heat traps it between the walls. this keeps the material in the flask hot for a longer period.add. Actually, usually there is a vacuum between the two walls of the flask, for this is a better insulator than air. hence the name 'vacuum flask'.
What is Absolute error of volumetric flask?
The accuracy depends on the volume of the flask; this accuracy is standardized in standards as ASTM, CEN, GOST, etc. For important works class A volumetric flasks, pipettes and burettes are recommended. As an example see the list below.
Is the thermos flask is in use if it's silvering is removed?
If only the silvering is gone, it can still be used, but it won't be as good. However, quite often the silvering is inside the vacuum compartment; if the silvering has vanished because the glass cracked, it is very probably unsafe to use. A thermal flask works by preventing heat conduction (the vacuum layer will not conduct heat) and by preventing heat radiation (the silver layer reflects the heat back at the contents). Without the silver layer, the heat will not be reflected. The flask will still work, but will lose or gain heat faster that it would if the silvering was intact. Note: The "silvering" on older flasks may be mercury. If the envelope is cracked and the mercury evaporates, it could prove toxic. Newer flasks use aluminum.
Did rtruth explode?
no rtruth did not blowup the cued the fire works He jumped out of his shoes and ran out behind the stadium
What properties are shared by particles of all matter?
it works how it works
How stuff works?
Thermos flask It works with a contraption in it which keeps all the heat in the bottom!
What is the scientific principle of making thermos flask?
thermos flask actually works on the principle of insulator. air is trapped between 2 walls of the flask. air being a bad conductor of heat traps it between the walls. this keeps the material in the flask hot for a longer period.add. Actually, usually there is a vacuum between the two walls of the flask, for this is a better insulator than air. hence the name 'vacuum flask'.
How thermos flask works to keep thing hot or cool?
Thermos jugs are just very good insulators. Just like your house, they're designed to keep one or the other of extreme temperatures away from the inside of the jug ...and vice versa. FriPilot
How do thermos work?
A thermos works with principle of Physics that vacuum is a pure insulator of heat. Thermos is made of two containers separated by a vacuum space which acts as an insulator of heat. Also the surface of thermos will be glassy which in turn helps in reduction of heat loss.
Name the principal on which a rocket works?
name the principal at which a rockets work
What is the principal of a kaleidoscope?
works on multipal of colours
How do you eat a thermos flask?
A thermos flask is not meant to be eaten. It is designed to keep food and drinks hot or cold for an extended period of time. To use a thermos flask, simply open the lid, pour in your desired food or drink, seal the lid tightly, and enjoy your hot or cold item when desired.
What is Absolute error of volumetric flask?
The accuracy depends on the volume of the flask; this accuracy is standardized in standards as ASTM, CEN, GOST, etc. For important works class A volumetric flasks, pipettes and burettes are recommended. As an example see the list below.
Rocket works on the principal of conservation of?
newtons law of motion
How does a thermos flask keeps a hot liquid hot and a cold liquid cold?
A thermos is able to do what it does by using a several of physical and material properties to keep our hot chocolate hot and our ice tea icy. A thermos has an inner container made of glass. This container is really like one bottle inside of another bottle and sealed at the ends by melting the edges together. The air is removed out from the space between the two bottles to produce a vacuum, which is not a good conductor of heat and does a good job at slowing down the movement of heat. To slow down the other heat they coat the facing surfaces of the glass bottles with a silvery coating (like a mirror). This reflects the heat and helps slow down any losses that might get that way. They use a material like cork or rubber to make the bottle stopper and anything else that might touch the outside surface of the glass container. These materials are bad conductors of heat and slow down the heat loss. What's left is what we can see on the outside which can be metal or plastic and is the covering for the glass bottles. The idea here (with the thermos) is to slow down the movement of heat from one place to the other. So if you have hot stuff in the thermos or cold stuff in the thermos, the end result is the same. Keep heat from moving to where you don't want it to go for as long as possible. NB It's worth mentioning that modern vacuum flasks (Thermos being a trade name) are made almost entirely of stainless steel, inside and out - it doesn't shatter and is naturally reflective, although not polished to a mirror shine when used as a flask inner. Modern stoppers are also made of plastic.
What is two ways that technology works behind the scenes of every day life?
how technology works behind scenes
What were the principal works of William Shakespeare?
Some people would say that all of Shakespeare's works are "principal works". Some of his plays and poems are extremely well-known, and some less and less well-known until you get to the poems and plays practically nobody has heard of. It is easier just to look at all of his works.
