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It helps to insulate the thing inside the thermo flask. The heat or coldness outside the flask gets reflected away. It might sound silly but it is true
Wiki User
∙ 16y ago
Wiki User
∙ 12y agoTo reflect heat/cold, so the liquid inside stays almost the same temperature
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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.
Why did Geisbert and Jahrling smell the flask?
Geisbert and Jahrling smelled the flask to check for any unusual or odorous smell that could indicate the presence or contamination of a dangerous pathogen. Smelling the flask is a part of their safety protocol to ensure that they are not exposed to any harmful substances.
How did Louis Pasteur disprove the spontaneous generation theory?
Louis broiled broth for 15 min. He then let it sit for one year in a swan neck flask. He noticed that some dust had accumulated in the top part of the flask. So he took a sample, form the broth inside the flask. He noticed that nothing was inside of growing in it. So he then preceded to shake the broth in the flask in such a way, that it would touch the dust at the top. He then took a sample from that and it was highly bacteria ridden.
Why is the conical flask only rinsed with distilled water in the titration procedure?
Yes. By adding water to rinse, you will be changing the concentration of the thing you are titrating, and so your calculation will be off. If you have material on the walls of the flask, just gently stir the flask and let the solution in the flask wash anything off the walls. I do not believe this is true. Once you add an amount of reactant into your flask adding more water will not change the number of moles of reactant that are present in the flask. The titrant will react in the mole ratio for that particular reaction so water doesn't play a role. You can rinse the flask and even use water to get part of a drop into your flask for a more accurate titration.
What is a vented flask used for?
its used to put oxygen or some kind of gas, through the vented part (on the side) through a tube and then finally into a jar!
Why is sliver used in the inner part of flasks?
A silver coating on the inside of a flask's inner glass container is there to reflect heat back into the liquid.
How do insulated containers maintain the temperature of the contents?
The inner part of a thermos flask is a seamless container - usually made of glass. It is blown into a mould while the glass is molten - and formed so that there is a thin layer of space between the inside and outside walls. The air between the two layers is sucked out - creating a vacuum. Since heat cannot travel well through a vacuum, the liquid inside the flask stays hot (or cold) for a long time.
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.
How does hot water becomes cold in a vacuum flask?
Its because there are contact points between the inner part of the flask and the outer part, which allows some thermal conductivity to occur.
How do you get an egg out of a bottle?
Invert the cooled flask and place it in the wire gauze without the wire gauze.adjust the egg inside the flask in a vertical position with its pointed side/part directly situated at the entrance leading to the mouth of the flask.heat evenly the wide part of the flask using low flame for a minute. The expected result is that the egf will slowly get outside the flask
How do you get a replacement part for a thermos it has failed after only 1 year?
Stanley products can be ordered website shopstanley-pmi.com
Why are group 1 metals dull on the outside but shiny on the inside?
because of high alkalinity and reactivity, these metals react with oxygen (or other gases) and form a dull layer over them. The inner part remaining protected against gases look shiny, but after sometime they also become dull.
Can you paint a CD?
Yes, but do not write on the back (shiny part)
Describe how you performed the procedure in Part 2 What if your answer should be in paragraph form third person and past tense For example Fifty milliliters of water was placed in the flask not?
Fifty milliliters of water was placed in the flask.
Why did Geisbert and Jahrling smell the flask?
Geisbert and Jahrling smelled the flask to check for any unusual or odorous smell that could indicate the presence or contamination of a dangerous pathogen. Smelling the flask is a part of their safety protocol to ensure that they are not exposed to any harmful substances.
How do you get a shiny bagon on ruby?
You have a 1 in 8,192 chance of any wild Bagon you encouter (Bagon are found in the deepest part of Meteor Falls) to be shiny.
How do you get shiny starter in SS?
First: You get to the part where you get the starter. Second: save before you open the present, briefcase, etc. Third: check its summary, and if it isn't shiny, then do step 2-3 again until it IS shiny.
