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Its because there are contact points between the inner part of the flask and the outer part, which allows some thermal conductivity to occur.
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Why did the water rush into the erlenmeyer flask when it was submerged in the cold water?
1. When the flask was placed into the cold water, the colder air molecules in the flask move slower, putting out less pressure. With the decrease in air pressure inside the flask, the now greater pressure outside pushes water into the flask until the pressure inside equals the pressure outside.
Why does the hot tea in a Thermos flask remain hot for a long time?
The Thermos (vacuum) flask has a double skinned glass cylinder inside. Between the two walls of the glass cylinder is a vacuum. The glass cylinder is also silvered on all inner and outer surfaces. Both the vacuum and the silvering help to prevent the rapid cooling of a hot liquid, or the warming of a cold liquid. The vacuum inhibits heat transfer by conduction. The silvering reflects the heat and inhibits the heat escaping from the flask. Thermos (often used for a vacuum flask) is a trade-name.Eventually, as anyone who uses a vacuum flask, the once hot drink will have become cool by the end of the day.
What happens to salt when it is put into cold water and stirred?
The cold water becomes salt water. The salt doesn't dissolve like sugar.
What happens when water enters a crack of a rock and freezes in it?
If it freezes just a little it becomes cold water, but if it freezes more it becomes ice.
What happens to leather in cold heat and water?
leather in the cold does not get hard. when you leave it in the cold for about 30 minutes, it becomes really cold. leather in the sun is still bendable in 30 min. it becomes hot, but not really hot. OK leather in water becomes really floppy and soft. oh yeah it is also really wet after 30 minutes in the water THIS QUESTION IS GOOD FOR SCIENCE STUFF!!!!!!!
Why can cold water in an uncapped vacuum flask still stay cold?
It will certainly not stay cold as long as if it were capped.
Why your vacuum flask cannot maintain the cold anymore?
There could be a crack or leakage that allows air to flow in or out of the flask. It may be time to replace the flask with a new one.
What is the name of the thing used to keep liquids warm or cold?
Vacuum flask.
The presence of -------------- in a thermos flask keeps the substances either hot or cold?
A vacuum is the answer.
What Vacuum flask keeps liquid at same temperature?
There is no way to permanently store heat. The most you can expect, from a high-quality vacuum flask, is to keep the liquid cold, or hot, for a fairly long time. But gradually, some heat will seep in, or out, until the temperature in the vacuum flask will be equal to the temperature of the surroundings.
Why did the water rush into the erlenmeyer flask when it was submerged in the cold water?
1. When the flask was placed into the cold water, the colder air molecules in the flask move slower, putting out less pressure. With the decrease in air pressure inside the flask, the now greater pressure outside pushes water into the flask until the pressure inside equals the pressure outside.
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 vacuum flask shiny?
To reflect radiation back, where from it is coming. So hot contains will remain hot and cold will remain cold.
What is the main disadvantage of using metal instead of glass in a vacuum flask?
becuase metal conducts heat
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 does the hot tea in a Thermos flask remain hot for a long time?
The Thermos (vacuum) flask has a double skinned glass cylinder inside. Between the two walls of the glass cylinder is a vacuum. The glass cylinder is also silvered on all inner and outer surfaces. Both the vacuum and the silvering help to prevent the rapid cooling of a hot liquid, or the warming of a cold liquid. The vacuum inhibits heat transfer by conduction. The silvering reflects the heat and inhibits the heat escaping from the flask. Thermos (often used for a vacuum flask) is a trade-name.Eventually, as anyone who uses a vacuum flask, the once hot drink will have become cool by the end of the day.
Does a thermos freeze liquid?
A vacuum flask keeps hot things hot & cold things cold. Just how it tells the difference is one of the mysteries of the scientific world !
