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How does a thermos flask reduce heat loss by radiation?
Vaccum between thermos walls does NOT prevent radiation, however the other forms of heat transfer(convection and conduction) are more or less eliminated. Radiation effect of heat transfer may be reduced by applying a layer of reflective material inside the bootles - to reflect the emmision back inwards.
Is a vacuum still a vacuum if there are electromagnetic waves in the vacuum?
Yes, a vacuum is still a vacuum if electromagnetic waves are present. A vacuum is an area with no matter in it. We know that matter is anything which has mass and takes up space. Electromagnetic waves have no mass, and certianly take up no space. They're energy.
How much did it cost to make the Dyson vacuum cleaner?
Just heard an answer to this today. I can not verify if it is true. But met a man who toured the Dyson factory (he sells vacuum cleaners) and said it costs $27- I can't remember the model number, but still an incredible mark up if that is the case.
Why does water inside a thermos flask gets cooled after few days?
This is due to insulation. Inside of the Thermos the liquid remains its placed temperature longer due to the insulating either stopping heat from reaching the fluid, or by stopping heat from leaving the fluid.
How does light change speed from glass to air?
In glass, light will go somewhat slower than in a vacuum. Air is almost like a vacuum, with respect to the speed of light - some difference still exists, though.In glass, light will go somewhat slower than in a vacuum. Air is almost like a vacuum, with respect to the speed of light - some difference still exists, though.In glass, light will go somewhat slower than in a vacuum. Air is almost like a vacuum, with respect to the speed of light - some difference still exists, though.In glass, light will go somewhat slower than in a vacuum. Air is almost like a vacuum, with respect to the speed of light - some difference still exists, though.
How do you spell thermus?
The spelling is "thermos" (still a trademark name Thermos), a vacuum-insulated flask.
What did Sir James Dewar use the thermos for?
He didn't. He used a Dewar or vacuum flask. It is used to keep things hotter or colder than the surrounding ambient temperature. He failed to patent the idea and it was subsequently patented by Thermos. Thermos is still a registered trade mark in many countries, though it has been declared generic in the US.
Are there still 1908 hoover model o vacuum cleaners around still?
yes there is as i have 1 .
How does a thermos flask reduce heat loss by radiation?
Vaccum between thermos walls does NOT prevent radiation, however the other forms of heat transfer(convection and conduction) are more or less eliminated. Radiation effect of heat transfer may be reduced by applying a layer of reflective material inside the bootles - to reflect the emmision back inwards.
How do you make a vacuum bottle?
Fill it with steam and quickly close the water bottle. You want the bottle to be filled with steam. Next, put it in the freezer. The steam will turn into liquid and so there won't be any air (there still some air.)
What to do to get rid of merky water in swimming pool?
shock it, then 24 hours later brush and vacuum. if still murky, algaecide, maximum dose on bottle.
Where do I find a Brush roller for a Kenmore Upright Vacuum Model 116.39139990?
Check at sears.com under partsdirect to see if parts are still available for your machine. if not, see if there is a vacuum repair shop in your area and check with them.
Is a vacuum still a vacuum if there are electromagnetic waves in the vacuum?
Yes, a vacuum is still a vacuum if electromagnetic waves are present. A vacuum is an area with no matter in it. We know that matter is anything which has mass and takes up space. Electromagnetic waves have no mass, and certianly take up no space. They're energy.
How did people keep hot liquids hot in 1896 when traveling?
The first insulated bottle was likely designed by English scientist Sir James Dewar in 1896. In 1892 Dewar had invented a special flask still in use today and attributed to him by its name. Dewar created his insulated bottle by sealing one bottle inside another and pumping out the air between them. This created a vacuum, which is an effective insulator. Dewar never patented his invention, however. It was German glass-blower Reinhold Burger and his partner Albert Aschenbrenner, who made bottles for Dewar, who decided to market Dewar's invention. Burger and Aschenbrenner held a contest to name Dewar's device. A resident of Munich suggested the name thermos from the Greek word threm, which means hot. Along with Gustav von Paalen, Burger and Aschenbrenner formed a company to manufacture Dewar's invention and called it Thermos GmbH. Paalen, Burger, and Aschenbrenner did not register the now well-known Thermos name until 1906, the same year they met American businessman William B. Walker in Berlin. Walker learned of their invention and obtained exclusive manufacturing and marketing rights to it in the United States. The American Thermos Bottle Company was incorporated on January 31, 1907, in Portland, Maine, and set up production in Brooklyn, New York. The Thermos insulated bottle quickly gained popularity across the United States. Famous users include President Taft; explorers Lieutenant E.H. Shackelt, who took his to the South Pole and Lieutenant Robert E. Peary, who took his to the Arctic; Colonel Roosevelt on an expedition to Mombassa; Richard Harding Davis on a trip to the African Congo; Count Zeppelin, who took his up in his hot air balloon; and the Wright Brothers, who took theirs to the sky as well in the first airplane. Source: http:/www.enotes.com/how-products-encyclopedia/insulated-bottle
How much did it cost to make the Dyson vacuum cleaner?
Just heard an answer to this today. I can not verify if it is true. But met a man who toured the Dyson factory (he sells vacuum cleaners) and said it costs $27- I can't remember the model number, but still an incredible mark up if that is the case.
Is hadacol still available?
I have a bottle never been opened, no date found on bottle.
Can an engine still run withe the EGR vacuum solenoid not in working conditions?
Yes, the engine can still run with the EGR vacuum solenoid not in the working condition.
