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What prevents mercury in the tube of a barometer from running out into the container at the bottom of the tube?
The top of a barometric tube is sealed leaving no place for air to escape. It works along the same principle as a drinking straw, but in reverse.
In a drinking straw, the sucking motion reduces the pressure of the air inside the straw to a lower level than the air outside the straw. Liquid resists changes in volume due to pressure and is drawn up through the tube due to the air pressure exerted on the surface of the liquid outside the straw.
In a barometric tube the tube is sealed at one end, trapping a finite amount of gas in the tube. The air pressure inside and outside the tube is equal, keeping the Mercury suspended at a certain level. If the pressure outside is raised, more force is exerted on the surface of the mercury outside the tube than on the surface inside. This raises the level of the mercury in the tube until the pressure of the air is equalized -- there is still just as much air in the tube, but a smaller volume at a greater pressure.
What else can I help you with?
What is unit of measure Rm used for?
how many meter are there in 450 running meter
What voltage is suitable for running a 180 kw motor?
380v 60 hz is suitable for running 180kw induction motor
How is adverb used in a sentence?
As a modifier to the verb. Sentence: "The boy was running through traffic". Using the adverb "recklessly" as an adverb: "The boy was recklessly running through traffic".
Why is running with scissors bad?
Running with scissors is considered dangerous because it increases the risk of accidental injury. Sharp scissors can easily cause cuts or puncture wounds if someone falls or trips while running. Additionally, the act of running can impair a person's ability to control their movements, making it more likely that they will inadvertently harm themselves or others. For safety reasons, it's best to walk carefully while handling sharp objects.
What is RM in pipe laying measurement units?
running metre
What company has mercury running with flowers?
Interflora
What prevents the blood running through your body when are cut?
your face stupid
What is a slogan for Mercury?
Now... running rings around Uranus!
Does the 2008 mercury sable have daytime running lights?
yes it does
Are Mercury Grand Marquis good running cars?
Yes. Mine has 180,000 miles on it and still running strong.
What prevents piggy from running and swiming?
by taking smaller time 4 ur shower and by not wasting it.
What is the value of a mercury outboard 39?
In running condition around $450
What do you do when your running out of gas?
Go to a nearby gas station and add gas, or if you cant move you can use a gas container and just put the gasoline in the container and pay normally telling the cashier that you have the gasoline in the container.
Is a 1991 Mercury Tracer supposed to have running lights?
If you mean daytime running lights, then probably not unless it's from Canada.
Ford mercury grand marquis 2003?
I have a 2003 mercury grand marquis will sputter around running 35 - 60 mph ?
Why won't my 2000 Mercury Mountaineer keep running?
There are several things that can cause your 2000 Mercury Mountaineer from running. The most common cause is a lack of fuel. You might want to start by changing your fuel filter.
What is the 15 amp drl fuse on a 1996 mercury?
daytime running lamps
