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What does it mean when the straw moves up barometer air pressure?
Wiki User
∙ 10y ago
If you have taped a straw to a balloon stretched over a jar top as a simple barometer, when the straw moves up, this is a sign of high pressure (atmosphere pressing down on the balloon). High pressure usually means fine weather.
Wiki User
∙ 10y ago
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What does 29.91 in and falling mean on the barometer?
why does my wood stove chimeny not draw well when the pressure is 29.91 etc
Which type of weather often arrives with rising air pressure?
A barometer measures air-pressure (baro-meter) so a rising reading means the local air pressure is increasing. If we assume that your local gravity is constant (it usually is) then the increasing air pressure is caused by the air getting denser; more kilograms per cubic metre or pounds per pint. That could be because the air is getting colder, or because it has less water content, since making air colder makes it denser, and dry air is denser than wet air. So, a rising barometer suggests a spell of cool dry weather.A rising barometer indicates that the air pressure is rising and this is associated with clear skies with few cloud formations. Generally this will mean it is hotter than average in summer, but colder than average in winter.A rising barometer means higher pressure which means less clouds and fairer weather.
The process in which sediments moves slowly downhill mean?
Erosion.
What does rapid mass movement mean?
eather something moves in a massive amount of movement or a large amount of substance that moves fast.
Can mean effective pressure less than atmospheric pressure?
no Because any body subject is affected by the atmospheric pressure in the case of its occurrence under the pressure of what it means that the pressure for increased atmospheric pressure.
What measures a barometer with Mercury?
Maybe you mean what does a mercury barometer measure. In which case the answer is atmospheric pressure.
Does barometer falling mean measures the air temperature?
No, a barometer measures air pressure, not temperature. A falling barometer generally signifies unsettled or stormy weather coming in.
What does rapid changes in the barometer mean?
a barometer calculates changes in air pressure. so if it has a rapid change, im guessing it has just been a "rapid" change in air pressure
What does a decrease in the height of a column in a mercury barometer mean?
air pressure is decreasing
What does low pressure reading in a barometer mean?
Generally it means it is going to rain.
What does the pressure units in weather mean?
It refers to the atmospheric pressure which, in this case, is measured in inches of Mercury on a mercury barometer
What does the pressure units 30.03 in weather mean?
It refers to the atmospheric pressure which, in this case, is measured in inches of mercury on a mercury barometer
What does 29.91 in and falling mean on the barometer?
why does my wood stove chimeny not draw well when the pressure is 29.91 etc
Does a mercury barometer or aneroid barometer measure air pressure?
mercury has a sudden fall and then the barometter measure it and when i mean by fall i mean air pressure so yeah it's cool I knoe it doesn't make sense but Im just writing this anyway. Even though it's pure glorius silly you know what. I PUT THAT WORD BUT THEY WON'T LET ME POST THIS STUPID ANSWER
Does a rising barometer mean cool air or warm air?
It means higher atmospheric pressure, which is generally caused by cool air.
Mercury barometer means you will have what kind of day?
A mercury barometer is an instrument which can be used to forecast the weather. The fact that there is a barometer does not affect the weather. You need to see what the barometer shows and interpret it.
What happens when you drink through a straw?
This question points up some key misconceptions about what a vacuum is.So you put a straw in your cup of water. If you look down the straw or could look through it, you would see that the level of water inside and outside the straw are exactly the same. This is because the atmosphere is pushing down on the water inside the straw, and it is pushing down equally hard on the water outside the straw. So the pressures are equal.When you suck on the straw, you are decreasing the pressure in your mouth and lowering the pressure of the air in the top of the straw. When that happens, the force of the atmosphere pushing on the water in the glass is higher than the force of gas inside the straw. The atmosphere forces the liquid up the straw into your mouth. So, in essence, you ARE NOT sucking the liquid into your mouth, the atmosphere is pushing it there.This is easily proved by an experiment. Try drinking water from a straw that is more than 20 meters tall. It won't work. At around 20 meters, the massive column of water inside the straw would be pulled down by gravity, with a force greater than the upward force caused by the atmosphere. Even if you completely evacuate the straw with a high-powered pump the water won't make it up the straw. This is why you can't pump water out of a well that is more than 20 meters deep in the ground. Anything deeper than that and you need to use a compressor to pump air at high pressure down into the well, to force the water out (essentially make the upward pressure higher than the atmosphere alone provides), or revert to the tried and true method using buckets.Of course, a similar principle applies with underground or artesian wells. The water there is already under greater pressure and will flow to the surface if given a path.
