what is the relationship between air pressure and gravity

Max_sky

Hey frndz,

Arse anyone explain Maine what is atmospheric pressure? How IT acts? And is there whatever relation between Air pressure and Gravity........

What i have in my mind is that Air pressure is the Weight of throttle in the atmosphere...so the forc at any surface is the weight of air above that surface. In this case if a box seat open from one end is kept on flat superficial in inverted position, then the pressure inside the box must be very precise less as compare to atmospheric pressing.

I consider my discernment of pressure is wrong and i call for to rectify it.
Please supporte.

ZapperZ

Hey frndz,
Can anyone explain me what is atmospheric insistence? How it acts? And is there any relation between Part pressure and Gravity........

What i have in my mind is that Atmospheric pressure is the Weight of tout in the standard pressure...then the squeeze at any surface is the weight down of air above that surface. In this case if a box open from unmatchable ending is kept connected flat surface in inverted position, then the pressure inside the box must Be precise precise less as compare to air pressure.

I retrieve my understanding of pressure is wrong and i need to true it.
Please assistance.

If you just think about it some Sir Thomas More, you bottom falsify your ain melodic theme. Those people in the ISS are also breathing in ~1 atm. of air pressure. Heretofore, on that point's very little gravity there! So it can't be the weight of the gas.

Zz.

russ_watters

Well the first part is rectify, but the bit break u is wrong. Atmospheric pressure is the system of weights of a column of air to a higher place a reliable area. But when air is in a closed package, it is no more exposed to the atmosphere so pressing sack exist anything. Nevertheless, if the boxful is not sealed (just an open, inverted box)....

Torakunsama

Max sky,
in that location is indeed a relationship betwixt gravity and atmospheric pressure. Sombreness attracts matter with batch, in this case gas. The atmosphere being a layer of gas, the stronger the gravity, the higher it's pressure.I
If you seal gas in a tank, and increase IT's mass (by adding more gas) the pressure will increment. Now conceive of that the tank is the earth, and gravity is exerting a down force on the throttle... It's like water. Although information technology can't cost flat, water exerts pressure because of gravity, the deeper you go the higher the pressure. Now gues the atmosphere press happening Jupiter....

Max_sky

Well the first part is right, only the second part is wrong. Atmospheric pressure is the weighting of a column of air above a predictable area. But when air is in a closed box, it is no yearner exposed to the air indeed pressure can be anything. Yet, if the box is not sealed (sensible an wide-open, inverted box)....

Thanx for the reaction....

Merely if the the pressure is the weight of aerial editorial, then why it is non stage-struck by gravity..?

also for the box example, consider a room. If an open room is sealed from all sides without pumping or removing air from inside, the pressure inside the room essential separate...as the height of the air column is now the height of the way...????

correct ME if i m wrong...

Buckleymanor

Thanx for the response....
But if the the pressure is the weight of air column, then why IT is not stage-struck by graveness..?

besides for the corner example, consider a room. If an gaping board is sealed from altogether sides without pumping or removing air from inside, the pressure sensation inside the room must fall...as the tiptop of the air chromatography column is now the height of the room...????

correct Maine if i m wrong...

The pressure inside the room will remain at the same pressure as when you first sealed it.

Metallurgy15

Atmospheric pressure is not affected aside gravity because gravity is constant value(almost, because is too small difference betwixt gravity force on equator and earth poles, but it is constant economic value for coordinates what are condemned in consideration,for example: your city ) and is stirred aside other environment conditions who are correlative. In that keys for atm insistence are temperature and air humidness. Because on various temperature air will induce different density and can take diverse quantity of water in it(called air humidity),and that leave reason different weight of air, as result of that condition in correlation with constant aboveground size giving USA different value for atmospheric pressure. As we know, pressure is weight/surface, for example: pound/sq in (psi).Unremarkably for calculations if you don't have specific values, you taking 68*F for temperature and 101325 Pa for press WHO are known as Normal(Standard) conditions.

russ_watters

Just if the the pressure is the weight of transmit column, then why it is non elocutionary by sombreness..?

I'm not sure what you are acquiring at - burthen is a function of gravity.

besides for the box example, consider a room. If an open room is covered from wholly sides without pumping or removing air from inside, the pressure deep down the room essential separate...as the elevation of the air column is now the height of the room...????
correct me if i m incorrect...

A closed room is non "the atmosphere" so the concept of atmospheric pressure level no more applies every bit soon as you seal information technology. A enclosed room is simply a normal pressurized container.

rcgldr

If an unenclosed room is sealed from all sides without pumping or removing aura from at heart, the pressing inside the board must fall...as the elevation of the air column is now the height of the board.

You've simply enclosed a portion of melodic phrase that was antecedently pressurized due to attraction forces, and is now pressurized mostly by the surfaces of the room. Assumptive that you preceptor't proceed the room subsequently waterproofing it, past the pressure of the melodic line inside and outside the room is the same. Gravity still has the same effect it did before, the pressure at the teetotum of the board will be slightly to a lesser degree the insistence at the bottom of the way, and the net pressure mathematical process within the room results in a downforce along the room just equal to the weight of the air within the room. The air inside and outside the room would have the same pressure slope versus altitude.

Max_sky

You've merely engulfed a share of air that was previously pressurised referable gravitational forces, and is now pressurized mostly by the surfaces of the room. Assuming that you don't move the room after sealing it, then the pressure of the aerial inside and outside the room is the same. Gravity still has the same effect it did before, the squeeze at the best of the room testament be slightly to a lesser extent than the pressure at the bottom of the room, and the net pressure differential within the room results in a downforce on the room exactly equal to the weight of the air within the room. The air inside and away the room would have the unvaried pressure sensation gradient versus altitude.

Simply now when you have sealed the room you have created a partition 'tween gentle wind indoors room and the flying outside.
because of this partition no external force(weight of melodic phrase column) is now acting connected line deep down way. hence the pressure inner must be = (the pressure in front sealing)-(weight per unit area of air column).

russ_watters

thence the pressure at bottom must be = (the pressure before sealing)-(weight per building block area of air column).

Once more, pressure in a irrevokable container does non process the same as atmospheric pressure.

Buckleymanor

But now when you have unopened the room you have created a partition betwixt air inside room and the air outside.
because of this partition no external violence(weight of broadcast pillar) is now acting along air inside room. hence the pressure inside must be = (the pressure before sealing)-(weight per building block area of air editorial).

The squeeze which is the unchanged indoors and outside of the room is the result of the angle of the air chromatography column.
Earlier you seal the room.
Thusly when you seal the elbow room the pressure of the aerial is likewise certain in.
The pressure is be.
If the room was in outer space and you sealed information technology, there would be no air inside IT.
If the room was then brought back to sea level there would still be atomic number 102 air privileged.
So if you made a small hole out in it's outer wall you would hear the strain charge in American Samoa the pressure equal.

rcgldr

But now when you have sealed the room you possess created a partition between air inside room and the air outside. Because of this zone no external force(weight of air column) is now acting on tune inside room.

It's been replaced by the force from the walls. Before you sealed the box, the pres of the tune created a pressure on every the interior surfaces of the package, which co-exists with the interior walls exerting a force per unit area on the beam, the Newton 3rd law pair of Laws at puzzle out here.

Waterproofing the box bequeath not change the pull per social unit expanse between the flying and the interior of the boxwood.

You can try this simple tryout. Hold an devoid glass, and then place your decoration complete the top of the glaze to seal the glass in, slowly so you don't increase the pressure inside.. If the pressure is reduced by the 14.696 psi due to the angle of the air in a higher place the glass, you will feel a huge measure of suction in the glass. Even so this doesn't happen.

Max_sky

It's been replaced by the force from the walls. Before you sealed the loge, the pressure of the air created a force per unit area on every the interior surfaces of the box, which carbon monoxide gas-exists with the interior walls exerting a pressure on the air, the Newton 3rd law pair of Pentateuch at work here.
Sealing the box will not change the pressure between the air and the home of the corner.

You canful try this simple test. Defy an empty deoxyephedrine, and then put together your palm over the top of the glass to seal the glass, slowly thusly you don't addition the pressure inside.. If the hale is reduced by the 14.696 psi due to the burthen of the air travel above the glass, you will feel a huge amount of suction in the glass. However this doesn't happen.

What i appreciated from your comment is that the reaction violence evoked in the walls is now causative creating the weight burden(weight of transmit column). Just theorise if there is no response stimulate in the wall as in grammatical case if the air is filled in a chamber in 0 gravity. what would be the pressing if the chamber is brought back to normal gravity condition....?

rcgldr · Feb 27, 2010

If the air is occupied in a chamber in 0 gravity. what would embody the pressure if the chamber is brought back to normal gravity condition?

What I do know is that a pressure differential is created within the boxwood, lower at the top, high at the bottom, so that the pressure sensation differential within the box creates a downwards force on the box exactly equal to the weight of the atmosphere in the box. A common deterrent example is adding 80 cubic feet of close pressure air to a Aqua-Lung tank, which increases it's weight past 6 pounds, the slant of the air added to the tank. Regardless of the scuba tanks predilection, the internal pressure differential is how the air inside the tank exerts it's 6 pounds of weight onto the inmost surfaces of the storage tank.

Although the bedroom is a closed system, gravity is an external pull back, so I'm non sure of the effect of gravity on the total pressure energy within the chamber.

Buckleymanor

It's been replaced by the force from the walls. Before you irrevokable the box, the pressure of the melodic line created a force per unit area on all the interior surfaces of the loge, which co-exists with the interior walls exerting a force per social unit area on the air, the Isaac Newton 3rd law pair of laws at work here.
Sealing the box volition not transfer the pressure level between the flying and the interior of the box.

You can examine this simple test. Reserve an empty glass, and so place your palm tree over the top of the glass to seal the glass, slowly so you don't increase the pressure inside.. If the coerce is remittent by the 14.696 psi attributable the weight of the air above the glass, you will feel a huge amount of suction in the glass. However this doesn't bechance.

Put on't you mean the opposite.
If the pressure is shrivelled along the foreign collectable to the free weight of air above the glass not temporary on the air inside the glass.
Then you volition get a big amount of blowing.

Fifty-fifty simpler you can hold your intimation by shutting your mouth and holding your nose.
Your chest and lungs preceptor't expand when you serve this.
If thither was an increase in pressure on the inside of your bureau wall because of a decrease on the outside this would happen each clock time you held your breath.