Could the sea/atmosphere get sucked out?

[jindivik]

here comesanother strange idea but im sure its been spoken about before so sorry if its a repeat, but imagine you have a huge pipe, like a big straw which could reach into space, and the other end was down at say..sea level or in the sea, theres more pressure down here than in space so would it be possible for the sea/atmosphere to get sucked up the pipe into space? .... (me and my friend have some strange conversations in class lol)

 

[Saiph]

Ask yourself this:<br /><br />Besides the wall of the straw, how does this change things?<br /><br />Does the water in a cup come spouting out of a straw, or even rise in the straw, by merely putting it in the cup?<br /><br /><br /><br />The answer is: No. The water in the cup doesn't budge, and neither will the atmosphere. Gravity is already holding it to earth despite the "suction" of space. <div class="Discussion_UserSignature"> <p align="center"><font color="#c0c0c0"><br /></font></p><p align="center"><font color="#999999"><em><font size="1">--------</font></em></font><font color="#999999"><em><font size="1">--------</font></em></font><font color="#999999"><em><font size="1">----</font></em></font><font color="#666699">SaiphMOD@gmail.com </font><font color="#999999"><em><font size="1">-------------------</font></em></font></p><p><font color="#999999"><em><font size="1">"This is my Timey Wimey Detector.  Goes "bing" when there's stuff.  It also fries eggs at 30 paces, wether you want it to or not actually.  I've learned to stay away from hens: It's not pretty when they blow" -- </font></em></font><font size="1" color="#999999">The Tenth Doctor, "Blink"</font></p> </div>

 

[grooble]

I had an idea like this, about water vapour rising because of being heated, up into a container on a platform in space.<br /><br />Unfeasible though for various reasons. <br /><br />As for the straw though, what if there was a Vacuum inside the straw? would it suck it up then?

 

[jindivik]

the change of pressure with a straw, say 15 cm long sticking out of a glass is miniscula compared to what the pressure is at sea level and what the pressure is in space, imagine it like your drinknig from the glass, as you suck on the straw there is a great drop of pressue what forces the liquid into your mouth....now imagine the ocean/atmoshpere being the glass & space being your mouth.......i think i saw on a program some people were up in a fire training tower & had a hose 20 metres long..whatever, one end at the top & the other in a tank of water, even though there was no pump pumping up the water through the hose, some water made it up the hose.. not very far, certainly not out of the top but it did rise up the hose a little due to atmospheric pressure

 

[CalliArcale]

It still won't make much difference. Certainly the atmosphere is not going to be sucked out. Air pressure can push water up a pipe a ways, but there is a limit to how far (and it's trivial compared to the distance to space). Gravity is more than enough to overwhelm it. <div class="Discussion_UserSignature"> <p> </p><p><font color="#666699"><em>"People assume that time is a strict progression of cause to effect, but actually from a non-linear, non-subjective viewpoint it's more like a big ball of wibbly wobbly . . . timey wimey . . . stuff."</em>  -- The Tenth Doctor, "Blink"</font></p> </div>

 

[larper]

In the first season of Star Trek TNG, Data and Riker are looking through a porthole onto the bridge of a dead ship. The bulkhead has been blown, exposing the compartment to space. Riker says:<br /><br />"They were all sucked out into space."<br /><br />Data replies:<br /><br />"Technically, they were blown out, sir."<br /><br /><br />The water in the cup does not go up the straw because your mouth is sucking it up. Instead, your mouth lowers the air pressure in the straw. The air pressure on the rest of the liquid in the cup PUSHES the water up the straw.<br /><br />Try this: Take the same cup, but put an air tight lid on it with a hole in the center to put the straw. Suck on that. How much water do you get?<br /><br />Here is another question. Take your "earth straw", but start it out in space so that it contains a vacuum. Cap both ends, and then lower one end into the ocean, with the other end out in space. How far will the water go up the big straw? <div class="Discussion_UserSignature"> <p><strong><font color="#ff0000">Vote </font><font color="#3366ff">Libertarian</font></strong></p> </div>

 

[robnissen]

"Here is another question. Take your "earth straw", but start it out in space so that it contains a vacuum. Cap both ends, and then lower one end into the ocean, with the other end out in space. How far will the water go up the big straw?" <br /><br />The air pressure at sea level is created by the column of air above sea level pushing down on it. That column of air exerts as much force as a column of water 32 (maybe 34) feet long. So water would go up the straw 32 feet and then stop.<br />

 

[larper]

Correct! <div class="Discussion_UserSignature"> <p><strong><font color="#ff0000">Vote </font><font color="#3366ff">Libertarian</font></strong></p> </div>

 

[jindivik]

ok thanks hehe i just thought it was something fun to think about... my mind wanders sometimes when im bored

 

[Maddad]

http://hyperphysics.phy-astr.gsu.edu/hbase/pman.html<br />The reason that fluid moves up a straw is that you lower the air pressure at one end, your mouth, by making a vacuum. The difference in pressure pushes the water up the straw. How far can it push the water? At sea level the air pressure is 407 inches of water, so the highest you could suck water up a straw would be about 34 feet. Since space is about a hundred miles up, you're going to suck a long time before you have any suckcess.

 

[CalliArcale]

<blockquote><font class="small">In reply to:</font><hr /><p>ok thanks hehe i just thought it was something fun to think about... my mind wanders sometimes when im bored <p><hr /></p></p></blockquote><br /><br />That's nothing to be ashamed of. <img src="/images/icons/wink.gif" /> Heck, I think that's where most of the great advances in science start out! <div class="Discussion_UserSignature"> <p> </p><p><font color="#666699"><em>"People assume that time is a strict progression of cause to effect, but actually from a non-linear, non-subjective viewpoint it's more like a big ball of wibbly wobbly . . . timey wimey . . . stuff."</em>  -- The Tenth Doctor, "Blink"</font></p> </div>