Why do bottles sometimes leak during airplane flights?
344544
The air pressure drops in the cabin as the plane climbs.
876701
Drinking coffee on airplanes is always kinda weird.  I'm always waiting for that air pocket.
283108
Lol..they probably have a little "pee cup" or something.  It's probably hooked into their suits so they can "relieve themselves" when they need too.  My boyfriend works on jets in the Marine Corp and he says that the pilots have something like that b/c they can't just land...especially when going cross-country. :)
779897
IT is because of something called "The Bernoulli Principle". \nThis principle states that the more you increase the velocity of a liquid or a gas, the more you decrese the pressure exerted by it. The faster and faster you go in the train, the more the air pressure that it exerts upon you is decreased. This is the same principle that explains why an airplane's wing works.
609704
I have witnessed this experience several times. I have never had a bag explode open. During takeoff, when the pressure difference between the outside and inside of the aircraft is at its greatest, the bag will deflate. All of the air inside the bag will literally go away. When reaching altitude, and the internal system balances the pressure, the bag will over-inflate. It will become very puffy for a short period of time. When descending, the bag will again become overinflated for a short time, then almost has a weightless feel to it, before becoming deflated once again. When the aircraft is back on the ground and the pressure balances, the bag of chips, provided it was properly sealed and unopened, will look just like any other bag of chips, and they are safe to eat.\n\n* Modern aircraft do utilize pressurized cabins, and while these systems maintain a remarkably steady cabin pressure, they do not always immediately match the ratio needed. This is also why your ears may "pop" when ascending/descending in an aircraft.
122974
"bred2bbroken" covered the question well.  I add one interesting tidbit to his answer.  The sensors that tell your body that you are thirsty are in your head.  With all that blood and bodily fluids moving away from your feet and towards your head (due to the absence of gravity), you do not feel thirsty.  This causes a problem during reentry.  Suddenly, you are severely dehydrated.  This can lead to lapses in judgement, etc.  Astronauts, therefore, drink a gallon of water during their final orbit.  If reentry has to be delayed, due to adverse weather conditions or whatever, then they have to orbit again.  Guess where all that water goes?  :)  So, they make one pass around, which takes a little over an hour, and then they have to chug a gallon of water again!  :)
1098146
If the air inside the bottle was heated first, by boiling water or even a piece of burning paer dropped inside, the air inside the bottle expands because of the heat.  As it cools, the air takes up less space and whatever object is covering the opening of the bottle is sucked in by a vacuum effect.
169839
The chemical reaction to 'bond' two substances requires oxygen and the tube is "sealed" to keep most air out. It is not totally air tight however because if you let it go to long it will dry out in the tube. Also a little does stick to the inside but you never know it because you just assume the tube is empty and throw it out.
504778
something is leaking. could be the inlet lines or the outlet. also the seals on the pump itself. If the leak is smaller then that you could be measuring changes in atmospheric pressure
336478
I'm pretty sure they have oxygen tanks on board or they might have an intake valve somewhere outside the plane for the few oxygen atoms floating around up there but the oxygen already in the cabin from take-off should be enough for the flight itself.
1160469
That's news to me and I'm not sure it isn't an old wife's tale.\n\nDo they really?\n\nLogically, it would probably have something to do with air pressure. Air pressure in a storm actually falls away quite dramatically, despite the impression you get from strong winds. The seal would maintain the pressure inside a bottle while the contents of an unsealed bottle would not have that protection and be less stable under lower pressure. The mix of denser and lighter materials in milk would be more likely to settle and separate due to gravity if it was under less pressure, I suppose.
1131287
ALL AIRCRAFT TOILETS ARE SIMILAR TO THE TOILET AND GREYWATER TANKS IN AN R.V.  AFTER EACH FLIGHT WHEN THE AIRPLANE IS SERVICED, THE SEWAGE TANK IS DRAINED AND WATER IS SERVICED.\nMODERN AIRCRAFT DESIGNED IN THE LAST 20 YEARS USE A VACUMN SYSTEM TO FLUSH FOR WATER CONSERVATION, AND A MAJOR WEIGHT REDUCTION.
349715
It's an empty metallic cylinder to get samples of water (from the sea). The cylinder is lowered on the water open. When it is at the desired depth, a "messenger" is droped from the ship down the cable. When the messenger impacts the bottle it releases a mechanism that closes the bottle with a sample of water inside.
1511
Contrails are caused by water in the exhaust of jet engines and then freezing in the upper atmosphere.  It's basically the same thing as a cirrus cloud.  High performance airplanes can make white trails off their wingtips or on top of their wings which is caused by low pressure which in turn reduces the amount of water that is naturally in the air that the air can hold and it forms a cloud.  An interesting side note is that long contrails = high relative humidity, short contrails = low realitve humidity.
989518
It is true about the temperature and air of the water but these bottles were not meant to be used after opening and when the companies were asked they said it was unsafe to do so.\n\nThe plastic is decomposing and the more use the more it leeches out and becomes deformed.
353678
The water droplets are very tiny and present a lot of surface area (compared to their volume) to the air. Rapid evaporation from the surface of the droplets cools them sufficiently to freeze.
378987
air pockets are simply put pockets of air that are at a different pressure than the sir surrounding them. thus there is a heavy movement of air in these pockets (hight pressure air moving in). this is generally caused by different air tempretures. when an airplane enters these pockets then the fast moving air collides with the airplane wings and gives it a sound shake. that is when you face turbulance.