Can air be compressed to 50,000 psi?  If no, what IS the highest compression ever achieved?
457996
Air is oxygen and nitrogen and that those pressures would react to form nitrous oxide or something along those lines.  People have accidentally created very high pressures, for example in welding one can trap high pressure gas in the weld which can cause the weld to crack.  Another case is certain metals when used in nuclear reactors form gas in the millions of psi range (but in very tiny amounts), again leading to cracking.
313719
First off, I'm assuming you mean breathing through a scuba regulator or snorkel.  Otherwise, I'm impressed. ;)\n\nWater, because the molecules are more dense than air, can transmit the compression wave of sound better, which would be why you can hear all sounds better.
192080
Is it within a vacuum?\n\nIf not, and if through your above given conditions resulted in air being compressed or what have you then I guess it would.
554878
look at grainger.com for a dual action air cylinder, (probably 1/2" diameter x 6" stroke), also look for a manual control valve.\nadd an air compressor and it's almost built for you.\n\nmake sure to add some guards as the air cylinder will deliver at least 500 lbs force
985658
So living things can breath. Without air pressure we would not be able to breath.The air is thinner up in the atmosphere.Down here the air is Thicker and more dense then up there that's how we can live,with air pressure.With too much pressure or to little we could die.With too much pressure we could implode. Or too little pressure we could explode (I don't know how that would be possible but I think it's right) .That sounds funny that we would explode with too little
1145988
It is filled with air.  It has a circumference of 27-28 inches with a weight of 14-16 ounces.  It should have the air pressure of 8.5 to 15.6 PSI.
479939
No such utility exists.\nAll compression must be done server side.
725940
An air compressor is a machine, usually made up of a piston connected to a crankshaft and moving in a valved cylinder (a mechanism similar to a piston engine), that takes in atmospheric air and compresses it to a higher pressure. The output, compressed air, may be stored in a pressure tank or may be used directly in air tools, dust-removal nozzles, paint sprayers, or to inflate tires (among many other uses). The compressor requires a source of mechanical power to operate. Probably the most-used type is a unit consisting of electric motor, compressor and tank with pressure gauge. See the ref. for a description of how they work.
1019328
A gas cannot be compressed by any amount of pressure into its solid phase unless the temperature is below the triple point temperature. For nitrogen (the main component of air) this is -210 C, so no amount of compression will achieve this at room temperature.
571501
u will find lot of papers regarding air compressor in this site\nhttp://air-compressor-guides.com/
410398
The partial pressure of O2 at 10 000 feet altitude.   Well, the air pressure at sea level is about 100 kilopascals.   At 10 000 feet it's about 70 kilopascals.   About a fifth of the air is oxygen so the partial pressure of O2 up there is about 14 kilopascals.
722552
5 psi\n\nIt just seems like more at 30,000 feet.
501303
No airplane, no matter how well built, is entirely air tight.  A bit of air leaks out slowly through many points and therefore the plane needs a mechanism to keep the pressure up so we can breathe inside.  \n\nThe air pressure inside the airplane is generated by a compressor.  As airplanes get older, the compressors don't work as well and thus take time to adujst the pressure in the cabin, and thus why you can feel the difference in your ears.
290218
Let me ask you a question:\nNormal Air Pressure is 14.7 pounds per square inch. So if i take a book sized square card say 5 inches on a side:\n\nIf i weigh this card flat face up, will it weigh 300 pounds more than if I weigh it sideways? you know from experience, that it isint so. but why?\n\n\nThe answer to both these questions, lies in the fact that air pressure DOES NOT act downwards. It is equal in all directions. \n\nIn fact, there is an experiment conducted to teach airpressure to kids: fill a glass with water till the brim, place a card over it so that the card touches the surface of water, now overturn the glass and the card does not fall off even with the weight of water on it. pictures here:\nhttp://www.stevespanglerscience.com/experiment/00000058\n\nin this experiment airpressure actually acts upwards!.\n\njust because you are sitting under a roof, the air pressure acting on you does not reduce. the air around you is being squeezed inwards by the air outside your house, which is being pushed downwards by all the air above it.\n\nInfact airpressure does not contribute to your weight at all becase it is pushing you upwards as well as downwards with equal force.\n\nSo you weigh the same indoors outdoors, flat side up, or sharp side up
511368
It is possible to compress all gases, liquids, and solids. It is simply a fact that liquids take much more pressure than gases, and solids much more than liquid. The reason for this is the spacing between atoms. In gases, there is a lot of spaces between atoms, so it only takes a little pressure to close these spaces, and hence pressurise the gas. Obviously, with liquids such as water, the gaps are FAR smaller, so there is much less room for the atoms to move into, so it needs a MUCH, much higher force to pressurize it.\n\nYou would also need to take temperature into account, because as the temperature of a gas/liquid/solid increases so does the size of the spaces between atoms, and thus a lower force is needed to pressurize the substance.\n\nSo the answer to your question is that yes, there IS a presuure at which it would be possible to pressurize water, but it is going to be extremely high, and will vary depending on several other factors
827547
When you say 'compression efficiency' I think you probably mean 'isothermal efficiency'.\n\nWhen air is compressed part of the work input is used in needlessly heating the air. The ideal, but unattainable, minimum work input will occur when compression is isothermal (i.e. when it takes place at constant temperature).  The efficiency of any real compression process is thus measured against this ideal and is called the 'isothermal efficiency'.\n\nIsothermal efficiency = (isothermal work input)/(actual work input)
898517
OK if you mean water only I assume that you require to dry out compressed air lines.  This is done by passing the air through an air drier as the air is cooled the water is separated and discharged to atmosphere or drain.  This is one method I am not sure about others.