What is the maximum acheivable amount of vacuum in inches?
956075
The maximum "inches of vacuum" would be roughly equal to the barometric pressure outside, around 29.92 inches for a typical day (1 atmosphere here on Earth).  This would be, for example, how far the mercury would rise if you pull air out of the top of a tube whose lower end is in a pool of mercury.\n\nAnother way which is commonly used in science and engineering is to measure in "inches of mercury" or "mm of mercury" (torr).  In this case, you pull a near perfect vacuum inside the tube (by sealing the end, filling it with mercury and flipping it over) and see how high the mercury is when it stops draining out.  A perfect vacuum in this case would be zero inches.  It all depends on whether you're measuring the vacuum inside the tube or outside!
519173
Actually, There is no such thing as a true vacuum...Anywhere.\nA true vacuum has never been created, anywhere, where the atomic count is zero.\nThere is always atomic content left to fill the "vacuous" space. No one has ever been able to creat a true vacuum.\n(exerpt from a previous answer)\nContrary to popular belief, empty space is not empty, and it is certainly not a vacuum. \nresearch it, its true.\n"Empty" space actually contains an average of 1 hydrogen atom for every 32 cubic centimeters of space, this data is per NASA.\n\nIn our own Milky Way, space is more dense with 1 hydrogen atom for every 1 cubic centimeter.\n\nThe universe is probably scheduled for a "Big Crunch". It is possible that black holes are the catalyst behind the big crunch, which is the end version of the big bang. Once all of the black holes in existence in our universe collect enough matter and energy, they could theoretically combine gravitationaly to create one massive black hole that simply repeats the big bang over and over.\n\n\nOne day the misinformation of space, or anything else, as a vacuum will finally die out.\n\n\nspread the knowledge
1048619
There is no air in vacuum.
429583
a suctionpump doesn't help\nbelieve me ... \n\nfor a short moment it's bigger\nbut no lasting result
651326
approx:200 per sqr.inch.
961497
Use the box top the magneto came in ,if you dont have that its .025 of an inch
217674
3 feet or 36 inches or 0.9144 meters
227718
to my surprise, there appear to be many sites that sell such equipment; check it out:\nhttp://www.google.com/search?client=safari&rls=en&q=vacuum+bellow+gatan+ion+mill&ie=UTF-8&oe=UTF-8
1017318
TRY TO FREE UP SOME SPACE
778628
If you subtract the 0.3 sq. inches you will get the minimum.\n50.25 - 0.30 = 49.95 sq. inches\n\nAnd if you add the 0.3 sq. inches you will get the maximum.\n50.25 + 0.30 = 50.55 sq. inches
565741
the number that can be reachable tha most?
1039285
You are the one million and twoth person to ask that question....\n\n(5 to 6 inches is about right.)
1046190
vaccum seal and freeze... you want to minimalize all air exposure to avoid freezer burn
408174
THERE IS NO SUCH THING AS A TRUE VACUUM... PERIOD!\n(exerpt from a previous answer)\nContrary to popular belief, empty space is not empty, and it is certainly not a vacuum. In fact, a true vacuum has never been created, anywhere, where the atomic count is zero.\nresearch it, its true.\n"Empty" space actually contains an average of 1 hydrogen atom for every 32 cubic centimeters of space, this data is per NASA.\n\nIn our own Milky Way, space is more dense with 1 hydrogen atom for every 1 cubic centimeter.\n\nOne day the misinformation of space as a vacuum will finally die out.\n\nSo in addition to the principle behind Newtons 3rd law, there is actually atomic content providing a small but still resistive force to the SLV thrusters.\n\nspread the knowledge
985302
SAFEST?  THAT BE 0.00 INCHES
1043677
A vacuum is a volume of space that is substansively empty of matter, so that gaseous pressure is much less than standard atmospheric pressure. The root of the word vacuum is the Latin adjective vacuus which means "empty," but space can never be perfectly empty. A perfect vacuum, known as "free space", with a gaseous pressure of absolute zero is a philosophical concept with no physical reality, not least because quantum theory predicts that no volume of space is perfectly empty in this way. Physicists often use the term "vacuum" slightly differently. They discuss ideal test results that would occur in a perfect vacuum, which they simply call "vacuum" in this context, and use the term partial vacuum to refer to the imperfect vacua realized in practice.
1063108
From one inch to 3/4  depending on length less than 500 feet and the demand for air at the station\n\n...\nno