if ur in a sealed room which is vacuum can u open the door?
473495
depends on which way the door opens.  \n\nif you have to push the door open, then you are fighting against about 14 lbs of pressure for every square inch of door.  For a standard 3' by 7' door, that's 3024 square inches, or about 21 tons of force on that door.\n\nif you can push 21 tons of air aside, you could open the door.\n\nif the door opens inwards, the latch (and the door itself) would have to be strong enough to hold back 21 tons of force.  as soon as you release that latch, the door will slam inwards quite violently, and the air will come rushing in.\n\nif the door slides into the wall, like a Star Trek hatch, then it can open and close in a vacuum quite easily.\n\n(BTW:  you won't explode in a vacuum.  your skin is quite sufficiently strong to hold your innards in.  however, you will suffocate, and all the moisture in your body will boil away - starting with your eyes and mucous membranes, leaving a withered mummified husk.)
924970
Atmospheric Pressure VS Vacuum -- which is stronger?
157673
Vacuum\n\nElectromagnetic waves are self propigating, so they do not require a medium in which to travel through.  This is how light (and other EM waves) can travel through empty space.
1001647
Make a box of strong glass or reinforced cardboard. Put the mobile inside it and use a vacuum cleaner to suck the air out of the box. Make it airtight. Thats it.
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.
840864
No do not use houehold cleaners...U can buy a can of air at any office supply and maybe even walmart use that no damage and it gets between the keys..
78615
Cant, have to open a new one.
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
1087966
Pragmatically speaking, it will take more energy to pull a vacuum on a larger volume. \nAssuming you start at the same pressure, there is more to remove from the larger volume.
697831
close the light in the house....then go to the kitchen and open the door of the fridge.....this is where the light goes...haahahahhahahahahahahahahaha
221318
An air conditioner usually brings in some air from the outside. Even if it doesn't, no room in your house is anywhere near airtight-- for example, your door has a gap in the bottom of at least 1/4 to 1/2 inch.
921628
Yes - in enclosed envioment
280229
Get a ShopVac and get a floor-mat. Wipe your feet off before you go in and put a sign on the door that says 'PLEASE WIPE YOUR FEET.' Can't get much more obvious than that.
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
1084004
An electrical discharge would create a void in a small space of air or a vacuum pump designed specifically for that purpose could also serve this purpose.\n\n  A common means of practice for this exercise would be putting the lid loosely on a mason jar and boiling it upright and when it reaches a boiling temperature (carefully) closing the lid.  As the heated particles of gas would expand when the air inside the jar cools it will suck in the little tab on the jar.  This is a result of common usage of vacuum pressure.  A complete void would require super-heating.
291307
the question is how did ya get into tha room use the same way u used 2 get in
137262
Utilize some conductor between you and the grounding point. For example, hold a key (make sure you're touching the metal part!) and touch the key to the grounding point (door knob, etc.)\n\nThe static charge you have accumulated will flow through the key, and the arc will be produced between the key and the door knob. Since you are in contact with the key, the electrons will flow freely through you, and the energy causing the 'zap' will only be between the key & door knob. You will not feel a thing.\n\nTo reduce your tendancy to develop a static charge, walk barefoot, wear cotton clothing and increase the humidity level of your living environment.\n\nTo learn more about the principles of static electricity, check out these lectures offered by professor Lewin from MIT, click the link below...