I know this is theoretical but something interesting to think about. If it did work could you shoot objects into outer space using the tube?
128244
air would rush into the empty tube and filll the vaccum and some may escape in to space but not very much.\n\nTake a straw and plug the top insert it into a glass of water - remove your finger. if your straw wa almost all the way under you will shoot a little water in the air but the cupp will not empty - physical principles are the same
13548
With all due respect to bobo, guns fire just fine underwater - just make sure the entire barrel is flooded with water and that your bullets aren't hollowpoint so they don't expand in the barrel.\n\nDoing that will really screw up your gun, but the cartridge will fire unless it has water inside. Metallic cartridges make their own oxygen as they combust; they'd work just fine in outer space minus the loud noise.
148622
Yes. The gravitational force is not that weak.\nNote also that the pressure difference is not sudden at all, higher and higher into the atmosphere, the pressure becomes lower as the weight of the particles above becomes less. As the pressure gets lower, the effect of gravity is also lower.\nWe do still lose some air particles into space, but not a significant quantity.
78230
Ah.. Get back with us if a few years..... lol\nThen we'll KNOW the answer.\n\nBut I would think #3.  Mount a rocket motor on it. It's got a lot of mass to get moving with the other methods not being, today, that efficient.
468288
.  Such a gun would be difficult or impossible to make.  Friction with the other air would cause your project stream flow to become turbulent very quickly.  Special nozzle design could improve the length over which the high pressure flow held together, but getting the flow to hold together for 20 nozzle diameters would be something which has never yet been accomplished.  That would mean that a 1 inch diameter nozzle would produce a flow which was no longer tightly focused 20 inches from the gun.  And, to produce such a high pressure with any useful amount of air, the gun would have to have a very heavy walled pressure tank.  \n.  Where air charge guns are used to some effect, the inoculation of large groups of people, like in the Army, pressurized air is supplied by a hose from an air compressor or a pressurized air tank.  This is not a very portable system.
604436
actually, it can! If you understand physics, the website below has proof. (but I dont know how hard you threw it.)
430309
i duno but i was looking at that the other day! i think it would be really cool if it did...it must work as it is advertised like that...if you try it let me know if it works!! :-P
71656
Nope. You couldn't fill anything. The balloon would just be empty. But why would you use a "hand pump" in space?
74263
No.\n\nThere is something often called "quantum teleportation," but it is much more analgous to a fax machine which send a set ot particle properties from one subatomic particle or atom, to another subatomic particle or atom. This is imporant work and will likely impact things like cryptography, but, despite the name which appears in popular accounts it is NOT teleportation in the Star Trek sense.\n\nEven in star trek they realize that it is fundamentally impossible to identify the position and location of each particle in a person accurately enough to be able to reconstruct it - hense the 'heisenberg compensator' they mention in some of the more recent shows.\n\nAlso the amount of energy in something the size of a person is enormous, more than all the nuclear weapons we have. (I'm guessing, but it is in that range.)\n\nSo, no, I would hope no one is working on this. At best, someone can be working on the physics which will lead to the physics that leads to the physics underlying such a device. Assuming such a device is even possible.
115708
I'm not sure what you're angling for, but it did get\nme thinking.\n\nSomeone else offered a gun/bullet combination, which could\npossibly qualify since the *bullet* is non-mechanical\nand engine-less.  The bullet is "man made" in that the\nlead was shaped by man.  Seems to me like its worst\noffense is that the the gun is mechanical and has moving\nparts.\n\nAnyway, consider a cyclotron.  To the best of my knowledge,\nit has no moving parts except for the magnetically\npropelled projectiles.  Once the charged particles\nare smashed together, they produce new particles -- in\na sense, these new particles are man made (ie. because\nthey didn't exist before men made them from other\nparticles).\n\nThe interesting thing about this example, though, is that\nthese objects can leave the point of impact at pretty\nclose to the speed of light.  This may not fulfill your\nrequirements, but I doubt you'll find anything faster :-)
101134
I'm sure physicists around the world ponder these questions on a daily basis.\nFirstly,astronomers believe that there is a super-massive balck hole at the center of our galaxy, the Milky wave. Through spectrometric measurements, they have shown that the large amounts of gamma rays emitting from it are due to the huge chunks of nearby stars and matter that it sucks in each second. It is believed that this matter is absorbed by the black hole and compressed into nothingness. However, some believe that some of this matter (including people) could be transported through some sort of tunnel into another part of space\n\n2. No one knows for sure if wormholes exist. But if they do, it could provide a way to travel faster than the speed of light like in star trek or other shows, the so called "hyperspace".\n\n3. Yes, if you dug through the earth, you'd emerge into space, with nothing under your feet. If you were to travel in such a "hollowed-out" tunnel, as you approach the center of the earth, the gravity would gradually decrease until it would be zero at the exact center. If you drop a ball into this tunnel, it would oscillate forever, assuming no air is present, like a spring with simple harmonic motion since the gravity is a function of depth.
280752
No, this is not perpetual motion, and the ball would not make it up the other side to come out again.\n\nThis is due to the fact that there is air resistance which would slow the ball down, even if it is very aerodynamic.  It would hit terminal velocity rather quickly, and not be able to accelerate any further.  So, in its trip back "up" the other side, it will not have nearly enough velocity to make it all the way up.\n\nThe friction with the air would eventually cause the ball to come to a stop, at a point roughly midway between the ends of the pipe (at the center of gravity).
261163
Yes!\n\nAs it turns out, radio waves are nothing more\nthan the propagation of electrical and magnetic\nfields through space--the E & M fields perform\nan intricate dance around each other and fly\nthrough space.  So yes, you can transmit\nenergy through the air and "catch it" with\na receiver antenna. That's exactly\nwhat a microwave oven does:  the business\nend of a microwave is a transmitter and antenna,\nand the food is the receiver.\n\nI suspect the energy needed to propel\na car-sized vehicle, however, would involve \ndangerous amounts of power.  Any bird, pet,\nor human which passed between transmitter and\nvehicle would be zapped.  Streets\nwould be littered with smoking corpses, and\nyou'd smell BBQ all day.\n\nBut hey, BBQ ain't a bad thing!
429227
Accelerating in a circle is not a good idea, as the centrifugal force of something as heavy as a train would quickly overcome even the strongest magnetic field. It's better to accelerate in a straight line, which is called a railgun.\n\nWhile a railgun is theoretically possible, the speeds you can attain are fairly modest by spaceflight standards. The principal equations you need for calculation are these:\n\n1.\na = v / t\na is acceleration, v is velocity, t is time. In metric units, an acceleration of 1g (1 x the force of gravity) is 9.8 m/sec^2\n\n2.\nd = 1/2 a t^2\nd is distance (in meters)\n\n3.\ne = 1/2 m v^2 \ne is energy (in Newton-meters)\n\n4.\np = e / t\np is power in Watts\n\nWhen you do the math, start by assuming some reasonable value for your mass, the length of your railgun, and the maximum acceleration your astronauts can stand on launch. You find that in order to get up to spaceflight speed, you need (1) a rail tens or hundreds of miles long, (2) an acceleration several times that of gravity, and (3) the power requirement of a large dedicated powerplant. Not too practical!
672516
Yes, it could be done, but you would need a very large field. Even so, scientists have allready created super electromagnets to levitate stuff.
491972
The only way for the cannon ball could circle the earth is if you could neglect air friction and use one hell of a canon.You would also be able to clear any thing in it's path.Great question but I didn't have time to calculate the initial velocity of the cannon ball.
37078
I would have two large, EXTREMELY LARGE balls attached with a rather large string or steel cable or whathaveya. I would throw one ball in space and BAM it goes on forever!\n\n~or two quote someone, until it hits something.