What would happen to an unprotected cup of water during a space walk?
488884
There are two different "environmental conditions" which would affect the water: very low pressure and very low temperature.\nThe first thing to happen is that the water would "boil" (that is start to turn into a vapor).  This would be described as a "vacuum distillation."  This process (which removes heat from the liquid water), combined with the already low temperature would remove enough heat for the water to freeze.\nIf the container was allowed to remain exposed, the solid water would slowly continue to "sublime" (turn into a vapor under reduced pressure) until some sort of equilibrium was reached.\nNo.  I do not believe that this experiment has been tried, or if tried, the results released to the general public.
1143031
None, unless you put some in it or it rains!
306454
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
331943
Should think so.\n\nYou can take a pot of water and an intense laser with you to space (Combustion may not be your best bet, even if you are taking oxygen cylinders. It may get too unpredictable).\n\nOnce in space, direct the laser at the pot. In due time, it should 'boil'.\n\nWell actually, the behaviour of water at zero pressure is quite peculiar. It can be seen from the phase diagram that water skips the liquid state at low pressures, and exhibits sublimation. \nSo even if you manage to keep the water liquid until you ready it for boiling, the moment you expose it to space(meaning zero pressure) some of the water will immediately turn into vapour. The remaining mass, will, in the absence of any heat source, freeze. \n\nIf you do provide heating, it will obviously vapourize. \nThus, strictly speaking, it will not 'boil'.
999938
One of the biggest risks in space is exposure to radiation. Highly-energetic particles - called cosmic rays - are constantly zooming through space. These particles, when they interact with the cells in our body, can cause these cells to mutate and form cancers and tumors. The same thing can be said for the other forms of radiation, most of which come from the sun but some of which comes to us through interplanetary space. These are the ultraviolet and infrared rays given off by the sun, as well as other atomic and nuclear particles which have the same affect as the cosmic rays mentioned before. These radiation also can adversely affect any electronic equipment - satellites, space shuttles, etc. We are protected from a majority of these rays and particles by the Earth's atmosphere; there is no such protection in space.\n\nAnother consideration is the bits of dust that are drifting about out there. These grains (micrometeorites) are extremely tiny but have a velocity which can - sometimes - penetrate a spacesuit or ship. Getting hit with one probably won't be terrible but, a few hundred can severely damage a spacesuit, shuttle or whatever equipment might be lying in their path.
471492
First, due to the extremely low pressure- 0 pascals - all of the liquids in your body have their boling/freezing points lowered to the same temperature; all of your exposed fluids will boil: tears on eyes, saliva, urine (depending on the person's ability to keep his or her cool). Then, the capillaries around and on your eyeballs and other mucous membranes would rupture, spraying boiling blood into space. After about 20 seconds the normal person would be unconcious, though NASA trains its astronauts to last a full minute. After about 3 minutes you would succumb to suffocation, and you body would drift to space, nearly perfectly preserved, until:\n-It finally reentered Earth's atmosphere (assuming you were in Earth's orbit), where it would vaporize; \n-It hit another space object, such as an asteroid; \n-It is pulled in by another planet. \nIt all really depends on your location.\n\nP.S. contrary to popular belief, you would NOT explode. Your body structure and skin tautness will prevent that; however, you will probably reach a very unsightly level of bloating.
386642
After eating, astronauts settle down to the assigned tasks of the day, either supervising experiments or performing routine maintenance on station equipment. It takes a complex array of machinery to keep people alive and well in orbit. Daily, each human breathes the equivalent of 0.9 kg. of liquid oxygen - enough air to fill a 3.5 cubic metre room - and drinks a total of 2.7 kg of water. To minimize on resupply needs, the ISS life-support systems are designed to recycle as much as possible. Waste water from urine and moisture condensed from the air is either purified and reused direct, or broken down by electrolysis to provide fresh oxygen. Carbon dioxide 'scrubbers' chemically remove that toxic gas from the air.
1046638
i don't really know about this but i'm fairly sure i can give a better answer than lrisjqoijgjr  \n\nyou could probably use a surfactant to break down the molecular attraction between the water molecules but this would leave pollution through the path of whatever you were using to travel through the water\n\nbut yeah not really practical but better than uingnpds
974729
Gravity. Water doesn't seek its own level on the Space Station, it forms a ball-shaped blob.
124307
Excellent question. It is possible. I assume you mean the solid form of water (ice). It is theoretically possible. At this time finacially impossible. You would lose a percentage of the surface area of the ice by sublimation. How do you propose to freeze the water to begin with? How will you keep it frozen (remove absorbed heat energy)? Where will your source of water be? If you are taking water from Earth, how will you get it into space?
254615
You would need to make a distiller of sorts - the sun's rays could evaporate the pure water, and you would just need to capture the water vapor - use a leaf or something similar to direct the vapor into a cup.  \n\nHere's a link on PBS Kids that explains it. Of course, on a deserted Island, you might not have plastic wrap, but you could very well improvise.
56936
OK... let's get graphic.\nFirst off..... you'd die! No way around that!\nWhat would kill you first is the question.\nSpace is incredibly cold, so instant exposure to space would freeze almost all liquid in your body solid.\nSpace is also a HUGE vaccum, so all the air would be sucked out of you either while you're freezing solid, of during your freezing process.... either way, you'd suffocate if you didn't freeze by some miracle.\nSpace has absolutely no compromising pressure like the inside of our atmospere. Our bodies are used to a certain atmosperic pressure. Without it (I.E in space) if you didn't freeze or suffocate, eventually the lack of pressure would collapse our fragile bodies.\nThe possibilities for death are indeed endless.
253535
By placing the watch glass to cover the beaker, not only the solution can avoid being spilled, the tiny molecules (ex. H2O) will not be evaporated to mess up your calculations. If you(me too, I'm not gonna pick on you) use a very accurate measuring device that can measure mass up to the 4th decimal place(1/10,000) Those tiny water molecules make a difference in our calculations.
826503
I just watched a news special recently on nbc re: freezing water bottles.\n\nI found this article that I copied and pasted.  But I have also read on other websites that it does not.\n\n"DIOXINS Carcinogens cause cancer. Especially breast cancer. Don't freeze your plastic water bottles with water as this also releases dioxins in the plastic. Dr. Edward Fujimoto from Castle Hospital was on a TV program explaining this health hazard. He is the manager of the Wellness Program at the hospital. He was talking about dioxins and how bad they are for us. He said that we should not be heating our food in the microwave using plastic containers. This applies to foods that contain fat. He said that the combination of fat, high heat and plastics releases dioxins into the food and ultimately into the cells of the body. Dioxins are carcinogens and highly toxic to the cells of our bodies.\n\nThen I found this article from John Hopkins that says it does not\n\n\nBALTIMORE -- Johns Hopkins researchers have responded to an e-mail warning against freezing water bottles. A recent e-mail hoax claims Hopkins scientists warned people that freezing plastic bottles releases dioxins into the water. But the researchers say that's entirely false -- they said freezing plastic water bottles will not expose people to dangerous chemicals.\n\nResults | Disclaimer \n \nAccording to Dr. Rolf Halden, of the Johns Hopkins Bloomberg School of Public Health, freezing actually works against the release of chemicals and scientists are not even sure plastics contain dioxins. \nHowever, Halden does warn that another group of chemicals that are used to make plastic less brittle can be released if you place them in hot water or heat them in the microwave.\n\nBut Halden stresses that people should not be afraid of drinking water and that "you are more likely to suffer from the adverse effects of dehydration than from the miniscule amounts of chemical contaminants present in your water supply."\n\nHe also said people should be more concerned about the quality of the water they drink more than the bottle from which they drink it. Although people tend to assume bottled water is the safest route, Halden said city water is much more highly regulated and monitored for quality.
319184
if the cold thing is cold and crystaline, like pyrex or ice, the object cracks because of rapid localised expansion.\n\nIf it is really really cold, the water will crystalise.\n\nIf cold water hits something hot it forms little drops with a protectice steam jacket and they bounce around for ages, a cool experiment for home on a hot frying pan. (only uses drops of water though)
320863
No.   The oxygen would just diffuse out into the vacuum.   Surface tension of the liquid surface holds a bubble together.
1078588
yes the glass would break because unlike any other liquid water expands when frozen therefore the glass would break regardless of how full it is