The water will boil
(no calculations necessary, but look at a table that shows the vapor pressure of water at different temperatures.here's a link: http://en.wikipedia.org/wiki/Vapour_pressure_of_water )
Water will boil if you put 20 C water in a vacuum chamber and reduce the pressure.
When pressure is reduced the boiling point will also reduce
When you release a gas in a vacuum chamber, it immediately drops to the floor because of its density. _______________________________________________________ I expect that the gas will expand to fill the whole volume of the vacuum chamber.
It's fairly simple. Build an air-tight container, and attach a vacuum pump to suck the air out. It's a fairly common thing to do, actually. For a more elaborate vacuum chamber, build a second fairly large airtight container and connect the two together with a valve between them. Attach a vacuum pump (or several of them) and "evacuate" the air from the large chamber. Then, when you open the valve between them, the air in the smaller chamber will immediately be sucked out and into the larger chamber, creating an "instant" vacuum.
Depends on If it's absolute or relative. Vacuum in any unit is zero in absolute pressure. Vacuum in any unit is -normal air pressure in relative pressure.
Many techniques have been developed for the measurement of pressure and vacuum. Instruments used to measure pressure are called pressure gauges or vacuum gauges.
You can't. There is no atmosphere in a vacuum.
When pressure is reduced the boiling point will also reduce
You want to stop boiling water Vacuum Chamber because of the vessel seal. If the pump is boiling it will stop at the point of equilibrium.
I'm thinking..get squashed by the pressure in space
A chamber vacuum cleaner can be purchased at Amazon, eBay or other second hand stores. There are many popular brands of chamber vacuum cleaning including Samsung.
When you release a gas in a vacuum chamber, it immediately drops to the floor because of its density. _______________________________________________________ I expect that the gas will expand to fill the whole volume of the vacuum chamber.
resonance chamber
The simplest method would be to mount a pressure gauge onto the chamber, then to observe whether the reading changes. It should remain at "zero" indicated gauge pressure. If your instrumentation is relative to atmospheric pressure, it would be a "minus" pressure and would vary with local atmospheric pressure. For very accurate readings, you would need something more sophisticated, such as an ionisation gauge.
vacuum is the absense of pressure
It's fairly simple. Build an air-tight container, and attach a vacuum pump to suck the air out. It's a fairly common thing to do, actually. For a more elaborate vacuum chamber, build a second fairly large airtight container and connect the two together with a valve between them. Attach a vacuum pump (or several of them) and "evacuate" the air from the large chamber. Then, when you open the valve between them, the air in the smaller chamber will immediately be sucked out and into the larger chamber, creating an "instant" vacuum.
The vantage meter, sold by Snap-On is used for numerous automotive diagnostics. The transducer package is used for pressure measurements. (Fuel pressure, oil pressure, combustion chamber compression, manifold vacuum, etc.)
Vacuum Chamber