When you are sealed in your home, A/C running, where does the fresh oxygen come in?
406542
there should be a vent in your house or whatever where it sucks in air from the room, but it is filtered before returning to the room(s)
437631
air...or dirt...or..hmm..how bout you go and find out
263853
Air is composed of various gases in our atmosphere.\nNitrogen N2  78.084 % \n \nOxygen O2 20.9476 % \n \nArgon Ar 0.934 % \n \nCarbon Dioxide CO2 0.0314 % \n \nNeon Ne 0.001818 % \n \nMethane CH4 0.0002 % \n \nHelium He 0.000524 % \n \nKrypton Kr 0.000114 % \n \nHydrogen H2 0.00005 % \n \nXenon Xe 0.0000087 % \n\nThe most common and cheapest way to extract oxygen is to pass air through something that will take out everything BUT the oxygen. Thankfully we have a material called zeolite that does just that. When air is passed through the zeolite the nitrogen and other gases are bound to the zeolite and lets the oxygen pass through. This is then pushed into a storage tank. The zeolite is then placed in a vaccum to remove the nitrogen and other gases and then more oxygen comes in. You can generate oxygen also from the electroylsis of water, but thats not as common.
406302
a) When you inhale, air goes through your nostrils and into you air ways all the way to your lungs.\nb) Inside your lungs are small alveoli that capture O2 molecules and trap them for your red cells to start working.\nc) Each red cell is like a carrier that excahnges O2 molecules for CO2 moluecules (those of used air on your bloodstream)\nd) Red cells go through your blood to every tiny place in your body giving oxygen where is needed and taking CO2 back to the lungs.  Your lungs get rid off those CO2 molecules when you exhale.\ne) You heart pumps blood in two directions:  It makes the blood with carbon dioxide (CO2) go to the lungs and the blood that is oxygen rich, go to all your body.  Your brain is the primary oxygen client in your body.
340648
maybe this is just stupid but on the outside of the hydrant: paint?? oxygen and carbon dioxide(air)?? urine??\n\nduh...I got it..duh(feeling stupid) duh..suck at riddles despite growing up with an Irish stepfather(always doing that)\nt-h-a-t.  duh..
28516
Breath them in one at a time for 5 min each.  If you die it was CO2 if you're alive it's O2.\n\nor fill 2 jars with the different gasses. stick a lit candle in them. if the candle goes right out its CO2 if it stays lit its O2.
667559
First off it isn't air in your can.  What you probably have is either propane or butane in the can.  It is a liquid under very high pressure.  However, when it loses its pressure, it expands rapidly, and for it to expand rapidly, it needs HEAT, so it pulls heat from its surroudings to expand.  The absence of heat is cold, so that is why the can freezes up.\n\nThe same principle works in an airconditioner.  The compressor, squeezes the freon gas so it becomes a liquid and gives up heat (outside unit called a condenser blows out hot air).  The liquid freon then travels to an expansion valve or capillary tube where the compressor that is squeezing the freon into liquid is also sucking gaseous freon in on the suction side.  So there is low pressure on the suction side.  The liquid freon from the expansion valve or capillary tube enters this low pressure area and expands rapidly.  As it does, it draws heat to expand, thus pulling the heat from your home and cooling the air.
937251
Oxygen is produced usually as a gas or liquid from air by a method called cryogenic distillation. \n\nIt basically consists of cooling the air (which costs nothing as raw material) until it liquefies, and then distilling the different components (nitrogen, oxygen, argon, etc) as you would distill any other mixture.
497419
The location of AC supply vents is strictly a matter of what is simpliest, easiest and cheapiest for the HVAC contractor. \n\nNo matter where you put them, the air from the AC is cooler that any other air in the room and will tend to go to the floor. So no matter when you have the vent the cooler air ends up in the same place.\n\nThe same story for air in the heating season. Except in reverse because warmer air rises.
181593
i don't think i quite know what ur asking, but as the air enters ur body, it is humidified, and warmed and passes thru ur pharynx, trachea and bronchi before it reaches ur lungs...  i hope that answers ur question
506524
The vast majority of air conditioning systems do not purify air.  There are a few that do however.  Some air conditioning units are equipped with HEPA filters.  These filters filter out quite a lot of small particles.  Some use activated-charcoal which is able to chemically react with many potential toxins in the air.  Others use UV light inside the air conditioning unit in order to break down particles of pollen, viral particles, bacteria, and fungi.  I am unaware of any that can remove CO2, but there are some that can probably remove CO.  Some do unfortunately produce ozone.\n\nThe units that use UV light can produce ozone, and sometimes can even blacken walls where they pump out air.  Some filters use charged plates to capture charged particles in the air.  These charged plates can also cause the formation of Ozone.
110943
The air inside attempts to equalize with the air outside.  This means if you have bad insulation, your warm air will seap out and cold air will seap in.  With good insulation, this will happen less, and it won't take as much money or energy to keep the house warm.
1111346
The most effective way is with one or more large fans blowing in, on the lowest level of the house, and the windows on the upper level (if there is one) open. By forcing air into the home, you create a positive pressure, and that, along with the fact that hot air rises, moves the air through the home.\n\nIf you ever watch the fire department removing smoke from a building, you will see them using the positive pressure ventilation method
887540
first: air is warmed by the rich vascular net in the nasal mucosa. Second, air is humidified by nasal secretions. Third, air is filtrated and some gross particles are captured by the endoturbinates, to prevent tehir entrance into the larynx.\n\nThe accesory muscles expand (internal intercostal)or contract (external interconstal)the thoracic box like a pump. that´s the way they help .\n\nCarbon monoxide is very dangerous because it has several times more affinity with the hem group of hemoglobyn than oxygen. So, in an environment rich in carbon monoxide, when inspirated it binds to hemoglopbyn, displacing oxygen molecules from the Hem group and  preventing them to reach the organs, causing tissue anoxia and sometimes death. Treatment involves oxygen therapy, and sometimes a hyperbaric chamber( a place with high concentrations of oxygen in the air, and at a higher atmospheric pressure).
67772
Two things....\n1) Air vent closed\n2) the main way is closed
512231
20 C is about room temp... it's a gas, clear and odorless.
658456
Something that you keep on top of the air conditioning unit.