i want to know when we go up in air \ndoes it become harder to breath or easier
213976
it depends on how you go up in the air.\n\nthe Concorde flew at Flight Level 600, that is 60,000ft, and returned with live passengers.....no breathing problems throughout the flight.\n\nassuming you don't have that pressurised cabin of the Concorde around you...........then of course breathing will be extremely difficult at higher altitudes, because the higher you go the thinner the air gets. and at one stage you just can't breathe at all.\n\nbut that will be some 'serious' altitude.............don't worry you can't jump that high.
418611
Your puzzle is explained in part by the thermodynamic behavior of air.  \n\nWhen a 'pocket' of air is heated, its density decreases relative to the surrounding atmosphere, and so it begins to float upward.  As the hot air rises through the troposphere, the pressure around it drops, because there is less air and more available space to fill.  The volume of the hot air expands as a result, but this expansion progressively drains the heat from the air, through a process called 'adiabatic cooling.'  In the end, the air pocket is dispersed, its temperature dropping far below the air temperature at the Earth's surface.  This process happens constantly, all over the atmosphere, and is one factor contributing to the overall 'lapse rate' of the atmosphere (the rate of temperature decline as altitude increases).
651235
gravity and air resistance.
230020
No airplane, no matter how well built, is entirely air tight.  A bit of air leaks out slowly through many points and therefore the plane needs a mechanism to keep the pressure up so we can breathe inside.  \n\nThe air pressure inside the airplane is generated by a compressor.  As airplanes get older, the compressors don't work as well and thus take time to adujst the pressure in the cabin, and thus why you can feel the difference in your ears.
173398
Here's the real answer to your question:\n\nTake a deep breath in, but don't hold it, just keep the air in your lungs for about 3-5 cycles (the time it would take for you to breathe in and out 3-5 times).  \n\nA hiccup results from your brain thinking your lungs aren't getting enough oxygen, so it forces oxygen in until something turns the trigger off.  Holding your breath doesn't turn the trigger off, because the hiccupping is centered around the inhale, but holding your breath = pausing the exhale.  But if you keep your lungs in a posture of continuous inhalation, the hiccups stop immediately because the brain realizes the lungs are fully saturated.
149166
If you jump, you will be moving at the same speed as the vehicle just before you left the floor.\n\nWhen in the air, if the vehicle is accelerating, the vehicle will move forward faster than you and consequently, you will land some distance from where you jumped and vice versa.\n\nIf on the other hand, the vehicle was not accelerating, you will land at the exact place you jumped from. Of course, this is not counting air resistance.
272973
There was an interesting special on discovery science channel a year or so ago about flight.  One topic they touched on was why the human form cannot fly.  For one, our arms do not make good air foils.  Also, our pectoral muscles are nowhere near strong enough to move our arms even fast enough if they were.  And, lastly, even if our arms were shaped properly and our pecs adequate to flap quickly enough, the human body shape isn't conducive to a good power to weight ratio in order to over come drag effect.
534683
Lavender gave you the key information you need, i.e., too much oxygen damages the body. Probably the best-known example of this is blindness in prematurely born infants due to breathing pure oxygen for extended periods (which is sometimes necessary to keep them alive). There are probably medical techniques available today to minimize this problem, but it has been a serious issue in past years (20 years ago in one example I am familiar with).\n\nHere is a bit more information about breathing pure oxygen, and some clarification of the comments from others.\n\nYou can breathe pure oxygen for short periods in order to recover from lack of oxygen (athletes do it, as do firemen who have inhaled smoke, for example).\n\nThe air we breathe at sea level is at a pressure of 14.7 psi, and 21% of it is oxygen. (78% is nitrogen, and most of the other 1% is argon.) If you take 21% of 14.7psi, you'll see that we are breathing oxygen at a pressure of about 3 psi.\n\nPilots and astronauts can breathe pure oxygen, but as Lavender points out, they breathe oxygen at a pressure lower than sea level air pressure. If their oxygen is delivered to them at 3 psi, then it is equivalent to the oxygen in our air at sea level. (And incidentally, the air we breathe is not much changed at elevations up to 5,000 or 10,000 feet. As a rule of thumb, you can notice the difference in air pressure (the difference in the availability of oxygen) when you get close to 10,000 feet of elevation. At 18,000 feet, the air pressure is about 50% of that at sea level. And after another 18,000 feet, the pressure at 36,000 feet is cut in half again, so it is about 25% of the sea level pressure.)
442741
Gravity is an inverse square law for the further you are from the centre of mass the lower the graviational pull you feel. So yes gravity is less on the top of a mountain (and this has been measured) also these would be less air resistance as the air is of a lower density. These two factors would allow you to jump high, assuming you were on oxygen.
242893
The air enters into the same aveoli whether it is a short or long breath. The difference is, that if you take a long breath, more air is taken into the lungs and absorbed, which in turn will lower your heart rate. It basically tells the heart that it doesn't have to work so hard to oxygenate the body by pumping the blood. When you take short breaths, the heart has to pump more and basically work harder to get the oxygen distributed through the body because less air is taken in. That's why usually when you are taking short breaths, you are either active or afraid or anxious. In taking longer breaths you are more calm and relaxed. I hope this helps in some way.
91851
At sea level, the pressure the air exerts downward is at 1 atmosphere (normally).  If you decend 32 feet below water, the water pressure acting on you is 1 atmosphere as well, even greater as you go deeper.\n\nWhen you try to suck air down underwater, the water is trying to push it back up.  At some point, you just wont have enough "sucking power" to over come the weight of the water.
337165
We push off the ground with our muscles. When we push off we go against gravity just like we do when we walk, I s'pose. Then gravity pulls us back down.
129326
Not very easily. When crying you automatically breathe in a lot of air and that is a problem under water. You'd either drown or get up to the surface again very quickly.
86919
It all has to do with altitude. The higher you are from the earth, the colder it gets. Air is also thinner.
7735
The process of respiration involves two major processes: inspiration and expiration. \nDuring inspiration, the inspiratory muscles contract, the diaphragm descends, and the rib cage rises. The thoracic cavity volume increases, stretching the lungs, and the intrapulmonary volume increases. This causes the intrapulmonary pressure to drop. Air flows into the lungs until the intrapulmonary pressure equals the atmospheric pressure. \n\nDuring expiration, the inspiratory muscles relax, the diaphragm rises, and the rib cage descends. The thoracic cavity volume decreases, causing the the lungs to recoil, and the intrapulmonary volume decreases. This causes the intrapulmonary pressure to rise, and the air flows out of the lungs until the intrapulmonary pressure equals the atmospheric pressure.
488730
For a very short time, yes. People tend to forget about what's called "dead air spaces". Yes, you're exhaling some co2, but a good deal of that exhalation is still o2 ( it's not all used in a breath) and even more so in dead air spaces. These are areas in your body from the top of your lungs to the tip of your lips, that don't do any gas transfer to or from the blood stream. It's still normal, oxygen rich air in there.\n I also disagree with what one person has stated here, that artificial respiration is only a method to get the lungs moving. \n It IS in fact a method of oxygenating the blood stream and keeping a victim viable in the absence of their breathing on their own.
642372
when you take a breath in the oxygen is taken into the blood and exchanged for carbon dioxide(which is the waste products of air), the same air is breathed out it takes a second to swap