This happens because the temperature at which oxygen changes from a gas to a liquid is about 13 degrees Celsius above that of nitrogen. The oxygen can be seen dripping from the can just as on a humid day you can see drops of water condense and drip from a can you take from the refrigerator.
Though you technically can join the military up to age 42, if you're 35 or over you'll need an age waiver if you've never been in the military before.
Joins the Armed Forces - You must be 17 to join, and if you are below the age of 18 you need your parent's permission. Reaches the age of majority â The age of majority is 18 in most states, but varies. To find the age of majority in your state, go to FindLaw's State Legal Ages Laws and select your state.