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.
You can apply to become a Reservist soldier when you're 17 years and 9 months-ready to start when you turn 18. You can join until the day before your 50th birthday. There are higher age limits for some specialist roles.o join the Army Reserve, you need to: 1  Prove that you either have British citizenship, or if you are a Commonwealth Citizen, Indefinite Leave to Remain or Indefinite leave to Enter must be stamped on your passport (Settlement) in the UK.