precipitation in Culture. In meteorology, the fall of water, ice, or snow deposited on the surface of the Earth from the atmosphere. In chemistry, a chemical reaction in a solution in which a solid material is formed and subsequently falls, as a precipitate, to the bottom of the container.
In the United States Army, Army Reserves, and Army National Guard, the maximum age allowed to enlist and ship to basic training is 35 years old. The Army experimented for quite some time allowing anyone up to the age of 42 years old to enlist and complete basic training.
To join the Army Reserve you need to be 18. You can apply to join when you are 17 years and 9 months old, so that you're ready to join on your 18th birthday. To join as a soldier, you must apply by the time you are 49 years and 11 months.