A "barn" is a unit of measurement used in what?
Building the cell tower
Which of these is widely considered responsible for teaching people how to send a text message?
Answer: Nuclear Physics
When you think of a barn, you are probably thinking of a large storage building on a farm. In the tiny world of nuclear physics, however, a barn is an absolutely tiny measure of an area equal to 1.0 × 10-28 m2.
The term was born in the Manhattan Project in the 1940s. Physicists working at Purdue University needed a secret term to refer to the approximate section of the nucleus of an atom. The decision to use "barn" as a term was an intelligent joke, as their research was aimed at reaching the nucleus with an accelerated particle – an extremely difficult task – but the English-American idiom "could not hit the open sea. Next to a barn "suggests someone with a purpose so poor that it is impossible to hit a big object with a baseball.
Two derived units of surface measurement are used less frequently: the dependency (1.0 × 10-6 stalls) and the shed (1.0 × 10-24 stalls).