what is 1 foot long

Question

ineed help

Answer 1

A Grace Hopper nanosecond is a visual aid that represents how fast electricity can travel in one billionth of a second.

 

The name comes from the foot-long lengths of telephone wire that Admiral Grace Hopper used to give out at lectures. Admiral Hopper used the wires to illustrate how in one billionth of second (a nanosecond ) an electronic signal can travel almost twelve inches.

 

Answer 2

It's also 12 inches (unless you are ordering the below submarine sandwich from Subway).

Answer 3

I believe it's a submarine sandwich.