Question

Another name for the unit ‘light-foot’ is a five-letter word that is used in the English language to mean ‘an extremely short amount of time.’ It is approximately equal to 10 raised to the power of negative 24  seconds. What is this unit of measurement called?​

Answer 1

Another name for the unit ‘light-foot’ is Jiffy

Definition of Jiffy:

1. Jiffy refers to the time taken for light to travel one Fermi, which is around the size of a nucleon, that is, $10^{-15}m$.
2. A Jiffy is around $3*10^{24}$seconds which is also equal to $10 \ milliseconds$ or $0.01 \ seconds$.
3. Jiffy is also a term in the English language that refers to ‘an extremely short amount of time.’ For example, "I'll be back in a jiffy" is an informal expression for any undetermined brief period.

It has now gained a variety of more specific applications as the name of several different units of measurement, each of which is used to convey or quantify a very short period of time.