A beard second. It was named this because it is the average speed of growth of a beard (a beard grows abouts 5 nanometers a second).
I'm guessing that you're about to become a YouTubillionaire..?
Yes, but it would not be a sensible measurement unit.
Nanometers, just like meters, are used to measure length.
Centimeters, millimeters, meters, kilometers, miles, micrometers, nanometers.
Five grains is equal to 0.32 grams. A grain is very old unit of measurement that is no longer commonly used.
You may mean a unit of measurement equal to to 5.5 yards. Or a unit of square measurement equal to 30.25 square yards
Nanometers, 10-9 meters and Microns 10-6 meters
A tetrameter is not a unit of length - it is a unit of rhythm. Perhaps you are mistaking this for a terameter, which indeed is a unit of length, equal to 1,000,000,000 metres.
A conversion factor.
A centimetre.
There is no such unit of measurement as a "decimal". The unit is therefore equal to itself in the same measurement.
Inches and inches are the same unit of measurement. Therefore, 5.8 inches is equal to 5.8 inches.
Yes. A gram is a unit of weight, equal to 1000th of a kilogram.