<span>1. </span>Unit of measurement is a numerical value that
identifies the magnitude of a physical quantity. Hence, there were a lot
measurement that was used pre-modern era. And now, Internation System of Units
is used. <span>2. </span>System of measurement is a range, assortment and
group of units of measurement in a single quantity to be measured which
entirely related to each other. 3.Tools of measurement are devices that construes
a quantity or a series of system measurement. It an object that relies on being
valid and reliable, used in many certain areas like physical quantities,
psychological constructs or other entities that can be measured and has a
system of measurement.
I'd say the combustion engine, even though it was toyed with in the mid-west during the cowboy era, it wasn't until after the Civil War in which it was a fully effective gasoline powered engine.
