Everything measureable has a unit it is measured in.
Average weight of an element expressed in Atomic Mass units.
Angular Measure
slug-feet/second
Area is always expressed in some unit of area. This is often some unit of length, squared - for example square meters, or square millimeters. However, there are units (such as the acre) which are not the square of a unit of length.
In terms of colonies or colony forming units (CFU).
Directions are expressed as units of
The surface area of a shape is expressed in square units.
Here are some international units of measurement:Mass is expressed in kilograms.Length and distance is expressed in meters.Time is expressed in seconds.Electrical current is expressed in amperes.Speed is expressed in meters/second.
Average weight of an element expressed in Atomic Mass units.
It is expressed in cubic units.
Mass is not expressed in kilometers (km). That is a measure of distance. Mass is expressed in units of kilograms (kg)
-- The distance that light travels in some amount of time is expressed in units of distance. -- The time that it takes light to cover some amount of distance is expressed in units of time. -- The speed of light is expressed in units of speed . . . distance/time
The concentration can be expressed in mole/litre.
Assuming you mean "phase", it is usually expressed in angular units - degrees, or radians.
Angular Measure
grammes and kilogrammes
Wavelength (Apex)