Coherent units are derived units that contain no numerical factor other than 1 quantities such as standard gravity and density of water are absent from their definitions.
32.
Though the dioptre is based on the DIN specify a unit name ( dioptrie, dioptria, etc . ) and derived unit symbol " dpt ".
33.
The square wa equals 1 / 100 ngaan or 1 / 400 are, another metre-derived unit of area not officially part of the SI.
34.
Since the gravitational acceleration on the surface of the earth can differ, one gets different values for the unit kilopond and its derived units at different locations.
35.
A basis for a given vector space of dimensional symbols is called a set of fundamental units or fundamental dimensions, and all other vectors are called derived units.
36.
The other units of length and mass, and all units of area, volume, and derived units such as density were derived from these two base units.
37.
The "'ohm "'( symbol : ? ) is the SI derived unit of electrical resistance, named after German physicist Georg Simon Ohm.
38.
:The liter is one tier down from the watt, the joule and the newton in that it's not " officially " a derived unit either.
39.
Now choose " k " = 1; then the meter per second is a coherent derived unit, and the kilometer per hour is a noncoherent derived unit.
40.
Now choose " k " = 1; then the meter per second is a coherent derived unit, and the kilometer per hour is a noncoherent derived unit.
