I am not sure what you mean exactly; however, the second is one of the seven base units of the SI.
Fundamental unit is Second.
micro second * * * * * No, that is a submultiple of a measurement unit of time - a second. Not of time itself. Time has no submultiples.
The second as a unit of time measurement was first defined by the ancient Greek astronomer Hipparchus in the 2nd century BC.
No one. A horse power is an Imperial measurement unit, not an SI unit and so a metre would not have featured!No one. A horse power is an Imperial measurement unit, not an SI unit and so a metre would not have featured!No one. A horse power is an Imperial measurement unit, not an SI unit and so a metre would not have featured!No one. A horse power is an Imperial measurement unit, not an SI unit and so a metre would not have featured!
SECOND
The unit of measurement for linear acceleration is meters per second squared (m/s2).
The unit of measurement for frequency of wavelengths per second is Hertz (Hz).
The basic metric unit for electrical power measurement is the watt, which is equal to one joule per second.
Micron is a metric unit of measurement and is one millionth of a meter. Mil is a unit of linear measurement in the FPS (Foot Pound Second) system. One mil is one thousandth of an inch.
The resulting unit of measurement when calculating Newton's Second Law of Motion is called a Newton (N).
A kilogram is a unit of measurement for WEIGHT. A newton (in the meter-kilogram-second system) is the unit of FORCE required to accelerate a mass of one kilogram one meter per second per second, equal to 100,000 dynes.
* The SI unit for speed is meters/second. This unit doesn't have any special name.* In general, you can use any unit of length, divided by any unit of time.