pkar.Physic1451 1.0.0

This Nuget provides you useful types for various physic calculations. It is based on IEEE 1451.0 Physical Units (clause 4.11 in 2006 version, clause 4.13 in 2023 version) structure, which is based on Hamilton, Bruce, “A Compact Representation of Physical Units” Hewlett-Packard Company, Palo Alto, California, Hewlett-Packard Laboratories Technical Report HPL-96-61, 1995.

In physics, we have no numbers as numbers - every number has unit. It is not "5", but "5 meters", "5 seconds", "5 amperes", "5 billion years", etc. Each calculation is done in two steps: (1) calculate number, and (2) calculate units. Now, you can make your own value calculation using e.g. double type, and calculate units using this Nuget.

Class Units

To use, first you should create new Units object. It can be done in several ways:

UnitsForYourVariable = Meter	// and now UnitsForYourVariable is Meter
UnitsForYourVariable = Meter(2)	// and now UnitsForYourVariable is m²
UnitsForYourVariable = SquareMeter // same as above

For SI derived units, you have many options available:

UnitsForYourVariable = Volt
UnitsForYourVariable = Watt / Ampere
UnitsForYourVariable = Meter(2) * Kilogram() * Second(-3) * Ampere(-1)
UnitsForYourVariable = new Units(0, 0, 2, 1, -3, -1, 0, 0, 0)

You can also use general constructors:

New(_radians , _steradians , _meters , _kilograms , _seconds , _amperes , _kelvins , _moles , _candels )

There are four operators defined: multiply (*), divide (-), equals (=) and differs (not equal, <> or !=).

You can also test if one unit "is inside" second unit, e.g. if Amper has meters:

value.Contains(value2)	// Check if units in value2 are used in value1; and sign of unit powers should be same (second is not inside Volt, but Hertz is)
value.AbsContains(value2) // Check if units in value2 are used in value1; and sign of unit can be either positive or negative (both Hertz and second are inside V)

Class PhysicalValu

It is simply value with units. You have two constructors:

  Public Sub New(_value As Double, _unit As Units)
  Public Sub New(_value As Double, _unit As UnitEnum)  // this one can convert from CGS etc. to SI units

There are six operators defined: multiply (*), divide (-), add (+), subtract (-), equals (=) and differs (not equal, <> or !=).