Class

NSUnitPower

A unit of measure for power.

Declaration

@interface NSUnitPower : NSDimension

Overview

You typically use instances of NSUnitPower to represent specific quantities of power using the NSMeasurement class.

Power

Power is the amount of energy used over time. The SI unit for power is the watt (W), which is derived as one joule per second (1W = 1J / 1s).

The NSUnitPower class defines its base unit as watts, and provides the following units, which are initialized using NSUnitConverterLinear converters with the specified coefficients:

Name	Method	Symbol	Coefficient
Terawatts	`terawatts`	TW	`1e12`
Gigawatts	`gigawatts`	GW	`1e9`
Megawatts	`megawatts`	MW	`1000000.0`
Kilowatts	`kilowatts`	kW	`1000.0`
Watts	`watts`	W	`1`
Milliwatts	`milliwatts`	mW	`0.001`
Microwatts	`microwatts`	µW	`0.000001`
Nanowatts	`nanowatts`	nW	`1e-9`
Picowatts	`picowatts`	pW	`1e-12`
Femtowatts	`femtowatts`	fW	`1e-15`
Horsepower	`horsepower`	hp	`745.7`