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In the International System of Units (SI), the unit of power is the watt (W), which is equal to one joule per second. Other common and traditional measures are horsepower (hp), comparing to the power of a horse; one mechanical horsepower equals about 745.7 watts.
By definition, one watt is equal to one joule of work done per second. So if P represents power in watts, Δ E is the change in energy (number of joules) and Δ t is the time taken in seconds then: P = Δ E Δ t. There is also another unit of power which is still widely used: the horsepower.
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Feb 20, 2022 · The SI unit for power is the watt \ (W\), where 1 watt equals 1 joule/second \ ( (1 \, W = 1 \, J/s)\). Because work is energy transfer, power is also the rate at which energy is expended. A 60-W light bulb, for example, expends 60 J of energy per second.
watt is the unit of power. From the basic definition… any units of work (or energy) and time can be used to generate a unit of power. The International System uses joules [J] and seconds [s] for these, respectively. A joule per second is called a watt [W] in honor of the Scottish mechanical engineer James Watt (1736–1819).
Power (w)Device, Event, Phenomenon, Process101 erg/second10human, sounds produced during normal ...0.2931 Btu/hour11 watt, 1 joule/secondAccording to popular standards, the SI unit of power is none other than the watt which is represented by the symbol (W). One joule per second is also equal to one watt. Interestingly, the name was kept in recognition of James Watt, who invented the condenser for the steam engine.
The unit of power is the joule per second (J/s), known as the watt. The rate at which the body uses food energy to sustain life and to do different activities is called the metabolic rate, and the corresponding rate when at rest is called the basal metabolic rate (BMR).
2 days ago · The unit of power is the watt, which is abbreviated by W. It has an SI base unit and several derived units that are used to measure other physical quantities associated with energy or work. The International System (SI) states that one joule per second equals one watt.
