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The watt-second is a unit of energy, equal to the joule. One kilowatt hour is 3,600,000 watt seconds. While a watt per hour is a unit of rate of change of power with time, [iii] it is not correct to refer to a watt (or watt-hour) as a watt per hour. [36]
The dimension of power is energy divided by time. 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.
The watt-second is the energy equivalent to the power of one watt sustained for one second. While the watt-second is equivalent to the joule in both units and meaning, there are some contexts in which the term "watt-second" is used instead of "joule", such as in the rating of photographic electronic flash units .
joule second (J⋅s) reduced Planck constant: joule second (J⋅s) action: joule second (J⋅s) intensity: watt per square meter (W/m 2) sound intensity: watt per square meter (W/m 2) electric current: ampere (A) moment of inertia: kilogram meter squared (kg⋅m 2) intensity: watt per square meter (W/m 2)
1.03 × 10 7 W geo: electrical power output of Togo: 1.22 × 10 7 W tech: approx power available to a Eurostar 20-carriage train 1.5 × 10 7 W tech: electrical power consumption of Sunway TaihuLight, the most powerful supercomputer in China 1.6 × 10 7 W tech: rate at which a typical gasoline pump transfers chemical energy to a vehicle 2.6 × ...
The joule-second (symbol J⋅s or J s) is the unit of action and of angular momentum in the International System of Units (SI) equal to the product of an SI derived unit, the joule (J), and an SI base unit, the second (s). [1] The joule-second is a unit of action or of angular momentum. The joule-second also appears in quantum mechanics within ...
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The British imperial units and U.S. customary units for both energy and work include the foot-pound force (1.3558 J), the British thermal unit (BTU) which has various values in the region of 1055 J, the horsepower-hour (2.6845 MJ), and the gasoline gallon equivalent (about 120 MJ). Log-base-10 of the ratios between various measures of energy