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The joule (pronounced / ˈdʒuːl /, JOOL or / ˈdʒaʊl / JOWL; symbol: J) is the unit of energy in the International System of Units (SI). [1] It is equal to the amount of work done when a force of one newton displaces a mass through a distance of one metre in the direction of that force. It is also the energy dissipated as heat when an ...
Radiant intensity is used to characterize the emission of radiation by an antenna: [2], = (), where E e is the irradiance of the antenna;; r is the distance from the antenna.; Unlike power density, radiant intensity does not depend on distance: because radiant intensity is defined as the power through a solid angle, the decreasing power density over distance due to the inverse-square law is ...
tech: power output of P-51 Mustang fighter aircraft 1.9 × 10 6 W astro: power per square meter potentially received by Earth at the peak of the Sun's red giant phase 2.0 × 10 6 W tech: peak power output of GE's standard wind turbine 2.4 × 10 6 W tech: peak power output of a Princess Coronation class steam locomotive (approx 3.3K EDHP on test ...
The SI unit of radiant exposure is the joule per square metre (J/m 2), while that of spectral exposure in frequency is the joule per square metre per hertz (J⋅m −2 ⋅Hz −1) and that of spectral exposure in wavelength is the joule per square metre per metre (J/m 3)—commonly the joule per square metre per nanometre (J⋅m −2 ⋅nm −1).
The SI unit of irradiance is watts per square metre (W/m 2 = Wm −2). The unit of insolation often used in the solar power industry is kilowatt hours per square metre (kWh/m 2). [12] The Langley is an alternative unit of insolation. One Langley is one thermochemical calorie per square centimetre or 41,840 J/m 2. [13]
A power of 1 horsepower applied for 1 second [59] 7.8×10 2 J: Kinetic energy of 7.26 kg [91] standard men's shot thrown at 14.7 m/s [citation needed] by the world record holder Randy Barnes [92] 8.01×10 2 J Amount of work needed to lift a man with an average weight (81.7 kg) one meter above Earth (or any planet with Earth gravity) 10 3: kilo ...
Visible light such as sunlight carries radiant energy, which is used in solar power generation. In physics, and in particular as measured by radiometry, radiant energy is the energy of electromagnetic [1] and gravitational radiation. As energy, its SI unit is the joule (J). The quantity of radiant energy may be calculated by integrating radiant ...
Power density, defined as the amount of power (the time rate of energy transfer) per unit volume, is a critical parameter used across a spectrum of scientific and engineering disciplines. This metric, typically denoted in watts per cubic meter (W/m 3), serves as a fundamental measure for evaluating the efficacy and capability of various devices ...