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Power in mechanical systems is the combination of forces and movement. In particular, power is the product of a force on an object and the object's velocity, or the product of a torque on a shaft and the shaft's angular velocity. Mechanical power is also described as the time derivative of work.
AC average power = W ... The Cambridge Handbook of Physics Formulas. Cambridge University Press. ... Physics for Scientists and Engineers: With Modern Physics ...
In physics and many other areas of science and engineering the intensity or flux of radiant energy is the power transferred per unit area, where the area is measured on the plane perpendicular to the direction of propagation of the energy. [a] In the SI system, it has units watts per square metre (W/m 2), or kg⋅s −3 in base units.
In physics, the Poynting vector (or Umov–Poynting vector) represents the directional energy flux (the energy transfer per unit area, per unit time) or power flow of an electromagnetic field. The SI unit of the Poynting vector is the watt per square metre (W/m 2 ); kg/s 3 in SI base units .
In the physics of gas molecules, the root-mean-square speed is defined as the square root of the average squared-speed. The RMS speed of an ideal gas is calculated using the following equation: v RMS = 3 R T M {\displaystyle v_{\text{RMS}}={\sqrt {3RT \over M}}}
Defining equation SI units ... Average wave power P 0 = Sound power due to source ... The Cambridge Handbook of Physics Formulas. Cambridge University Press.
biomed: average power consumption of a human cell: 10 −11: 1.84 × 10 −11: −77 dBm phys: power lost in the form of synchrotron radiation by a proton revolving in the Large Hadron Collider at 7000 GeV [6] 2.9 × 10 −11: −72 dBm astro: power per square meter received from Proxima Centauri, the closest star known 10 −10: 1 × 10 −10 ...
A gigawatt is typical average power for an industrial city of one million habitants, and is the output of a large power station. The GW unit is thus used for large power plants and power grids . For example, by the end of 2010, power shortages in China's Shanxi province were expected to increase to 5–6 GW [ 19 ] and the installation capacity ...