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...he distance the object travelled [[Division (mathematics)|divided]] by the time. where <math>d</math> is the distance and <math>t</math> is the time that has gone by. ...

...are based only on properties of [[free space]]. The constants that Planck units, by definition, normalize to 1 are the: *[[Speed of light]] in a vacuum, ''c''; ...

.... Mass should not be confused with the related but quite different concept of [[weight]]. A large mass like the Earth will attract a small mass like a hu == Units of mass == ...

...ml | author = Herbert S. Bailey, Jr.}}</ref> The [[magnetic permeability]] of a complete [[vacuum]] is 4π×10⁻⁷ H/m (henry per meter). ...stitute of Standards and Technology]] provides guidance for American users of SI to write the plural as henries. People do not capitalize unit names.<!-- ...

# The flow of current and the voltage at each vertex in the network follows '''Kirchhoff' ...at vertex <math>u</math>, <math>\phi_{uv}</math> to denote the difference of voltage between <math>u</math> and <math>v</math>, i.e. <math>\phi_{uv}=V_u ...

[[File:World line.svg|thumb|Example of a light cone.]] ..., z) and one dimension of time. Minkowski spacetime has a metric signature of (-+++) and is always flat. The convention in this article is to call Minkow ...

...e change of velocity [[Division (mathematics)|divide]]d by the change of [[time]]. Acceleration is a [[vector]], and therefore includes both a [[size]] and ...is moving at 9.8 meters per second. The apple has accelerated. At the end of the second second, the apple is moving down at 19.6 meters per second. The ...

...y fast. The angular frequency is the [[Magnitude (mathematics)|magnitude]] of the vector quantity ''[[angular velocity]]'' which is also known as the '' [[Image:Angularvelocity.svg|thumb|294px|Angular frequency is a measure of how fast an object is rotating]] ...

This is used in a technique of [[absorption spectroscopy]] known as '''UV-visible spectroscopy'''. ...ption are from about 200 nanometers to 800 nanometers. This is a section of the electromagnetic spectrum pictured.<ref>Visbile and Ultraviolet Spectros ...

...;10⁶ seconds = 15.9735 days – [[Half-life (element)|half life]] of [[vanadium]]-48 *1.54&times;10⁶ seconds = 17.81 days – half life of [[californium]]-253 ...

...'''derivative''' is the steepness (or "slope"), as the [[rate]] of change, of a curve. The word "integral" can also be used as an [[adjective]] meaning " ...for ''summa'', [[Latin language|Latin]] for [[sum]]) to mean the summation of the area covered by an [[equation]], such as ''y'' = ''f(x)''. ...

...n. Because the flywheel resists changes in speed, it decreases the effects of uneven torque. [[Engine]]s which use [[piston]]s to provide power usually h ...rse, you wouldn't want to lug a heavy wheel around on a bus, so it is made of a lighter material that can withstand extremely fast rotation. ...

...entz force equation]], provide everything you need to calculate the motion of particles in electric and magnetic fields. ...ic fields 'circulate' around time varying magnetic fields, [[Faraday's law of induction|Faraday's law]]. ...

...a '''state''', as <math>X_t</math> represents the state of the process at time <math>t</math>. The model of stochastic processes can be very general. In this class, we only consider t ...

...a '''state''', as <math>X_t</math> represents the state of the process at time <math>t</math>. The model of stochastic processes can be very general. In this class, we only consider t ...

...a '''state''', as <math>X_t</math> represents the state of the process at time <math>t</math>. The model of stochastic processes can be very general. In this class, we only consider t ...

...]]. English translation: "Max Planck, discoverer of the elementary quantum of action ''h'', taught in this building from 1889 to 1928."]] ...inks the amount of [[energy]] a [[photon]] carries with the [[frequency]] of its [[electromagnetic wave]]. It is named after the physicist [[Max Planck] ...

...They are [[boson]]s, which means that they have a [[Spin (physics)|spin]] of 0 or 1. Both had been found in experiments by the year 1983. Together, they ...ta decay]]. In the late '70s, scientists managed to combine early versions of the weak force with [[electromagnetism]], and called it the [[electroweak]] ...

[[File:Complex Impedance.svg|200px|thumb|A graphical representation of the [[Complex plane|complex impedance plane]]]] '''Electrical impedance''' is the amount of opposition that a circuit presents to [[Electric current|current]] or [[vol ...

'''Special relativity''' (or '''the special theory of relativity''') is a theory in [[physics]] that was developed and explained ...e [[speed of light]] in all inertial frames of reference and the principle of relativity. ...