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...'power''' (symbol: ''P'') is how fast [[Work (physics)|work]] is done or [[energy]] is given from one thing to another. In the [[SI]] system of measurement, As a rate of change of work done or the energy of a subsystem, power is: ...

...t [[heat]] produced by an [[electric current]], and second about how the [[energy]] of a [[gas]] relates to [[pressure]], [[volume]] and [[temperature]]. Joule's '''second law''' says that the [[internal energy]] of an ideal [[gas]] does not change if volume and pressure change, but do ...

...nstein]] found the [[equation]] for [[energy]]: [[E=mc²]]. This means that energy is equal to a certain amount of [[mass]]. However, this is a simplified ver ...because you get a [[divide by zero error]] from the equation for [[kinetic energy]], <math>E_k = m_0 ( \gamma -1 ) c^2 = \frac{m_0 c^2}{\sqrt{1-\frac{v^2}{c ...

*[[Kinetic_energy#Rotational kinetic energy|Rotational kinetic energy]] ...

...e terms of [[Bernoulli's equation]], which is essentially an equation of [[energy conservation]] for a fluid in motion. ...

...le [[light]] that excites [[electrons]] (makes them high [[energy]]). This energy causes an electronic transition from a ground state (non excited) to an exc == Energy absorption == ...

...es how fast the atoms are moving and the heat measures the total amount of energy due to the vibration of the atoms. ...toms allowing the energy to travel through the solid. (Rather like the way energy passes along a set of tumbling dominos). ...

...and antiparticles lead to the destruction of both. This gives rise to high-energy [[photons]] ([[gamma rays]]), [[neutrino]]s, and lower-mass particle–antipa ...ig number, this means that even a small amount of matter can have a lot of energy (it has been projected to be 4 times more effective per mass than nuclear f ...

...onservation of energy in physics. For energy resources sustainably, see: [[Energy conservation]].'' ...''[[first law of thermodynamics]]''' is a statement of the conservation of energy for thermodynamic systems. ...

== Relation of Energy and Vibration == ...attached to either end denoted by ''&mu;''. The formula used to relate the energy needed to cause a vibration in the bond is: ...

Note that there must be both voltage ''and'' current to transfer power (energy). For example, a wire can have a high voltage on it, but unless it is conne ...b. A negative voltage between points a and b is one in which 1 coulomb of energy is required to move a negative charge from point a to b. If there is a unif ...

在第二章中，我们学习了Budyko的能量平衡气候模型（Simple Energy Balance Climate Model），并用此模型来讨论了存在冰雪线的情况下，气候系统的稳定性问题。冰雪线的南北移动会引起行星反照率及热量的动力 ...

...lues relating to physical properties such as [[position]], [[momentum]], [[energy]], etc. The wave function can be thought of as a picture of how this partic ...he left hand side is equivalent to the [[Hamiltonian mechanics|Hamiltonian energy operator]] acting on <math>\Psi</math>. ...

...sion]]s between particles are [[elastic collision]]s and lose no [[kinetic energy]] ...

...s in far [[ultraviolet]] and even "soft" [[X-rays]].<ref>X-rays with lower energy</ref> ...wikt:brightness|brightness]]. Luminosity measures the <u/l>total amount of energy emitted</u/l> by a star or other astronomical object in [[SI]] units of [[j ...

An '''undulator''' is an [[insertion device]] from high-energy physics and usually part of a larger ...iation produced in an undulator is very intense and concentrated in narrow energy bands in the [[spectrum]]. The light beam is also [[Collimated light|collim ...

...would not be point-like particles, but rather 1-dimensional "strings" of [[energy]] that vibrate in various [[dimension]]s. The image to the right illustrate ...

...heir massive size (compared with other particles) it needs vast amounts of energy to create them. The [[Large Hadron Collider]] at [[CERN]] was built mainly ...to the amount of kinetic-energy that the gauge boson lost by being slowed, energy is conserved. ...

==Question1: Energy cycle== ...

...quilibrium constant of a reaction also helps you to understand the flow of energy that occurs during the reaction ([[thermodynamics]]).{{wiktionary|equilibri ...