quantum collision theory
121Drude model — electrons (shown here in blue) constantly bounce between heavier, stationary crystal ions (shown in red). The Drude model of electrical conduction was proposed in 1900[1][2] by Paul …
122Transition state — The transition state of a chemical reaction is a particular configuration along the reaction coordinate. It is defined as the state corresponding to the highest energy along this reaction coordinate. At this point, assuming a perfectly… …
123Second law of thermodynamics — The second law of thermodynamics is an expression of the universal law of increasing entropy, stating that the entropy of an isolated system which is not in equilibrium will tend to increase over time, approaching a maximum value at… …
124Eigenvalue, eigenvector and eigenspace — In mathematics, given a linear transformation, an Audio|De eigenvector.ogg|eigenvector of that linear transformation is a nonzero vector which, when that transformation is applied to it, changes in length, but not direction. For each eigenvector… …
125analysis — /euh nal euh sis/, n., pl. analyses / seez /. 1. the separating of any material or abstract entity into its constituent elements (opposed to synthesis). 2. this process as a method of studying the nature of something or of determining its… …
126Planck length — unit of length name=Planck length m=0.00000000000000000000000000000000001616252 accuracy=5 The Planck length, denoted by scriptstyleell P , is the unit of length approximately 1.6 times; 10−35 meters, 6.3 times; 10−34 inches, or about 10−20 times …
127Future of an expanding universe — Big Freeze redirects here. For other uses, see Big Freeze (disambiguation). Physical cosmology Univ …
128Photon — Photons émis dans le faisceau cohérent d’un laser Propriétés générales Classification Boson Composition Élémentaire Groupe …
