to the resistivity of a metal or semiconductor. The effect is quantum-mechanical in nature and has the following origin: In a disordered electronic system‚ the electron motion is diffusive rather than ballistic. That is‚ an electron does not move along a straight line‚ but experiences a series of random scatterings off impurities which
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Michal Pogorzelski 5/25/10 Parallel Universe Theories The Theory of Parallel Universes The multiverse is a theory in which our universe is not the only one‚ but states that many universes exist parallel to each other. These distinct universes within the multiverse theory are called parallel universes. A variety of different theories lend themselves to a multiverse viewpoint. Not all physicists really believe that these universes exist. Even fewer believe that it would ever be possible
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3.1 & 3.2 Chemistry Notes Dalton * In 1805‚ John Dalton reintroduced the idea to explain 3 fundamental principles Experimental Work * Atoms of different elements have different properties * Law of definite proportion and multiple compositions: atoms of 2 or more elements can combine in a fixed ratio to form new substances depending on their combining capacities (eg. H2O vs H2O2) * Law of conservation of mass: atoms cannot be created or destroyed during a chemical reaction
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mysterious phenomenon. This was my motivation to leave Vietnam and Russia to join Erasmus Mundus program Nanoscience & Nanotechnology to learn more about physics‚ quantum physics‚ nanoscience and nanotechnology. My curiosity and love for physics lead me to concentrate mainly on mesoscopic physics‚ quantum coherence transport of electrons‚ quantum dots and graphene. In addition to these theoretical knoledges‚ I also acknowledge the importance of practical skill in using preparation‚ ranging from top-down
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asudhaiva Kutumbakam is a philosophy that inculcates an understanding that the whole world is one family. It is a philosophy that tries to foster an understanding that the whole of humanity is one family. It is a social philosophy emanating from a spiritual understanding that the whole of humanity is made of one life energy. If the Parmatma is one how then an Atma can be different? If Atma is different how then can it ultimately be dissolved in the Parmatma? If the whole ocean is one how then a drop
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If I tried to simply tell a skeptic‚ "That rock will fall from the cliff because of gravity‚" he won’t believe me because he will simply say‚ "Not necessarily." In fact‚ this can be the skeptic’s answer to just about any attempt to refute his position. It has long been pointed out by opponents of skepticism that such an attitude cannot be taken to its extreme conclusion in the real world in which we operate- even skeptics must live their lives according to rules they must rely upon not to fail
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and photoelectric effect 20. Electron’s energy is quantized‚ meaning that electrons jump by steps of QUANTA 21. Electron’s configuration a. electrons are in orbitals – place of higher probability of finding the electrons in an atom b. the four quantum numbers: n‚ l‚ m‚ s c. main energy level of an electron is
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/ B . b.bv.vbgvb;.Feynman‚ Richard Philips (1918-1988) Portions of this entry contributed by Leonardo Motta American physicist who was born in New York City on May 11‚ 1918. He grew up in Far Rockaway‚ Queens and when he was about 10‚ he started to buy old radios to use in his "personal laboratory‚" a collection of electric gadgets and components‚ and by the age of 12‚ he was already fixing radios in his neighborhood. Feynman related a number of entertaining and revealing vignettes from
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Problem: For a p-electron‚ orbital angular moment is (A) √2h (B) h (C) √6h (D) 2h Solution: Orbital angular momentum L = √l ( l + 1 )h where h = h/2π ∴ L for p electron = √1 ( 1 + 1 )h = √2h ∴ (A) Problem: For which of the following species‚ Bohr theory doesn’t apply (A) H (B) He+ (C) Li2+ (D) Na+ Solution: Bohr theory is not applicable to multi
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such conditions‚ a large fraction of the bosons occupy the lowest quantum state‚ at which point quantum effects become apparent on a macroscopic scale. These effects are called macroscopic quantum phenomena.Although later experiments have revealed complex interactions‚ this state of matter was first predicted‚ generally‚ in papers by Satyendra Nath Bose and Albert Einstein in 1924–25. Bose first sent a paper to Einstein on the quantum statistics of light quanta (now called photons). Einstein was impressed
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