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pons    音标拼音: [p'ɑnz]
n. 桥



Pons
n 1: United States coloratura soprano (born in France)
(1904-1976) [synonym: {Pons}, {Lily Pons}, {Alice-Josephine
Pons}]
2: a band of nerve fibers linking the medulla oblongata and the
cerebellum with the midbrain [synonym: {pons}, {pons Varolii}]


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  • Why is cold fusion considered bogus? - Physics Stack Exchange
    In the past, after Fleischmann and Pons announced their cold fusion results, in perfectly good faith, they were proven wrong by subsequent experiments What are the experimental realities that make Fleischmann and Pons style cold fusions experiments easy to get wrong? Would the same risks apply to this new set up?
  • Why do I get negative entropy? - Physics Stack Exchange
    Yes, but I was trying to find the absolute entropy (like the one in the Boltzmann definition), not the Δ So I thought to do this Once we know that ΔS=Cln (T2 T1) we can split everything S2-S1=Cln (T2)-Cln (T1) and call S (n)=Cln (T (n)) I don't understand why I can't do it Thanks
  • Why do whips hurt so much? - Physics Stack Exchange
    The reason, a Whip hurts so much is that the tip of whip moves extremely fast, causing the skin to tear The reasoning behind this is easy to analyze from momentum conservation Lets take a convenient approximation, that the mass per unit length ($\rho$) does not vary through the length of the whip This is not how real whips are, but it will not affect the conclusion very much Initially, the
  • Is the E-cat by Andrea Rossi et al. for real?
    Rossi's device Unlike Pons Fleischmann cells, or variants like Arata's or SPAWAR, Rossi is claiming fusion of ordinary hydrogen in Nickel On the crazy-meter, Nickel-Hydrogen cold fusion is to Pons-Fleischmann cold fusion as Pons-Fleischmann fusion is to fire
  • Why does water reflect light? - Physics Stack Exchange
    Why does water reflect light? What is actually happening when light is reflected by water? We know why metals reflect light; water, however, is not metal, but it still reflects light and we can see
  • optics - How does quantum mechanics explain the color of macroscopic . . .
    A macroscopic substance is composed of countless fundamental particles in continuous mutual interaction with every other fundamental particle nearby Every interaction has associated, in-principle-quantized energy states A picture of the absorption or emission spectrum of such a substance would then look like a near continuum of infinitesimally thin lines However, everything in the substance
  • What is crystal orientation? - Physics Stack Exchange
    I have more details in the linked post Yes mobility depends on orientation So my question is what is exactly crystal orientation Is it the relative orientation of a crystal w r t the electric field, or to the substrate or to something else? And how the orientation is geometrically defined, for 2d crystals (in 3d crystals it seems we can use crystal plane; plz see what is quoted in the
  • Tour - Physics Stack Exchange
    Physics Stack Exchange is a question and answer site for active researchers, academics and students of physics and astronomy It's built and run by you as part of the Stack Exchange network of Q A sites With your help, we're working together to build a library of detailed answers to every question about physics, astronomy and astrophysics
  • Distribution of weight of an inclined object - Physics Stack Exchange
    We have a rod, 1m long and negligible height compared to the length, mass 10Kg uniformly distributed (center of gravity in the center) It is tilted theta degrees to the horizontal, and rests on two
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    The iconic cooling towers at most nuclear power plants are shaped like hyperboloids Wikipedia mentions that this is because the wide base promotes thin film evaporation and the narrow point accele





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