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quark    音标拼音: [kw'ɑrk]
n. 一种假设的素粒子

一种假设的素粒子

quark
n 1: (physics) hypothetical truly fundamental particle in mesons
and baryons; there are supposed to be six flavors of quarks
(and their antiquarks), which come in pairs; each has an
electric charge of 2/3 or -1/3; "quarks have not been
observed directly but theoretical predictions based on
their existence have been confirmed experimentally"
2: fresh unripened cheese of a smooth texture made from
pasteurized milk, a starter, and rennet [synonym: {quark cheese},
{quark}]


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  • Whats inside a quark? | Questions | Naked Scientists
    If you could break open a quark, what would you find inside?
  • Login | Naked Science Forum
    Login Owing to excessive bot scraping activity, we are currently restricting access to the forum to registered members only If you are not currently a member, it is easy to join, however, via the register button above, although you must also write to Dr Chris Smith by email - his first name and then at nakedscientists com - to confirm your reasons for wishing to join Please login below or
  • Finding the God Equation | Podcasts | Naked Scientists
    What is the symmetry? Four dimensional rotations in Lorentz space Now let's take a look at the quark model The quark model, which is a model for the inside of the proton, has three quirks If you rotate three quark among themselves, the equations remain the same It's symmetrical under something called SU (3)
  • Tetraquarks: new configurations of subatomic particles discovered
    Researchers using the Large Hadron Collider at CERN say they’ve recently discovered a new exotic form of subatomic particles called tetraquarks They exist for just fractions of a second, so they’re hard to spot and study But, luckily, University of Cambridge physicist Harry Cliff, is working on the experiment that discovered them, as he described to Chris Smith
  • The Large Hadron Collider (LHC) | Science Features
    The nucleus itself is made up of smaller particles, protons and neutrons, which in turn are made up of the 1st generation quarks - the up quark and the down quark The electron-neutrino is a neutral and almost massless particle that is spat out of nuclei during beta decay
  • Do the seeds in our diet actually benefit us? | Science Questions
    James - I'm delighted to be joined by nutritionist Sarah Berry who's going to help us answer this question Fraser is right, isn't he? Seeds can pass through our digestive system without actually being digested Sarah - It's a double-edged sword In one respect, by them passing through our system, it means that they actually have a lower energy content and the back of pack labelling would show
  • Seeing Red | Science Features - The Naked Scientists
    A tiny string vibrating in a different pattern would have the requisite properties to identify it as a quark, a neutrino, or any other kind of particle Thus String Theory claims that the vibrating string is an electron because it has all the properties of an electron
  • How much wheat to make a loaf of bread? | Science Questions
    Andrew - Whol meal flour is what you get when you grind up whole grains of wheat and take nothing out To make white flour, you lose about 25 per cent of the original grain, mostly the nutrient-rich brown layer and the vital wheat germ So, we need about 550 grams of wheat for our loaf How much land it takes to grow this depends on the farmer's production method Amy - I suppose production
  • Why do doctors remove air from syringes? | Science Questions
    When you are given an injection why is the doctor or nurse very careful to make sure there is no air in the barrel of the syringe? Because when you cut yourself it doesn’t matter, there’s air all around the wound
  • Climate shapes how languages evolve - The Naked Scientists
    Languages which rely heavily on tone to convey meaning are more common in warm, humid parts of the world, according to a recent study Tone is the variation in pitch which can be used to change the meaning of words or phrases In English, we use tone to affect the sentence as a whole, such as going up at the end to indicate a question





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