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  1. There is a quantity called density. It is defined by density = mass / volume. Different objects can have different densities. So, objects of the same volume can have different mass. Water has a density of...

    分類:科學及數學 > 化學 2006年12月11日

  2. ...to the surface is the same, the thumbtack applies more pressure because the point concentrates that force into...solid boundaries or across arbitrary sections of fluid normal to these boundaries or sections at every...

  3. 2: Before putting the fiber into a kind of fluid , measure the mass of a piece of dry, non-contaminated....S. I suggest using tape water as the fluid for testing(because it's cheap and can be easily...

    分類:科學及數學 > 化學 2009年03月21日

  4. ... form fat and exposed in extra-cellular fluid . The nerve impulse or action potential, A.P...跳躍式傳導). A.P. can conduct signals more quickly if (1)reducing the electrical resistance,R...

    分類:科學及數學 > 生物學 2008年02月19日

  5. ...liquid (i.e. not limited to the surface) and is more vigorous. As such, you could still say that evaporation... transferred by direct contact. 6. A fluid is a substance that has no definite shape. ...

  6. ...might stay longer, as it need to go throught the small and large intestine to process, fluid food like drinks can absorb easily and also it only need to go through the kidney...

    分類:科學及數學 > 生物學 2007年03月04日

  7. you should learnt what is fluid mosaic model right????the bilayer of phospholipid structure can move sideway, although the cholesterol...

    分類:科學及數學 > 生物學 2009年01月02日

  8. ... been observed--essentially zero. Please go here to learn more : http://hivinsite.ucsf.edu/insite?page=ask-01-10-20 Personal comment: ...

    分類:科學及數學 > 生物學 2009年03月13日

  9. ...quot; regions are shielded from the surrounding polar fluid , causing the more hydrophilic "head" regions to associate with the cytosolic and extracellular...

    分類:科學及數學 > 生物學 2009年03月03日

  10. ...maintain the yacht upright. You may refer to the following web-page for more description on the keel: http://en.wikipedia.org/wiki/Keel