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  1. Added Jul 17, 2007 by tomderis
  2. Added Apr 06, 2007 by battis and 1 other
    an interactive & quite extensive size comparison of the perception of our universe. Universcale starts from a proton (1 femtometer) goes over to a hydrogen atom (100 picometers), a protein nanometer (10 nanometer), & a red blood cell (7-8 micrometer), & ends at the moon (3,764km), a nebula (30 light years), & finally at the outer limits of our universe (13,7 billion light years).
  3. Added Mar 30, 2007 by brasst
  4. Added Mar 30, 2007 by brasst
    Welcome to Convert Plus! Here you can convert just about anything to anything else. You can easily perform online conversions (e.g. metric conversions) for many measurement systems both commonly used like metric and U.S. Avoirdupois and quite exotic like
  5. Added Feb 26, 2007 by aseldow
    Buros Institute of Mental Measurement: Tests that measure competencies and attitudes in any of the various areas of mathematics (e.g., algebra, geometry, calculus) and those related to general mathematics achievement/proficiency. (Note: Included here are tests that assess personality or affective variables related to mathematics.)
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