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just for trivias(+_+)

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  • jayson
    Betamax (colloquially termed Beta) is an obsolete home videocassette tape recording format developed by Sony, and released on May 10, 1975. The cassettes
    Message 1 of 503 , Feb 1, 2009
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      Betamax (colloquially termed Beta) is an obsolete home videocassette
      tape recording format developed by Sony, and released on May 10, 1975.
      The cassettes contained 1/2 inch (12.7 mm) wide videotape in a design
      similar to the earlier, professional 3/4 inch (19.05 mm) U-matic
      videocassette format.

      Like the video home recording system VHS introduced by JVC in 1976, it
      had no guard band, and used azimuth recording to reduce cross-talk.
      The "Betamax" name came from a double meaning: beta being the Japanese
      word used to describe the way signals were recorded onto the tape, and
      from the fact that when the tape ran through the transport it looked
      like the Greek letter "Beta" (รข). The suffix -max came from "maximum"
      to suggest greatness.
    • jayson
      Galvanic corrosion is a process that degrades metals electrochemically. This corrosion occurs when two dissimilar metals are placed in contact with each other
      Message 503 of 503 , Feb 25, 2009
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        Galvanic corrosion is a process that degrades metals
        electrochemically. This corrosion occurs when two dissimilar metals
        are placed in contact with each other in the presence of an
        electrolyte, such as salt water, forming a galvanic cell. A cell can
        also be formed if the same metal is exposed to two different
        concentrations of electrolyte. The resulting electrochemical potential
        then develops an electric current that electrolytically dissolves the
        less noble material.
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