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    Physics Help

    What superconducting materials are used in the magnetic levitation of trains?
  2. A

    help*

    im currently studying David Williamsons play "The Club", would anyone have past or recent notes for this study. if you could please email them to me would be much appreciated. *astroboy*
  3. A

    help please*

    hey would anyone have notes from the aeronautical and telecommunication modules. if you could email them to me would be much appreciated. *astroboy*
  4. A

    questions?

    what gas and gas pressure is used in neon tubes for advertising signs? why are x-rays produced when electrons collide with heavy atoms? what material has the highest transition temperature and what is this temperature? *astroboy*
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