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There's Gold in Them Thar Computers - 0 views

freezad.blogspot.com/...ld-in-them-thar-computers.html science physics electricity electrolysis chemistry reaction gold Au acid bleach
shared by Johnathan Fletcher on 30 Aug 10 - Cached
  • Johnathan Fletcher on 30 Aug 10
     
    Chemical extraction of gold from microprocessor electronics.
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Grey Company Trebuchet - 0 views

members.iinet.net.au/...howtreb.html science Physics trebuchet dynamics pumpkin launcher
shared by Johnathan Fletcher on 06 Oct 09 - Cached
  • Johnathan Fletcher on 06 Oct 09
     
    Some very simple counter-weight trebuchet theory.
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Grey Company Trebuchet - Simulator Links - 3 views

members.iinet.net.au/...tsims.html science Physics trebuchet dynamics simulations pumpkin launcher
shared by Johnathan Fletcher on 06 Oct 09 - Cached
  • Johnathan Fletcher on 06 Oct 09
     
    Building a trebuchet from scratch and finding the best proportions, weights, angles etc by trial and error certainly works ..well, that's how the Grey Co's first machines were done... but if you could model the rock-throwing beasts mathematically then think of the work and possibly wasted effort you could save.
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