Martin Ling <martin@nodezero.org.uk> asks about strong materials:
Sapphire whiskers (Al2O3) is the strongest material that has been
measured, a cable 2 inches across could support 10,000 tons.
Carbon nanotubes (bucky tubes) are almost certainly stronger but to
my knowledge a precise strength measurement hasn't been made.
Theoretically the strongest of all could be C3N4 if somebody could
make some, but nobody has yet.
John K Clark jonkc@att.net
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