What mathematics do you think I would need to do? Here, I'll measure
the period of a pendulum... Just a moment... about 1-3/4 seconds for my
little Swiss Army knife hanging on a thread. What math do you think I
used to get that result?

-- Jeff, in Minneapolis

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http://www.FreeMars.org/jeff/

"I find astronomy very interesting, but I wouldn't if I thought we
were just going to sit here and look." -- "Van Rijn"

"The other planets? Well, they just happen to be there, but the
point of rockets is to explore them!" -- Kai Yeves