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visits member for 3 years, 2 months
seen Oct 19 '13 at 23:28

Sep
24
awarded  Autobiographer
Sep
24
comment How much lead is there in the universe?
Well, I certainly got the answer I wanted, so this question's over...
Sep
24
accepted How much lead is there in the universe?
Sep
24
awarded  Critic
Sep
24
awarded  Supporter
Sep
24
comment How much lead is there in the universe?
No, actually, I am wondering whether the amount of lead is merely small (less than 1 / 10^3) or vanishingly rare (less than 1 / 10^60)
Sep
23
asked How much lead is there in the universe?
Aug
13
awarded  Scholar
Aug
13
accepted What is the highest energy position for a double pendulum? And for which energy positions is it chaotic?
Aug
8
awarded  Student
Aug
8
asked What is the highest energy position for a double pendulum? And for which energy positions is it chaotic?