Originally Posted by
Alan Mendelson
Actually, Arc, if you want to make a bet on coin flips, be careful. US coins are not evenly weighted. The head side is heavier than the tails side. MIT did a study on this back in the 1960s. the reason is that the portrait contains more metal.
So in theory, US coins will be over time 50/50 heads or tails. in reality, heads is heavier and the heads side will settle down. If you flip the coin in your hand, you can reverse this.
I've often wondered if anyone ever tested the SuperBowl coins for their weight distribution? I'm going to assume that they carefully designed the coins to be equally weighted.