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Why is it not the foot that matters when an athlete is crossing the line? And which part of the body does it count? Is it the head or the chest?
It's the athelete's torso, between shoulders and waist. Otherwise someone could stick their arms out and shave a fraction of a second off their time. Neil╦ 14:10, 12 July 2007 (UTC)
However, the arm itself doesn't count, only the shoulder, this is why you see athletes lunge forward, this is to ensure they gain an extra bit of distance, hence reducing their time Mrtechguy (talk) 03:51, 23 November 2009 (UTC)
In the cultural reference paragraph involving Futurama, there is some disagreement between whether the professor's statement is the observer effect or the uncertainty principle. The uncertainty principle only states that it's impossible to know everything about a small particle (i.e. can't observe its location and momentum at the same time). The observer effect is about the act of observing something leading to a change in state - the action of observing something might alter the object observed. So, the professor's comment refers to the observer effect, not Heisenberg's uncertainty principle. Lisatwo 01:30, 17 October 2007 (UTC)