Just a little question popped into my head on how much an electron weighs in atomic mass units, and how many electrons there would have to be in order to have the same mass as an up quark.
closed as off topic by David Zaslavsky♦ Dec 31 '11 at 3:00
Questions on Physics Stack Exchange are expected to relate to physics within the scope defined in the FAQ. Consider editing the question or leaving comments for improvement if you believe the question can be reworded to fit within the scope. Read more about closed questions here.