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GR9677 #37
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Alternate Solutions |
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Comments |
Albert
2009-10-22 16:18:41 | Relativity is so glamorous! I love it.
Thank you, dear uncle Albert :)
|  | spacebabe47
2007-09-23 07:43:14 | Or, if you can't remember the formula, but you have seen any SR before you should know that the speed of the emitted electron will be greater than the atom (0.3 c) because they are traveling in the same direction, greater than the electron's speed in the rest frame of the atom (0.6c) because it is in a moving frame relative to the lab, but less simply adding the velocities (0.3c+0.6c=0.9c). This eliminates A,B, and E. A frame moving at 0.3c is fast enough to have a measurable impact on the velocity of the electron, so 0.76 seems more reasonable than 0.66c. Pick D.
sirius
2008-11-06 22:51:34 |
haha, sadly this is my typical approach to relativity. it's never the classical expectation, and its always faster than either of the particles alone. I nearly always choose the one thats slightly less than adding the two velocities. If only I had a better professor and a better text when I learned this stuff.
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