Friday, April 30, 2010

PH253: practice problems have solutions.

Same link as before, here.

10 comments:

  1. there is an extra zero in problem3 @ (6).....the answer should be (1.00504-1)mc^2=.00504

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  2. there is another boo-boo on problem 15; i calculated it a few times thinking i was wrong but i got the same answer everytime. K=104.8keV or 105keV for kila-electron-Volts not Mega.

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  3. whoops i mean K=.1048 keV or .105keV

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  4. How many formula sheets can we have for the final?

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  5. on 15, mc^2 = 511keV, not 0.511keV like the solution states, which gives K = 0.105MeV

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  6. if that is the case then K = 0.105MeV is the correct solution

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  7. Mr. Warren is right, the electron mass-energy was quoted incorrectly. K=0.105MeV is the right answer.

    Problem 3 is fixed as well, extra zero removed.

    You're allowed 2 sheets front and back, as stated previously.

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  8. @ Eq. 20 -- should we have c^2 divided by v, instead of by v^2?

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  9. Yes, Eq. 20 should be c^2/v, not c^2/v^2

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