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Quiz4 Apr-2009

Quiz4 Apr-2009 - Quiz 4 DL Name(last |_|_|(first Rubric...

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Quiz 4 DL # Name (last) (first) |___|___|___ Rubric Codes : Student ID: ____________________ first 3 letters last name I certify by my signature that I will abide by the code of academic conduct of the University of California. Signature ANSWERS WITHOUT WORK WILL RECEIVE NO CREDIT. MARK YOUR ANSWERS CLEARLY. You can use a CALCULATOR v=f λ 1) The following five cases show pictures of standing waves produced on two different strings. The strings have the same length, but the wave speeds are different, v A > v B . String A String B Case 1 -2 -1 0 1 2 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 x(m) -2 -1 0 1 2 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 x(m) Case 2 -2 -1 0 1 2 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 x(m) -2 -1 0 1 2 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 x(m) Case 3 -2 -1 0 1 2 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 x(m) -2 -1 0 1 2 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 x(m) Case 4 -2 -1 0 1 2 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 x(m) -2 -1 0 1 2 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 x(m) Case 5 -2 -1 0 1 2 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 x(m) -2 -1 0 1 2 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 x(m) a) In which of the five cases (there can be more than one) could f A =f B ? Justify your choice(s).

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