midterm1_07

midterm1_07 - Midterm 1 October 26, 2007 Put your name on...

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Physics 9B-C Midterm 1 October 26, 2007 Put your name on your blue book. Put your name on your blue book. There are six problems on two pages. Work problems on your blue book. Please put each problem on a new page (use front and back). Except for problem #1, no credit will be given for answers without work. Answers must have correct units. Remember that the grader must be able to understand your solution to give you partial credit; therefore, explain your solutions clearly and intelligently. Incomprehensible work will receive no partial credit. Good Luck! [1] Record the answer that correctly completes the sentence in your blue book. a) Waves generated by earthquakes are ( transverse | longitudinal both of the above | none of the above) waves. b) The velocity of sound is greater in ( air | steel | water ) . c) The equation (ıf/ı t ) - v (ıf/ı x ) = 0 describes waves traveling to the ( right | left | both of the above | none of the above ) . d) When two waves interfere destructively, the net intensity is proportional to ( I 1 - I 2 | | A 1 - A 2 | 2 ) e) A wave pulse in a dispersive medium will have ( only the amplitude decrease
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midterm1_07 - Midterm 1 October 26, 2007 Put your name on...

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