phyiscs quiz1 smith

# phyiscs quiz1 smith - Exam Name 1\3 1) A form y1= 3 cos...

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Exam Name 1\3 NOTE: You get l point for each correct answer and -0.25 points for each incorrect answer. If you don't know how to solve the problem you are better off leaving the ansrlrer blank unless you can narrow down the choices. The same policy applies to the extra credit questions. MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) A r+'ave has the form y1= 3 cos (2nx/3) at t=0 seconds and is moving at a velocity of v=2 cm/s. A 1) second rvave has the form y2: -2 cos {2nx) at t-0 seconds and is moving at a velocity v=-1 cm/s. When the two waves collide (interfere) what is the height of the resulting wave at x=3 cm, t=5 seconds? A) 1.5 n\ Dt -1.:) c)2.s D) -2.s E) None of the above 2) Wave motion involves a transfer of which of the following from one place to another? (MCAT Z) question) A) energy only B) energy and momentum C) mass and momentum D) mass and energl' E) momentum only 3) A cup filled with water hanging from a striag forms a simple pendulum that makes small 3) oscillations with frequency f. Suppose that this cup develops a leak in the bottom such that the water slowly leaks out. What happens to the frequenry of oscillation? A) It stays the same B) It decreases C) It increases D) None of the above (Hint don't choose this answer) 4) A clocior uses an ultrasound transducer operating at a frequency of 10 n'rillic'rn Hz to examine a 4) patient for possible liver damage. lf &e speed of ultrasound in tissue is

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## phyiscs quiz1 smith - Exam Name 1\3 1) A form y1= 3 cos...

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