physics quiz 2 smith

physics quiz 2 smith - Quiz #2 Name_ 1PM Test Form A NOTE:...

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Quiz #2 Name___________________________________ 1PM Test Form A NOTE: You get + 1 point for each correct answer and - 0.25 points for each incorrect answer. It is not advantageous to fill in a guess for the answer unless you can eliminate more than one wrong answer. MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) Which of the following is NOT true of sound waves? A) Sound waves are transverse density waves moving through a material B) If you lower the temperature of air the velocity of sound will decrease C) The velocity of sound in a liquid depends on the density of the liquid D) Air molecules must collide with each other for sound to propagate E) All of the above are true 1) 2) The intensity level of sound at a rock concert is approximately 120 dB. Assuming that your eardrum is a circle with a radius of about 2 mm, how much energy is transmitted to your eardrum during a one hour concert? Assume the threshold of hearing is 1 x 10 - 12 W/m 2 . A) 0.093 Joules B) 0.61 Joules C) 1.89 Joules D) 0.045 Joules E) None of the above 2) 3) When I stand halfway between two speakers, with one on my left and one on my right, a musical note from the speakers gives me constructive interference. How far to my left should I move to
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physics quiz 2 smith - Quiz #2 Name_ 1PM Test Form A NOTE:...

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