Q2 - Quiz 2 - Physics 1C Name_ MULTIPLE CHOICE. Choose the...

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Quiz 2 - Physics 1C Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) A train passes a passenger platform at a constant speed of 25 m/s while sounding its horn (frequency=400 Hz). What overall change in frequency is detected by a person standing on the platform as the train moves from approaching to receding? Assume that the speed of sound is 330 m/s. A) 61 Hz drop B) 75 Hz drop C) 75 Hz increase D) 25 Hz drop E) None of the above 1) 2) The area of a typical eardrum is about 5.0 ˛ 10 -5 m 2 . Calculate the sound power (the energy per second) incident on the eardrum due to a lawn mower if the sound intensity is 100 dB (meaning 10 10 times more intense than the sound intensity at the threshold of hearing, which is 1.0 ˛ 10 -12 W/m 2 ). A) 5.0 ˛ 10 -5 W B) 5.0 ˛ 10 -6 W C) 5.0 ˛ 10 -7 W D) 5.0 ˛ 10 -8 W E) None of the above 2)
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Q2 - Quiz 2 - Physics 1C Name_ MULTIPLE CHOICE. Choose the...

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