Unit 6 Practice Quiz - ID C{’hysics Honors Intro Quiz...

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Unformatted text preview: ID: C {’hysics Honors Intro Quiz: Chapters 16 and 17 , I m , _(2n-1)t gas .M viva Equations. vmf/t L—--—-——4 Le 2 f mf vivS rmr m [f1 mm rec 2 an lOlog In x 1.0x 10423} F 0 Wild Multiple Choice Identify the choice that best completes the statement or answers the question. E. If the distance between a point sound source and a dB detector is increased by a factor of 10, what will be the reduction in intensity level? a. 16 dB e. 1.2 dB c. 20 dB (1. 0.5 dB e. 4 dB 2. To decrease the intensity ofthc sound you are hearing from your speaker system by a factor of 36, you can reduce the amplitude by a factor of and increase your distance from the speaker by a factor of a. two; 13. three; 0. twelve; d. four; e. three; three twelve three. three four 3. A wave generated in a medium is a longitudinal wave when a. there is a net transport of matter by the wave. the density of the medium is less than the density of water. molecular displacements are perpendicular to the wave velocity. molecular displacements are parallel to the wave velocity. the moiecules of the medium are unable to exert forces on each other. 999.0” 4. A train station bell gives off a fundamental tone of 500 Hz as the train approaches the station at a speed of 20 m/s. if the speed of sound in air is 335 m/s, what will be the apparent frequency of the bell to an observer riding the train? a. 500 Hz b. 250 Hz c. 1000 Hz d. 472 Hz e. 530 Hz 5. The speed of sound in air is a function of which one of the following? a. wavelength b. frequency 0. amplitude d. temperature e. All of these. 6. A friend hands you an equation sheet with the following equation for the Doppler effect: f: (V"vo)f' (v + vs) T his version of the equation is correct with signs as given only if a. the observer and source are approaching each other. b. the observer and source are moving away from each other. c. the observer is approaching the source while the source is moving away from the observer. d. the observer is moving away from the source while the source is approaching the observer. e. the observer and source are moving in perpendicular directions. 7. 10. An organ pipe open at both ends is 1.5 tn tong. A second organ pipe that is closed at one end and open at the other is 0.75 m long. The speed of sound in the room is 330 m/s. Which of the foiiowing sets of frequencies consists of frequencies which can be produced by both pipes? a. £10 Hz, b. '1 10 Hz, c. 220 Hz, d. 220 Hz, e. 330 HZ, 220 Hz, 330 Hz, 440 HZ, 660 Hz, 440 Hz, 3301-12 550 Hz 660 Hz 1100 HZ 550 Hz A student attaches a length of nylon fishing line to a fence post. She stretches it out and shakes the end of the rope in her hand back and forth to produce waves on the line. The most efficient way for her to increase the wavelength is to a. increase the tension on the hose and shake the end more times per second. decrease the tension on the hose and shake the end more times per second. keep the tension and frequency the same but increase the length of the hose. increase the tension on the hose and shake the end fewer times per second. decrease the tension on the hose and shake the end fewer times per second. 99553953" Two vibrating tuning forks, heid side by side, will create a beat frequency of what value if the individual frequencies of the two forks are 342 Hz and 345 Hz, respectively? a. 3Hz b. 3391i: c. 6871-12 d. LSHZ e. 343.5Hz Two ropes are spliced together as shown. The poise is moving toward the junction between the ropes. JL_____ Which of the following shows the ropes a short time after the puise shown in the diagram reaches the junction? a. ...
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