Phys Homework Set 1 Fall 2015 Exam Name

Transcription

1 Exam Name MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) Which of the following is a children s drawing toy that uses a circle within a circle to create beautiful patterns made up of two mutually perpendicular oscillations? 1) A) Ouija windmill. B) hookey stick, C) spirograph, D) Gee Haw Whimmey Diddle, E) notched stick with rotor 2) Which of the following prefixes multiplies a unit of measurement by a factor of one million? 2) A) kilo-, B) centi-, C) milli-, D) micro-, E) mega-. 3) An oscillator has a frequency of 1 GHz. What is its period of vibration? 3) A) 1μs, B) 1000 s, C) None of these. D) 1 s, E) 1 ms, 4) Which of the following show where the nodes and antinodes are located on a vibrating surface. 4) A) crystal wine glass, B) Kundt s tube, C) tap tone D) Tacoma Narrows Bridge. E) Chladni pattern 5) Which of the following are used by bats in order to catch flying insects for food in the pitch blackness of night? 5) A) sonoluminescence, B) sonar, C) piezoelectric transducer. D) echolocation, E) sonogram, 6) Which of the following is always perpendicular to the ray of a wave? 6) A) refracted ray, B) incident ray, C) wave front, D) normal. E) reflected ray, 7) What type of wave is produced by a point source located in the middle of a ripple tank? 7) - 1 -

2 A) Huygens s wavelets, B) coherent light. C) spherical wave, D) plane wave, E) circular wave, 8) Which of the following expresses the distance between successive crests of a wave? 8) A) propagation, B) velocity, C) period, D) wavelength. E) medium, 9) Which of the following produce a sound due to vibrating lips? 9) A) flute, B) clarinet, C) trumpet, D) drum. E) saxophone, 10) Which of the following equations tells how fast sound travels? 10) A) v = at. B) f = 1/T, C) d = vt, D) S = fλ, E) v = fλ, 11) Which of the following applies when causes motion simply by thinking about or willing it in his mind? 11) A) damping, B) coupling, C) psychokinesis, D) resonance, E) None of these 12) Which of the following always is an example of a two-dimensional wave. 12) A) longitudinal wave, B) transverse wave, C) slinky spring, D) rope, E) plate. 13) Which of the following represents a wave that has nodes and antinodes? 13) A) reflected wave, B) sum wave. C) incident wave, D) traveling wave, E) standing wave, 14) When an up pulse is sent from one end of a string and a down pulse is sent from the other, what happens when they reach the same location? There will be 14) - 2 -

3 A) no pulse (they cancel one another out). B) a single up pulse twice the size of the original, C) two up pulses the same size as the original, D) an up pulse and a down pulse, E) a single up pulse the same size as the original, 15) Which of the following illustrate a string vibrating in its fourth overtone? A) B) C) D) E) 15) 16) A mass is hung from a spring and set into simple harmonic motion. Which of the following is true? 16) A) Its amplitude increases with time. B) Its frequency decreases with time. C) Its amplitude decreases with time. D) Its frequency increases with time. E) Its amplitude remains constant with time.. 17) Which of the following expresses the concentration matter as mass per unit volume? 17) A) density B) pressure C) weight D) force E) mass, 18) Two SHM signals of the same frequency are sent to the x- and y-inputs of an oscilloscope. If the two signals are in phase so that they reach maximum amplitudes at the same time, what is the shape of the resulting Lissagous figure? 18) A) None of these. B) slanted straight line, C) horizontal straight line, D) circle, E) vertical straight line 19) Which of the following takes place when a transverse pulse wave traveling down a string is reflected off of a fixed end of a string? 19) A) overtones, B) harmonics, C) phase reversal, D) no phase reversal, E) wice the amplitude. 20) Which of the following symbols does the book use to denote the phase angle for SHM? 20) A) m, B) F, C) p, D) φ. E) ρ, 21) When two waves of the same amplitude but significantly different frequencies are heard at the same time, - 3 -

4 what happens? 21) A) They are always slightly out of phase with one another. B) Beats are heard, C) Two tones are heard. D) More than one of these. 22) Which of the following units is the standard MKS unit for force? 22) A) m/s2, B) kg/m3, C) cm/s. D) N, E) N/m2, 23) Sound is classified as which of the following types of waves? 23) A) vacuum. B) energy, C) transverse, D) work, E) longitudinal, 24) Which of the following is the least common method of exciting a violin string? 24) A) fixed end, B) free end, C) plucked string, D) bowed string, 25) Which of the following distinguish between the sound of a trumpet and a piano even when they are playing the same note at the same volume? 25) A) tone quality, B) pitch, C) loudness, D) None of these. E) More than one of these. 26) When a resonance tube vibrates in the open tube manner, it is 26) A) open at both ends, B) closed at both ends, C) More than one of these. D) open at one end and closed at the other, 27) What kind of node occurs at the open end of a resonant tube? 27) A) pressure node, B) pressure antinode, C) velocity node, D) More than one of theses. 28) An echo occurs when the direction of travel of sound waves change as they travel from one medium to - 4 -

5 another? 28) A) interference, B) reflection, C) diffraction, D) dispersion. E) refraction, 29) Which of the following equations gives the wavelength of a harmonic in terms of the fundamental wavelength? 29) A) λ N = λ 1 /N, B) f N = N f 1, C) v = fλ, D) 30) Which of the following pertains to a sound vibration below 20 Hz? 30) A) subsonic, B) sonic. C) supersonic, D) infrasonic, E) ultrasonic, - 5 -