PR_Exam1 scinece - Science and Technology of Musical Sound...

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1 Science and Technology of Musical Sound Physics 1251 Practice Examination Unit 1 Fundamentals of Musical Sound Answer all the questions. You use a calculator (if necessary) and a number 2 pencil. 1) Sound is a) Music only. b) Radio waves traveling at the speed of light. c) Energy propagating by means of longitudinal pressure/displacement waves produced by a vibrating object. d) Limited to frequencies above 20 kHz. e) Transverse waves propagating in air. 2) What is the frequency of a sound wave whose period is 25 msec? a) 25 kHz. b) 0.04 Hz. c) 250 Hz. d) 344 Hz. e) 40 Hz. 3) What is the speed of sound in water if its frequency is 1000 Hz and its wavelength is 1.5 m? a) 667 m/s b) 1500 m/s c) 344 m/s d) 1000 m/s e) none of the above. 4) Longitudinal waves are a) visible at sporting events when fans "do the wave" around the arena. b) Demonstrated by water waves. c) The same as transverse waves. d) Characterized by regions of compression and rarefaction. e) Defined by a medium oscillating perpendicular to the direction of motion of the wave. 5) What is the speed of sound in air when the temperature is 0C? a) 323 m/s b) 331 m/s c) 343 m/s d) 355 m/s e) 363 m/s 6) Pressure is a ) m e a s u r e d i n N e w t o n s . b ) D e c r e a s e d w h e n t h e a r e a i s r e d u c e d o v e r w h i c h a f o r c e i s a p p l i e d . c) Area per force. d) Force per area. e) Force divided by mass.
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2 7) What is the frequency of a sound wave that has a wavelength at 20C of precisely two meters? a)
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This note was uploaded on 02/16/2011 for the course BUSI 3830 taught by Professor James during the Spring '11 term at University of North Texas Health Science Center.

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PR_Exam1 scinece - Science and Technology of Musical Sound...

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