# Homework 17 - Physics of Hearing-problems.pdf - hana...

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hana (mmh4627) – Homework 17 - Physics of Hearing – bradshaw – (121401)1Thisprint-outshouldhave50questions.Multiple-choice questions may continue onthe next column or page – find all choicesbefore answering.00110.0pointsAn ocean wave travels 10.6 m in 8.9 s.Thedistance between two consecutive wave crestsis 4.4 m.What is the frequency of the wave?002(part1of4)10.0pointsAM radio signals are broadcast at frequenciesbetween 550 kHz and 1600 kHz and travel2.99792×108m/s.What is the shortest AM wavelength?What is the longest AM wavelength?FM frequencies range between 88 MHz and108 MHz and travel at the same speed.What is the shortest FM wavelength?What is the longest FM wavelength?to a listener who is sitting 32.0 m from theorchestra?006(part1of2)10.0points2.6 kgWhatisthemassperunitlengthofthe string?The acceleration of gravity is9.8 m/s2.Answer in units of kg/m.007(part2of2)0.0pointsWhat is the wave speed when the suspendedmass is 2.6 kg?What is the frequency of the wave?009(part2of3)0.0pointsHow many complete waves are emitted in thistime interval?010(part3of3)0.0pointsAfter 0.342 s, how far is the front wave fromthe source of the sound?0110.0pointsWhat is the intensity of these sound wavesto a listener who is sitting 32.0 m from theorchestra?012(part1of2)10.0pointsThe decibel level of the noise from a jet air-craft is 130 dB when measured 17.6 m fromthe aircraft.How much sound power does the jet aircraftemit?

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