PHY101 Quiz 2

PHY101quiz2file

ComposebyAliHassan

theadjacentrarefactioncenteris: a)0.75m b)1.5m c)3.0m d)needtoknowwavespeed Thespeedofsoundinmediumdependsupon

c)wavelength d)propertiesofthemedium Whichofthefollowingwillremainunchangedwhenasoundwavetravelsinairorin water?

b)Wavelength c)Frequency d)Speed Thevibrationsorthepressurevariationsinsidetheinnerairareconvertedintoelectrical signalsbythe____. a)cochlea b)tympanicmembrane c)pinna d)anvil Soundandlightwavesboth a)havesimilarwavelength b)obeythelawsofreflection c)travelaslongitudinalwaves d)travelthroughvacuum Amosquito' sbuzzisoftenratedwithadecibelratingof40dB.Normalconversationis oftenratedat60dB.Howmanytimesmoreintenseisnormalconversationcompared toamosquito' sbuzz? a)2 b)20 c)100 d)400 Pointwhereforcecausessystemtomovewithoutrotationis a)2timesbeyondcentreofmass b)edgeofthebody c)midpointofbody d)centerofmass Thefrequencywhichisnotaudibletothehumanearis a)50Hz b)500Hz c)5000Hz d)50000Hz Ifthespeedofsoundis340m/saplaneflyingat400m/screatesaconicalshockwave withanapexhalfangleof: a)0(noshockwave) b)32? c)40? d)58? Amunicipalwatersupplyisprovidedbyatallwatertower. Waterfromthistowerflows toabuilding. Howdoesthewaterflowoutofafaucetonthegroundfloorofabuilding comparewiththewaterflowoutofanidenticalfaucetonthesecondfloorofthe building?

a)Waterflowsmorerapidlyoutoftheground-floorfaucet. b)Waterflowsmorerapidlyoutofthesecond-floorfaucet. c)Waterflowsatthesamespeedoutofbothfaucets. d)Thespeedofwaterflowcannotbedeterminedunlesstheheightofthewater towerisknown.

theadjacenttotherarefactioncenteris: a)0.75m b)1.5m c)3.0m d)needtoknowfrequency (notconfirm) Aplaneproducesasonicboomonlywhen: a)itemitssoundwavesofverylongwavelength b)itemitssoundwavesofhighfrequencyitflysathighaltitudes c)itflysfasterthanthespeedofsound d)itflysfasterthanthespeedofsound accelerationofanobjectmustbezeroatapointwhere: