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O User Dashboard × Welcome . Lookin lime and Leave Rer·D https//acts pm s x fi S https: session.masteringphysics.com myctmasteringe assignment list/572892 malus's la Yaho /Mastering hysics x , e l O Identical LOLO × Plzza Hut Paza N ing ector meth x MastenPlysics: HW-04-MP-Chrom!um httpsy/session.masteringphysics.com/myct/itemView?assignmentProblemlD-851403438offset-prev PHYS 217 HWP xcise 16.51 MasteringPhysicS 4oI 51 ncxt .previous HW-04-MP Exercise 16.54 My Courses Part A The slren or a fhc angnc thar ls crtsing northward al 39 0 m/semits a sound ol frequency 218 IIx A truck In front of this ire engine is moving nerthwward at 150 Due. 09v/2117 11:69 PM Course Home rom the back of the truck? Score: 0.0% Scorcs eText 2360 Items Dynamic Study Modues 1. Dislance Costs Decizels Submit yAnawsrs GiveUn Sludy Aea 2. Exercise 16.4 . Exercise 18.49 . Exercise 18.54 5. Problem 15.S5 Incorrect Try Again; 6 attempts remaining Course Materials Part BExplanation / Answer
A] By dopplers formula,
f'' = f*[v-vo]/[v-vs]*[v+vs]/[v-vo] where v is velocity of sound, vo is velocity of truck, vs is velocity of siron, f is frequency emitted, f'' is frequency received back
f'' = 2180*[343-15]/[343-39]*[343+39]/[343+15]
= 2510 Hz answer
B] wavelength = speed/frequency
= 343/2510
= 0.1366 m
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