Quantcast Doppler Effect: Precalculus homework help??? - XP Math - Forums

XP Math Home Sign Up FREE! | Sign In | Classroom Setup | Common Core Alignment PDF Version

Go Back   XP Math - Forums > Mathematics > Homework Help

Thread Tools Display Modes
Prev Previous Post   Next Post Next
Old 04-19-2013   #1
Join Date: Apr 2013
Posts: 1
Default Doppler Effect: Precalculus homework help???

The Doppler Effect (named after Christian Doppler) is the change in the pitch (frequency) of the sound from a source (s) as heard by an observer (o) when one or both are in motion. If we assume both the source and the observer are moving in the same direction, the relationship is: f' = fa(v-vo/v-vs)

where f' = perceived pitch by the observer
fa = actual pitch of the source
v = speed of sound in air (assume 772.4 mph)
vo = speed of the observer
vs = speed of the source

Suppose you are traveling down the road at 45 mph and you hear an ambulance (with siren) coming toward you from the rear. The actual pitch of the siren is 600 hertz.

a) Write a function f'(Vs) that describes this scenario.

b) If f' = 620 Hz, find the speed of the ambulance.
Denise44 is offline  

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

All times are GMT -4. The time now is 05:24 PM.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.
XP Math