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thingy
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Doppler Effect- Observer On Angle To Source
Plz help- I've been working on this for 2 days and I'm down to my last teaspoon of coffee powder. Even having the answer didn't help!
I think sleepness is turning me into a zombie
...prehaps eating brains will help me solve this problem...
An ambulance is traveling at 84.0 km/h towards an intersection. Jim stops his car to give way to the ambulance as shown in the diagram. θ = 42.0 °.
http://oasis.phy.auckland.ac.nz/oasis/a/att/qtatt/888/2/52/amburightjimrest.gif
The ambulance has a siren which produces sound at a frequency of 2.8 kHz. Assume the speed of sound in air is 340.0 m/s. What is the doppler shift (Δf = f′–f) heard in the siren sound by Jim, when Jim and the ambulance are positioned as shown on the diagram above?
Ans: 0.148 kHz
I figured f' =f [ v/(v-v(source) ] then Δf = f′–f but no luck there![Frown :frown: :frown:](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
Does it have something to do with the angle?
Plz help- I've been working on this for 2 days and I'm down to my last teaspoon of coffee powder. Even having the answer didn't help!
I think sleepness is turning me into a zombie
An ambulance is traveling at 84.0 km/h towards an intersection. Jim stops his car to give way to the ambulance as shown in the diagram. θ = 42.0 °.
http://oasis.phy.auckland.ac.nz/oasis/a/att/qtatt/888/2/52/amburightjimrest.gif
The ambulance has a siren which produces sound at a frequency of 2.8 kHz. Assume the speed of sound in air is 340.0 m/s. What is the doppler shift (Δf = f′–f) heard in the siren sound by Jim, when Jim and the ambulance are positioned as shown on the diagram above?
Ans: 0.148 kHz
The Attempt at a Solution
I figured f' =f [ v/(v-v(source) ] then Δf = f′–f but no luck there
Does it have something to do with the angle?
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