AAMC Sample FL Chem/Phy Q27

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AAMC Sample FL Chem/Phy Q27

Post by PoincareConjecture » Thu Apr 06, 2017 4:57 pm

Someone please explain the reasoning behind the choice picked for answer; Why is choice C wrong with regards to the doppler effect on this question? Thank you.
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Re: AAMC Sample FL Chem/Phy Q27

Post by NS_Tutor_Andrew » Mon Apr 10, 2017 1:27 pm

Hi PoincareConjecture,

The key to getting this question is to recognize that the ultrasound transducer is in a fixed location, so it's velocity is 0. This means that you only have three terms to account for: both frequency terms and the velocity of the object. The end goal is to determine the velocity of the object, so all you need are the two frequency terms.

Hope this clarifies things!
Andrew D.
Content Manager, Next Step Test Prep.
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