1.) Suppose the sound from an approaching train whistle normally has a frequency of 1200 cycles per second, but the train is approaching at 50 meters per second. How would the Doppler Effect change the wavelength of the sound? (speed of sound 335 meters per second; I would like a quantitative answer here for full credit)(adsbygoogle = window.adsbygoogle || []).push({});

So far I have done the following: c = wavelength (frequency)

335 = wavelength (1200)

335/1200 = wavelength

wavelength = .279

wavelength = 2.79 x 10^-1 meters

c = wavelength (frequency)

335 = wavelength (1200 + 50)

335/1250 = wavelength

wavelength = .268

wavelength = 2.7 x 10^-1 meters

These are the forumlas I have from class, but I don't know any other way to solve the problem or if it is right.

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Doppler Effect Problem

Can you offer guidance or do you also need help?

Draft saved
Draft deleted

**Physics Forums | Science Articles, Homework Help, Discussion**