Posted by Rachel | Posted in Gourmet Coffee | Posted on 07-05-2010
Tags: au, fic, original, original medium, original medium art, original medium digital, original medium pillow, original mediums communication method, rps, slash
What is the speed of the waves from the first source in the original medium?
Two vibrating sources emit waves in the same elastic medium. The first source has a frequency of 25 Hz while the frequency of the second source is 75 Hz. Waves form the first source have a wavelength of 6.0 m and they reflect from a barrier back into the original medium with an angle of reflection of 25 degrees. Waves from the second source refract into a different medium with an angle of incidence of 35 degrees. The speed of the refracted waves is observed to be 96m/s. What is the speed of the waves from the second source in the original medium and explain. (Some of the info may be irrelevant there is more than one part to the question)
So,….. determine the speed of the 1st. source, and you have the answer(s).
Wavelength is 6.0 metres. Frequency is 25 hz. So velocity of wave is (6 x 25) = 125 metres/ sec.
The second source has to have the same velocity, it’s the same medium! Only the frequency and wavelength are different. That’s irrelevant to the speed.
Lesson 2d – Conditionals – English Grammar
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