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# Physics waves questions HELP!!! Watch

1. Need help with this waves question, please can some one help? With question 1a and b?
2. For part (a) you can use v = f x ƛ
For part (b) you use your answer from part (a) using the same equation. Remember, in a fundamental wave the length is half of the wavelength
3. (Original post by PhysicsIP2016)
For part (a) you can use v = f x ƛ
For part (b) you use your answer from part (a) using the same equation. Remember, in a fundamental wave the length is half of the wavelength
So for the second part use speed from a and half of the wavelength?
4. (Original post by metrize)
So for the second part use speed from a and half of the wavelength?
Yeah so you know that the speed of the wave must be the same, the fundamental harmonic is when in this case the 0.87m is the wavelength/2 value. From there you can calculate the frequency of the fundamental.

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