Waves/harmonic question
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Paper 1, Question 7.3
I have no idea what they are doing in that one, so any help will be appreciated (and in as much simplicity as possible
)
Paper 1, Question 7.3
I have no idea what they are doing in that one, so any help will be appreciated (and in as much simplicity as possible

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(Original post by 123chem)
https://drive.google.com/folderview?...1k&usp=sharing
Paper 1, Question 7.3
I have no idea what they are doing in that one, so any help will be appreciated (and in as much simplicity as possible
)
https://drive.google.com/folderview?...1k&usp=sharing
Paper 1, Question 7.3
I have no idea what they are doing in that one, so any help will be appreciated (and in as much simplicity as possible

the relationship between the speed of a wave, it's frequency and wavelength is:

from Newton's second law and some approximations (not going to walk you through this bit as it is complicated so just take the result as a given) the speed of a wave on a string is related to the tension,mass and length of a string by:

combining these gives us:

We can rearrange this to get:

we will now define


We can see from the diagram that we are in mode 3. The distance XY is given as 0.66m. We can calculate the fundamental frequency as:

substituting in our relation between the fundamental wavelength and the distance XY into our earlier relation we also find that:

we know the values of





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