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Physics waves multiple choice question

The frequency of the first harmonic of a standing wave on a wire is 𝑓. The
length of the wire and tension in the wire are both doubled.
What is the frequency of the first harmonic as a result?
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I got square root2 / 2 but I cant get it in the form f/ squareroot2
(edited 5 years ago)
Original post by simple123site
The frequency of the first harmonic of a standing wave on a wire is 𝑓. The
length of the wire and tension in the wire are both doubled.
What is the frequency of the first harmonic as a result?


I got square root2 / 2 but I get it in the form f/ squareroot2


Well I haven't done the question, but √2/2 = √2/(√2√2).
Cancel out the √2 on the top and bottom to get 1/√2
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FP5
12
Which exam board are you with?
Original post by FP5
Which exam board are you with?

Aqa. Uploaded the question
Original post by 3pointonefour
Well I haven't done the question, but √2/2 = √2/(√2√2).
Cancel out the √2 on the top and bottom to get 1/√2



So basically rationalise the numerator?
Thanks.
Original post by simple123site
So basically rationalise the numerator?
Thanks.


Yep. No problem :smile:

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