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# Standing waves - show that 8 loops are formed ? watch

1. I'm able to do (a) and (b).

Part (C) is where the problem lies.
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2. (Original post by Ari Ben Canaan)
I'm able to do (a) and (b).

Part (C) is where the problem lies.
If you let the length of the string be L
then in the first case there are N loops and each loop is 10cm
so
L = 10N
in the second case there are N+2 loops and each loop is 8cm
so
L = 8(N+2)

solve for N
3. (Original post by Stonebridge)
If you let the length of the string be L
then in the first case there are N loops and each loop is 10cm
so
L = 10N
in the second case there are N+2 loops and each loop is 8cm
so
L = 8(N+2)

solve for N
Ah, yes. Excellent !

Thank you !

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