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3. One type of steel has a density of 7.8 x 103
kg
and a breaking stress of
m3
N
7.0 x 108 ,. A cylindrical guitar string is to be made of 4.0g of this steel. (a) What
m2
are the length and radius of the longest and thinnest string that can be placed
under a tension of 900 N without breaking?
(b) What is the highest
fundamental frequency that this string could have?

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