Question the lowest note on a grand piano has a frequency, Ask an Expert

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Question: The lowest note on a grand piano has a frequency of 27.5 Hz. The entire string is 2.00 m long and has a mass of 450g. The vibrating section of the string is 1.88m long.

Part A: What tension is needed to tune this string properly?

I want help to find what tension is needed to tune this string properly.

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