Apiano tuner stretches a steel piano wire with a tension of 765 n. the steel wire has a length of 0.700 m and a mass of 5.25 g . part a what is the frequency f1 of the string's fundamental mode of vibration?

We will use Mersenne's law that states:

Where f is fundamental frequency, T is the tension, is linear density(mass divided by length) and L is the length of the string. 
Let us find the linear density:

Now we just have to plug in all the number in the formula:

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Ithink it’s 98 because jajajjajansmsmjs