Abass guitar string is 89cm long with a fundamental frequency of 30hz.
what is the wave speed on this string?

= 53.4 m/s

Explanation:

Velocity of a sound is given by the formula;

Velocity = Frequency × 2 (Length)

Frequency = 30 Hz

Length = 89 cm, equivalent to 0.89 M

Therefore;

Velocity = 30 × 2 ×0.89

              = 53.4 m/s

Thus; the velocity or the speed of sound is 53.4 m/s

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i just did this and got a 100.

v=ir = 3x15 =45 v