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**1. Homework Statement**

A 138 cm length of string has a mass of 4.98 g. It is stretched with a tension of 6.35 N between fixed supports. What is the wave speed for this string?

**What is the lowest resonant frequency of that wave?**

(wavelength) = 138cm = 1.38m

M = 4.98g = 0.00498kg

Ft = 6.35N

v = 41.9m/s

(It's a two part question, i already know the speed is right, it's the second half i'm having trouble with)

**2. Homework Equations**

I've tried all the equations i can think of that have ƒ in them

(Wavelength) = (1 / ƒ) * ( √(T / µ))

V = (Wavelength) / T

ƒ = 1 / T

**3. The Attempt at a Solution**

(Wavelength) = (1 / ƒ) * (√ T / µ)

(Wavelength) = (1 / ƒ) * (v)

(Wavelength) = (1 / ƒ) * (41.9)

(1.38)(41.9) = (1 / ƒ)

(0.0329) = (1 / ƒ)

ƒ = 30.4Hz

that's always the answer i get no matter what i try, and it's always wrong.

What's going on?