(Solved): Figure 1: Problem 2 2. A string is attached a tuning fork with frequency 45Hz. The tension in th ...

Figure 1: Problem 2 2. A string is attached a tuning fork with frequency $45\mathrm{Hz}$. The tension in the string is maintained by a weight of mass $M=0.9\mathrm{kg}$. The tuning fork causes the string to vibrate, as shown in Fig. 1 , where $L=1.8\mathrm{m}$ The mass per unit length for the string is: A) $2.69\mathrm{g}/\mathrm{m}$ B) $5.38\mathrm{g}/\mathrm{m}$ C) $3.77\mathrm{g}/\mathrm{m}$ D) $6.46\mathrm{g}/\mathrm{m}$ E) $7.53\mathrm{g}/\mathrm{m}$