The Lowest a on a Piano Has a Frequency of 27.5

Multiple Choice

The lowest A on a piano has a frequency of 27.5 Hz. If the tension in the 2.00-m string is 308 N, and one-half wavelength occupies the string, what is the mass of the wire?

A) 0.025 kg
B) 0.049 kg
C) 0.051 kg
D) 0.081 kg
E) 0.037 kg