A 100 Kg Mass Is Attached to the End of a a 2.00

Multiple Choice

A 10.0 kg mass is attached to the end of a 2.00 m long brass rod, which has a diameter of 1.00 mm and negligible mass. The mass at the end is pulled, stretching the rod slightly, and then released. If the elastic modulus of brass is 9.10 × 10¹⁰ N/m², then the frequency of the resulting oscillations is

A) 6.20 Hz.
B) 7.51 Hz.
C) 7.95 Hz.
D) 8.21 Hz.
E) 9.51 Hz.