A string 2.0 m long and fixed at its ends is driven by a 240 Hz vibrator. The string vibrates in its third harmonic mode. The speed of the wave and its fundamental frequency is:

A string 2.0 m long and fixed at its ends is driven by a 240 Hz vibrat

1.	A string 2.0 m long and fixed at its ends is driven by a 240 Hz vibrator. The string vibrates in its third harmonic mode. The speed of the wave and its fundamental frequency is:
A.	180 m/s, 80 Hz
B.	320 m/s, 80 Hz
C.	320 m/s, 120 Hz
D.	180 m/s, 120 Hz
Answer» C. 320 m/s, 120 Hz