A string of length 0.800 is vibrating at 100 in its second harmonic and producing sound that moves at 340 .

A string of length 0.800 m is vibrating at 100 hz in its second harmonic and producing sound that moves at 340m/s .

What is true about the frequency and wavelength of this sound?
A:The wavelength of the sound is 0.800 .
B: The wavelength of the sound is 3.40 .
C:The frequency of the sound is 100 .
D:The frequency of the sound is 425 .

1. A
2. A,C
3. B
4. B, C

λ=v/f = 340/100= 3.4m (B)
f=100Hz (C) , ( fundamental frequency = 50Hz )
4. B,C