I think it’s A, I’m so sorry if I’m wrong.
To solve this question, we use the wave equation which is:
C=f*λ
where:
C is the speed;
f is the frequency;
λ is the wavelength
So in this case, plugging in our values in the problem. This will give us:
C = 261.6Hz × 1.31m
= 342.696 m/s is the answer.
No, one more group must get the same result as the other group. This will make it more reliable and reproducible.
