Which of the following is NOT correct? I. The pltch of a sound note depends on the frequency of vibrations II. The intensity of a sound note is proportional to the amplitude of vibrations III. Beats are produces by two sources of sound because one wave is traveling faster than the other IV. When two sources of sound of frequencies \(500 \mathrm{~Hz}\) and \(50 \mathrm{~Hz}\) are sounded together, a neat frequency of \(2 \mathrm{~Hz}\) id observed V. The first harmonic of a note has double the frequency of the fundamental note
A. I and II B. II and III C. I and II D. III and IV E. IV and V
