When a source of sound is in motion towards a stationary observer, the effect observed is
A. increase in the velocity of sound only
B. decrease in the velocity of sound only
C. increase in frequency of sound only
D. increase in both the velocity and the frequency of sound
Answer:C
When a source of sound is in motion towards a stationary observer, the effect observed is
A. increase in the velocity of sound only B. decrease in the velocity of sound only C. increase in frequency of sound only D. increase in both the velocity and the frequency of sound