posted by Priscilla .
A vibrating 1000-hertz tuning fork produces sound waves that travel at 340 meters per second in air. Points A and B are some distance from the tuning fork. Point P is 20. meters from the tuning fork.
1. If the waves are in phase at point A and B, what is the minimum distance separating points A and B in terms of wavelength?
2. If the vibrating tuning fork is accelerated toward point P, what happens to the frequency of the sound observed at P?