Two speakers create identical 288 hz sound waves. a person is 1.47 m from speaker 1. what is the MINIMUM distance to speaker 2 for there to be CONSTRUCTIVE interference at that spot. (unit: m)

The particle p starts from rest at point a at time t = 0 and changes its speed thereafter at a constant rate of 2.8g as it follows the horizontal path shown. determine the magnitude and direction of its total acceleration (a) just before point b, (b) just after point b, and (c) as it passes point c. state your directions relative to the x-axis shown (ccw positive) and choose the angle with the smallest magnitude.