An observer stands 3 m from speaker a and 4 m from speaker b. both speakers, oscillating in phase, produce 170 hz waves. the speed of sound in air is 340 m/s. what is the phase difference (in radians) between the waves from a and b at the observer’s location, point p?

What if? if the temperature near the cliff suddenly falls to 0°c, reducing the speed of sound to 331 m/s, what would the initial speed of the rock have to be (in m/s) for the soccer player to hear the sound of the splash 2.90 s after kicking the rock?

Awater slide of length l has a vertical drop of h. abby's mass is m. an average friction force of magnitude f opposes her motion. she starts down the slide at initial speed vi. use work-energy ideas to develop an expression for her speed at the bottom of the slide. then evaluate your result using unit analysis and limiting case analysis. express your answer in terms of the variables h, m, l, vi, f and appropriate constants. vf v f

Matter is needed to transfer thermal energy bya. conductionb. convectionc. radiation d. both a & b.