Aman stands at the midpoint between two speakers that are broadcasting an amplified static hiss uniformly in all directions. the speakers are 32.4 m apart and the total power of the sound coming from each speaker is 0.550 w. (a) find the total sound intensity that the man hears when he is at his initial position halfway between the speakers. w/m^2 (b) find the total sound intensity that the man hears after he has walked 3.6 m directly toward one of the speakers. w/m^2

Consider a double atwood machine constructed as follows: a mass 4m is suspended from a string that passes over a massless pulley on frictionless bearings. the other end of this string supports a second similar pulley, over which passes a second string supporting a mass of 3m at one end and m at the other. using two suitable generalized coordinates, set up the lagrangian and use the lagrange equations to find the acceleration of the mass 4m when the system is released. explain why the top pulley rotates even though it carries equal weights on each side.