a mass, m, oscillating on a horizontal spring is located at (t) a cos(ut), where w = and t is the period of the oscillation. for each question asking about a time t below find the first time, expressed in units of t, after t = 0 when the question is satisfied. (a) at what time t is x(t)- /3 七 2. cos- c) t (b) in terms of k, m, and a, write an expression for the maximum speed of the mass, umar /3 /4 (c) what is vz in terms of unaz when

Two loudspeakers, 5.5 m apart and facing each other, play identical sounds of the same frequency. you stand halfway between them, where there is a maximum of sound intensity. moving from this point toward one of the speakers, you encounter a minimum of sound intensity when you have moved 0.33 m . assume the speed of sound is 340 m/s.part a) what is the frequency of the sound? part b) if the frequency is then increased while you remain 0.21 m from the center, what is the first frequency for which that location will be a maximum of sound intensity? express your answer to two significant figures and include the appropriate units.