How long does it take for a bicycle traveling 7.0 m/s to come to a stop if the brakes provide an acceleration of -3.5 m/s2
A. 7.0 S
B. 10.5 s
O C. 3.5 s
D. 2.0 s

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.