Asprinter accelerates from rest to a velocity of 12m/s in the first 6 seconds of the 100 meter dash .
a ) how far does the sprinter travel during the first 6 seconds ?
b ) how much farther does the sprinter have to travel to reach the finish line ?

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.