A skateboarder travelling at 10.4

m
s
10.4
s
m

10, point, 4, start fraction, start text, m, end text, divided by, start text, s, end text, end fraction starts getting chased by a grumpy dog. The skateboarder speeds up with a constant acceleration for
39

m
39m39, start text, m, end text over
3.3

s
3.3s3, point, 3, start text, s, end text. We want to find the acceleration of the skateboarder over the
3.3

s
3.3s3, point, 3, start text, s, end text time interval.

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.