One busy air route across the Atlantic Ocean is about 5500 km. The now retired Concord, a supersonic jet capable of flying at twice the speed of sound was used to travel such routes (speed of sound 343 ). (a) How long did it take the Concord to cover the 5500 km route?

(b) How long did it take a typical subsonic jet flying at a speed of 90% the speed of sound (0.90 x 343 m/s) to cover the same route?

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.