Water at a pressure of 4.80 atm at street level flows into an office building at a speed of 0.80 m/s through a pipe 6.80 cm in diameter. the pipes taper down to 2.50 cm in diameter by the top floor, 29.0 m above. calculate the water pressure in such a pipe on the top floor.

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.