A train travels south at 85 kilometers per hour for 5 hours. The train turns to the west and travels 100 kilometers per hour for the next hour. What is the train’s velocity during that final hour? A. 100 kilometers per hour west

B.15 kilometers per hour southwest

C.185 kilometers per hour

D.85 kilometers per hour southwest

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.