Suppose that a P-wave ray produced by an ex plosion detonated 5 m beneath the ocean sur face travels down through the water and reaches solid rock on the ocean bottom at an angle of incidence i 30 degrees. P-wave speed is 1500 m/s in the water and 5000 m/s in the rock. a. How many reflected and refracted rays are generated by this incident ray? b. What is the angle of refraction of the re fracted P-wave ray?

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.