Adam finds a fossilized shell with thin growth lines. which of the following is the most likely conclusion? a. the environment in which the organism lived was very pleasant. b. the organism experienced poor environmental conditions. c. the area where the fossil was found was once covered in ice. d. the past climate was very warm and tropical.

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.