The practice of science can answer only scientific questions. And scientific question’s guide the design of investigations. What must be true of the
possible answers to a scientific question?
A. They could be shown to be false by evidence.
B. They support an established scientific theory
C. They do not require the use of physical measurements.
D. They are at odds with established scientific theories,

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.