Two small speakers, 0.650 m apart, are facing in the same direction. They are driven by one 677 Hz oscillator and therefore emit identical sound waves in phase with one another at the respective points of origin. (The speed of sound waves in air is 343 m/s.) (A) An observer wishes to stand in front of one of the speakers, at the closest point (i. e., smallest x-value) where intensity is at a relative maximum. At what distance x from the nearest speaker should she position herself? (Enter your answer in m.)
(B) The observer now wishes to stand at the closest point along that line where intensity is at a relative minimum. At what distance x should she position herself now? (Enter your answer in m.)

uranium fissions/breaks up giving out energy and neutrons

2b2t

explanation:

2b2t

speed of light in vacuum is 300,000 km/s

speed of light in other mediums is given by the expression v = c/n, where c is the speed of light in vacuum and n is the refractive index of medium.

for the first medium v = 200,000 km/s

  so, refractive index of medium = 300000/200000 = 1.5

    1.5 refractive index is usually for glass. so first medium is glass.

for the second medium v = 250,00 km/s

so, refractive index of medium = 300000/250000 = 1.2

    1.2 refractive index is usually for water. so second medium is water.

for the third medium v = 0 km/s

so, refractive index of medium = 300000/0 = ∞

    ∞ refractive index is usually for opaque mediums. so third medium is opaque medium.