Two small nonconducting spheres have a total charge of 95.0 μc . (a) when placed 1.19 m apart, the force each exerts on the other is 11.0 n and is repulsive. what is the charge on each?
enter your answers in ascending order separated by comma.
(b) what if the force were attractive?
enter your answers in ascending order separated by comma.

the answer is b i think

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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.