Rank the following point charges according to the magnitude of the electric force experienced, from greatest to least. Specifically indicate any tles.
A. a charge of 3 nC at a point where the electric field is 70 N/C
B. a charge of 5 nC at a point where the electric fleld Is 600 N/C
C. a charge of 3 nC at a point where the electric field is 20 N/C
D. a charge of 6 nC at a point where the electric field is 35 N/C
E. a charge of 8 nC at a point where the electric field Is 10 N/C

-4 on

truck y has a greater velocity than truck x.

answer; how far out of place which the object finished relative to the starting location;

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.