Which statement best describes the acceleration of a baseball? A The baseball rolls a distance of 4 meters in 1.5 seconds.
B The baseball moves at an average speed of 2 m/s.
C The baseball began at rest and rolls at a rate of 14.7 m/s after 1.5 seco
D The baseball rolls to the right at an average speed of 2

I need a lil bit of help I’m doing this for my friend

Which statement best describes the acceleration of a baseball?

A The baseball rolls a distance of 4 meters in 1.5 seconds.

B The baseball moves at an average speed of 2 m/s.

C The baseball began at rest and rolls at a rate of 14.7 m/s after 1.5 seco

D The baseball rolls to the right at an average speed of 2

C the baseball began at rest and rolls at a rate of 14.7 m/s after 1.5 seconds

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.