Rotation of players should be done how? A. Clockwise movement

B. Counter-Clockwise movement

C. You don't have to rotate positions

D. Zigzag movement

Clockwise movement

Explanation:

Players rotate “clockwise” through each of these positions. Another way to remember it is the player in 1 serves first, the player in 2 serves next, the player in 3 serves third, and so on. The order of rotation is set at the beginning of the game and maintained throughout the game (excepting substitutions).

Hope this helps!! :))

the answer is c.)

explanation:

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.