What is tidal locking in relation to the Moon and Earth? A. The far side or "dark side" of the Moon is always in shadow making it impossible to see.

B. Tidal locking make the ocean tides on Earth produce two high tides and two low tides every 24 hours.

C. Tidal locking keeps the Moon in a synchronous orbit so we see only one side as it orbits Earth.

D. Tidal locking keeps Earth is a steady orbit around the Moon.

what is the speed of a softball that travels 20m in 2secs

speed = 20/2 = 10 m/s

i'm on my way to history not a mistory.

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.