What is the convection pattern between 30°S and 30°N latitude?(1 point) Hotter air rises and moves toward the equator, then cools and falls and moves away from the equator.

Cooler air rises and moves away from the equator, then warms and falls and moves back to the equator.

Hotter air rises and moves away from the equator, then cools and falls and moves back to the equator.

Cooler air rises and moves toward the equator, then warms and falls and moves away from the equator.

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.

conservation of mass

mass before something happens = mass afterwards