2. NASA stands for News Administration and Satellite Association. a True
b. False
23. Bolide is a large piece of space debris that crashes into a planet.
True
b. False
a.
24. Observing the black body curve of distant stars allows astronomers to determine age.
a. True
b. False
25. When giving coordinates for an object on the celestial sphere, the up and down position
given in degrees is called the right ascension.
a True
b. False
26. The moon exerts a greater influence than the
b. earth
because it is closer.
c. Jupiter
a. sun

The answer for #2 is FALSE

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.