1) Inhabitants of the fifth planet in a solar system on the other side of the Galaxy measure distance in units called "ladoladelums" and time in units called "forevers". They observe that, a) all the planets in their solar system are much smaller than their Sun,

b) all planets have nearly circular orbits,

c)the fourth planet is about 32 ladoladelums from their Sun and completes one revolution in about 47 forevers, and

d) the third planet completes one revolution in 13 forevers.

Question: About how far from their Sun does the third planet lie?

step-by-step explanation:

we are given

we have to simplify it

firstly, we will factor it

now, we can cancel like terms

now, we can combine it

so, we get

b) phosphorus pentoxide

the answer is a. at 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.