Hurry pls! will give 50 points! ipe (pronounced ee-pay) is a brazilian hardwood that can be used as a durable (and expensive! ) construction material for decks, docks, and other outdoor projects. every cubic foot of ipe weighs 69 pounds. use dimensional analysis to convert the density of ipe to g/cm 3 . how does the density compare to other woods and materials on the list above?

explanation:

newton's third law, for every action there is an equal and opposite reaction.

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.