Question Details These two magnets with unlabeled poles are held close
together, as shown below
C2
C)
Label the poles of each magnet to indicate the
arrangement the magnets need to have to cause the
magnets to repel one another once they are released
(Label all four poles (the four gray boxes), two for each
magnet-one N for north and one s for south)
I

that would be because of both gravity and friction. so     c

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.

the maxium height is 34m/s

i think its d if wrong im sorry