Object 1 is moving along the x axis with an initial momentum +16 kg·m/s, where the + sign indicates that it is moving to the right. as the drawing shows, object 1 collides with a second object that is initially at rest. the collision is not head-on, so the objects move off in different directions after the collision. the net external force acting on the two-object system is zero. after the collision, object 1 has a momentum whose x component is +6 kg·m/s. what is the x-component of the momentum of object 2 after the collision?

their crystal patterns have been disrupted by stress

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.