A 75-kg person on skis is going down a hill sloped at 30.0 degrees above horizontal. The coefficient of kinetic friction between the skis and snow is 0.15. How fast is the skier going 10.0 s after starting from rest? Please show work A) 78m/s
B) 36m/s
C) 78m/s^2
D) 36m/s^2

measuring things 1 litre of water

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.

answer( sicar );

answer a fan shaped mass of sediment deposited at the base of a mountain front do to an abrupt change in stream gradient;