p A hockey player accelerates a puck (m = 0.167 kg) from rest to a velocity of 50 m/s in 0.0121s. The coefficient of friction between the puck and ice rink is 0.03. What is the force applied by the hockey stick to the puck?

scientific laws are the result of testing theories and proving them to be facts.

1 the 4 is sig

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 is slate

hope this