Using a force of 200N, a hockey player does 500 J of work horizontally onto a puck that started from rest on frictionless ice. How far did the puck
travel?

The displacement is 2.5 meters

Explanation:

The formula for work is: W = Fs, where "W" is work, "F" is force, and "s" is displacement.

Since displacement is the shortest distance from start to finish, and the puck travels in a straight line, in this case, displacement = distance traveled.

Let's apply the formula:

The displacement is 2.5 meters

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.

a sonic boom is a loud boom that breaks the sound barrier

explanation: