Question 6 of 10
2 Points
A spaceship has a momentum of 45,000 kg-m/s to the right, and a mass of
200 kg. What is the magnitude of its velocity?
A. 9,000,000 kg-m/s
B. 500 m/s
C. 225 m/s
D. 2500 m/s
SU

at positions a, g kinetic energy is maximum.

at position d, potential energy is maximum.

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.