3. A school bus traveling at 22 m/s has a momentum of 150,000 kgm/s. What is the mass of the bus? *

Mass of bus = 6,818.18 kg (Approx.)

Explanation:

Given:

Velocity = 22 m/s

Momentum = 150,000 kg-m/s

Find:

Mass of bus

Computation:

Mass =  Momentum / Velocity

Mass of bus = 150,000 / 22

Mass of bus = 6,818.18 kg (Approx.)

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.

0.93xc=0.93x3x10^8m/s

2.54cm is 1 inch

360seconds i 1 hr