8. What is the mass of an object if a force of 34 N produces an acceleration of 4 m/s/s? F = 34 N
F
34
m-
m-
m = 8.5 kg
a
4
a - 4 m/s

Explanation:

The mass of the object can be found by using the formula

where

f is the force

a is the acceleration

So we have

We have the final answer as

Hope this helps you

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.