Free fall in a vacuum: a steel ball and a pith ball with the same diameter are loaded into the top of a large drop tube, which is evacuated to create a very low-pressure environment. The two balls are released simultaneously from the same level to fall to the bottom of the tube. Which one of the following statements is true? a. Steel ball reaches the bottom first. Why?
b. Pith ball reaches the bottom first. Why?
c. Two balls reach the bottom simultaneously. Why?

like poles repel so keep pushing north to north and repels funny to see this

current and voltage can both be different in different parts of a circuit so it matters where you place the ammeter and voltmete

attach the statements so i can answer : )

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.