Two identical steel balls are placed into containers with two different fluids, fluid a and fluid b. both containers have the same depth. both fluids have the same viscosity. the density of fluid a is larger than the density of fluid b. however, both fluids have a density less than that of the steel balls. which ball will reach the bottom of the container first?
a. both balls will reach the bottom at the same time
b. neither ball will ever reach the bottom
c. ball in fluid b
d. ball in fluid a

c. rb

explanation:

the atomic radius of a chemical element is a measure of the size of its atoms, usually the mean or typical distance from the center of the nucleus to the boundary of the surrounding shells of electrons.

the part of the wave he is travelling on is the crest

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.