Please answer this question

Volume of the tank = 3m³

Mass of total water = 3,000 kg

Explanation:

Given:

Measurement of tank = 2m × 1.5m × 1m

Density = 1,000 kg/m³

Find:

Volume of the tank.

Mass of total water.

Computation:

⇒ Volume of the tank = lbh

Volume of the tank = 2m × 1.5m × 1m

Volume of the tank = 3m³

⇒ Mass of total water = Volume of the tank  × 1,000 kg/m³

Mass of total water = 3m³ × 1,000 kg/m³

Mass of total water = 3,000 kg

more than, less

less than, more

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.