Total amount of charge present in 1 kg of electron

Then, the total amount of charge present in 1kg of electron is: -1.76 x 10^11 C.

Explanation:

The charge of one electron is -1.602 x 10^-19 C and the mass of an electron is 9.11 x 10^-31 kg.

Then, the total amount of charge present in 1kg of electron is (1.602 x 10^-19) / (9.1 x 10^-31) = 1.7 x 10^11 C.

Then, the total amount of charge present in 1kg of electron is: -1.76 * 10^11 C.

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.