Can you name some skills you need to become independent? why do you need them?

Two polarizers are oriented at 40∘ to each other and plane-polarized light is incident on them. if only 16 percent of the light gets through both of them, what was the initial polarization direction of the incident light?

The coefficient of friction is a number that represents the resistance to sliding between two in contact with one another.

Name two kinds of practical electric pumps.