A) 3.14 J
b) 3.14 J
c) 2.50 m/s

can somebody explain the letter c?

Zeros that follow non-zeros numbers and are also to the right of a decimal point are significant

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 electronic structure or chlorine is 2.8.7 what is the electronic structure of fluorine?