Whose main job is to help a plant cell make proteins A .endoplasmic reticulum B. chloroplasts C. Mitochondria

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?

In an experiment, how can i change human errors? be specific.

Is there a point between a 10 nc charge and a 20 nc charge at which the electric field is zero?