Please help me this is due soon!!! 20 points! Write about a situation where it might be more useful to describe motion using velocity instead of speed.

Explain to someone who knows nothing about fossils the study of invertebrate paleontology and how it scientists understand the history of the earth. be sure your explanation contains a minimum of two complete sentences.

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?

How do the kidneys affect homeostasis