The colors of each section in the Periodic Table...

A: are the same on all Periodic Tables

B: are different on Periodic Tables

C: are just decoration

(Please help)

The diagram shows a person using a piece of gym equipment to lift weight which best describe the body in terms of simple machine

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 carts, one of mass 2m and one of mass m, approach each other with the same speed, v. when the carts collide, they hook together. assume that positive momentum is to the right. which graph best represents the momentum of both carts over time, before and after the collision?