Can yall help me please? Thank you.

J. j. thomson’s experiment disproved the theory that an atom

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?

Which component of the earth’s atmosphere is decreased due to photosynthesis?