Atoms have no electric charge because they A. Have an equal number of charged and non charged particles.

B. Have neutrons in their nuclei.

C. Have an equal number of electrons and protons

D. Have an equal number of neutrons and protons

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?

The electric potential v is constant everywhere within a certain region of space. which statement below is true? the choices are: the electric field is also constant (but not zero) within the region. a charged particle placed within the region will experience an electric force. the electric field is zero everywhere within the region. the electric field varies from place to place within the region.

You have 80 g of 60oc water and 80 g or 10oc water. what is the final temperature when the two are mixed? explain.