Which is a “big idea” of physical science? motion cannot be altered by forces. most of the mass of the earth consists of solid matter. the universe is getting smaller. energy can be transferred but it can never be destroyed.

Determine the fraction of the magnitude of kinetic energy lost by a neutron (m1 = 1.01 u) when it collides head-on and elastically with a target particle at rest which is 21h (heavy hydrogen, m = 2.01 u).

The flow of electrons from one atom to another is called

Give an example for each of the following situations: 1) negative acceleration, but positive velocity 2) positive acceleration and positive velocity 3) positive acceleration, but negative velocity 4) negative acceleration and negative velocity 5) positive velocity and no acceleration