When describing image formation for plane mirrors, what is an important rule to remember about light rays?
A. The angle is smaller in the medium that has the higher index of
refraction
B. The angle is smaller in the medium that has the lower index of
refraction
C. The angle when it leaves is larger than the angle when it hits
D. The angle when it leaves is the same as the angle when it hits

Which changes would result in a decrease in the gravitational force btween two objects? check all that apply

Two steel balls, each of mass m, are welded to a light rod of length l and negligible mass and are initially at rest on a smooth horizontal surface. a horizontal force of magnitude f is suddenly applied to the rod as shown. determine (a) the instantaneous acceleration a of the mass center g and (b) the corresponding rate at which the angular velocity of the assembly about g is changing with time.

The ability to make things happen is also called a. heat b. force c. matter d. energy