Label the diagrams you see above. Image A: Image B: Part B: In 2-3 complete sentences, and explain the difference(s) between the two images.

How would you place two electrons on a sphere of radius r so that the electrostatic potential energy is minimized. how would you place three electrons to solve the same problem.

Aray of light traveling parallel to the principal axis of a concave mirror will be reflected through the mirror's

Ablock having mass m slides down an inclined plane. the force of friction between the block and the inclined plane is f, the block's weight is m g, and the normal force is n. (a) draw a free – body force diagram showing the forces acting on the block. (b) write down all relevant newton’s equations for a given situation.