As the solar system cooled and developed, larger bodies were pushed away from its center by gravity.

Which configuration would produce an electric current? a) rotate a coil of copper wire between two magnets. b) connect a wire between a copper and zinc strip sitting in a beaker of water. c) connect a wire to the (+) positive end of a battery and the other end to a light bulb. d) connect a wire to the negative end of a battery and the other end to a light bulb.

Which accurately compares concave and convex lenses?

Where do magnetic lines of force enter earth?