When excited electrons cascade to lower energy levels in an atom a)visible light is always emitted b)the potential energy of the atom increases c)the electrons always fall back to the first energy level d)the electrons fall indiscriminately to all levels e)the electrons fall back to a lower unfilled energy level

Name the intersection of plane bpq and plane cpq.

Amixture that has two or more substances that are spread out evenly is called a. compound b. heterogeneous c. substance d. homogeneous

To find the work done, the force exerted and distance moved are multiplied. a couch is moved twice before you are happy with its placement. the same force was used to move the couch both times. if more work is done the first time it is moved, what do you know about the distance it was moved? a) when more work was done, the couch was moved the same distance. b) when more work was done, the couch was moved less. c) when more work was done, the couch was moved further. d) when more work was done, the couch wasn't moved at all.