3) Two plane mirrors are set so they create a 90° angle between them (like in a corner). A ray of light
strikes one mirror at an angle of 60° to its normal. Determine the angle of reflection with respect
to the other mirror's normal. (Strikes one mirror, then reflect onto the other mirror, the reflects
off that mirror)

All the simple machines make work easier to do by changing the or of a force. a. size; type b. work; type c. size; direction d. type; direction

30 points - when can a theory be modified if a new type of technology allows for new observations that raise new questions? a. immediately, while the questions about the theory are being asked b. after new hypotheses related to the theory are tested in experiments c. only after the new observations disprove all parts of the theory d. while scientists begin to think about how the theory could improve

Which of the following is the phase that results when the moon is on the opposite side of the earth from the sun? a. quarter moon b. crescent moon c. new moon d. full moon