Which of the following statements is true? the side of the moon facing away from the earth is in perpetual darkness. the moon is visible only at night. the moon goes through a cycle of phases because it always has the same side facing the earth. the moon's distance from the earth varies during its orbit. if you observed the moon from north america and found that it was a full moon, then someone in south america would see a new moon.

If two parallel light rays hit a mirror, they will not be parallel to each other after they reflect.

How does the electric potential energy between two charged particles change if one particle is reduced by a factor of 3? a. increased by a factor of 3 b. it is decreased by a factor of 9 c. it is reduced by a factor of 3 d. it is increased by a factor of 9

Sawyer is studying diffraction. he draws a diagram of a plane wave to show how light waves travel. which best describes sawyer’s error? the wave fronts should be perpendicular to the direction in which the waves move. the arrow showing the direction of movement of the waves should be pointing to the left. the arrow showing the direction of movement of the waves should be pointing downward. the wave fronts should be both parallel and perpendicular to the direction in which the waves move.