50 + 25 pts the other one was wrong

This map shows the Colorado River from the Hoover Dam to Lake Powell. Select whether the water of the river has potential energy (P. E.) or kinetic energy (K. E.) at each location listed below.
Hoover Dam:

Lake Mead:

Colorado River:

Glen Canyon Dam:

Lake Powell:

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.