A 22.8 N crate starting at rest slides down a rough 4.3 m long ramp, inclined at 20.3 degrees with the horizontal. 17 J of energy is lost to friction. What will be the speed of the crate at the bottom of the incline

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.