Which phrase describes density?
height of a point above sea level
force pushing on an area or a surface
amount of mass in a certain volume
amount of matter an object contains

In what direction does the medium move relative to the direction of the wave? explain.

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.

Debris produced by mining is called