Here is an acceleration vs. time graph. what is the change in velocity between 2s and 4s?​

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.

Determine the age of a fossil if it had only one eighth of its original carbon-14 content remaining?

What was the first instrument to ever record an earthquake?