Abook is placed on a table and a rock sits on top of a cliff. which statement is correct? a. both the book and the rock have kinetic energy. b. both the book and the rock have potential energy. c. the book has potential energy and the rock has kinetic energy. d. the book has kinetic energy and the rock has potential energy.

What is the acceleration of a spaceship that is initially at rest and then speeds up to 220 m/s in 20 seconds

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.

Write down two additional questions about earth's magnetic field that will make your presentation more informative.