A thundercloud has an electric charge of 43.2 C near the top of the cloud, -38.7 C near the bottom of the cloud and a distance betwee them of 1950 m. What is the Electric force between the 2 charges? Remember that Coulomb's constant (k) is equal to 8.99 *10^9 Remember F=(k*q1*q2) / r^2

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.

What is friction? how does it affect the motion of an object?

Diego kicks a soccer ball from the end line. his fellow students time and mark the soccer ball as it moves down the field. the graph represents the ball's progress. based on the graph, during what time is the velocity constant and positive?