Aboy throws a football horizontally from a window that is 2.8 m above the ground. if he throws the ball with a speed of 12 m/s, how far from the window does the ball land? a. 11.2 m b. 0.23 m c. 9.1 m d. 4.3 m

Explain vector addition, triangle method and parallelogram method

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.

Which notation is used to represent an alpha particle? a. b. c. d.