Two projectiles are launched at the same speed. Projectile #1 is launched with a velocity of 20 m/s at 30° above the horizontal. At which of the following angles listed below could projectile #2 be launched in order to have the same horizontal range as
projectile #1?

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.