A golfer hits a ball and gives it an initial velocity of 40 m/s , at an angle of 30 degrees above the horizontal. a. How long did the ball stay in the air?

b. How far horizontally did the ball travel before hitting the ground?

An ambulance emits a frequency of 450 hz from its siren. what frequency is heard by a man as the ambulance moves toward him? less than 450 hz more than 450 hz 450 hz 0 hz

Lymphocytes known as blastocysts make antibodies that fight infection. select the best answer from the choices provided t f

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.