In the high jump, the kinetic energy of an athlete is transformed into gravitational potential energy without the aid of a pole. with what minimum speed must the athlete leave the ground in order to lift his center of mass 2.24 m and cross the bar with a speed of 0.710 m/s?

Which fators influence ocean currents

Aquarterback pedals 3.3meters southward and then run 5.7meters northward. whats the distance ? and whats the displacement?

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.