Two cars both with a mass of 500 kg are traveling down a road the first car has a velocity of 65 m/s east and the second car has a velocity of 85 m/s west. • calculate the momentum of both cars showing the appropriate equation. • which car has the larger momentum? explain how you know.

Oxygen and hydrogen gas are at the same temperature t. what is the ratio of kinetic energies of oxygen molecule and hydrogen molecule if oxygen is 16 times heavier than hydrogen.

J. j. thomson’s experiment disproved the theory that an atom

Emmy kicks a soccer ball up at an angle of 45° over a level field. she watches the ball's trajectory and notices that it lands, two seconds after being kicked, about 20 m away to the north. assume that air resistance is negligible, and plot the horizontal and vertical components of the ball's velocity as a function of time. consider only the time that the ball is in the air, after being kicked but before landing. take "north" and "up" as the positive ‑ and ‑directions, respectively, and use ≈10 m/s2 for the downward acceleration due to gravity.