In a hypothetical situation, a meteorite of mass 9 x 10^14 kg strikes Earth with a velocity of 10 m/s. Assume that the collision is elastic. Comment on the final velocities of Earth and the meteorite.

Diamond will scratch quartz. true or false

Consider a system to be two train cars traveling toward each other. what is the total momentum of the system before the train cars collide?   kg • what must the total momentum of the system be after the train cars collide?   kg •  

Which of the following is the phase that results when the moon is on the opposite side of the earth from the sun? a. quarter moon b. crescent moon c. new moon d. full moon