A landfill for a county with a population of 65,000 people has a volume of
approximately 2.0 x 10°m°. If the county produces 6.2 x 10 kg of garbage
each year and the density of the garbage is assumed to be 410 kg/m", how
many years will it take the landfill to fill?

Aball with a mass of 275 g is dropped from rest, hits the floor and rebounds upward. if the ball hits the floor with a speed of 2.40 m/s and rebounds with a speed of 1.70 m/s, determine the following. (a) magnitude of the change in the ball's momentum (let up be in the positive direction.)