What is the acceleration of a body moving with a velocity of 30 m/s in a circle of radius 10 m

Diamond will scratch quartz. true or false

The air that we breath is made mostly of which gaseous molecule

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.)