1. According to Dalton's Atomic theory which statement is correct from the following statement? 1.The atom is stable orbit.
2. The mass is distributed uniformly in an atom
3. The positive change is distributed throughout the atom
4. Obstruction will be in the centre of O the atom

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.)