Amap of eastern north america, showing the ph of rainfall in the various states, indicates that the ph of rain in new york state varies from 4.22 to 4.40. according to these figures, the most acidic rainfall in new york state has a ph of?

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.)