A ball 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 2.20 m/s and rebounds with a speed of 1.80 m/s, determine the following. a) magnitude of the change in the ball's momentum (Let up be in the positive direction.)
b) change in the magnitude of the ball's momentum (Let negative values indicate a decrease in magnitude.)

Avertical clean glass piezometer tube has an inside diameter of d = 1 mm and is used to measure pressure in a horizontal pipe carrying water as shown. due to pressure in the pipe, the water at 20c rises into the tube to a height h. if the water pressure in the pipe is p = 500 pa gauge, estimate the height h: (a) without considering surface tension (b) with surface tension (capillary) effects. the contact angle  can be assumed at 30 deg