Gravity causes a ball with a mass of 2 kilograms to accelerate at 9.8 meters per second per second. What is the force of gravity that acts on the ball? Question 4 options: 7.8 N 19.6 N 11.8 N 4.9 N

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