Which of the following best describes accelerationa. acceleration is the rate of change of position of an object. b. acceleration is the rate of change of the direction of an object. c. acceleration is the rate of change of force of an object. d. acceleration is the rate of change of velocity of an object.

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