Amass of 0.8 kg hangs from a vertical spring in the lab. the spring stiffness is 400 n / m. you pull the mass down by 4 cm, then release it from rest to set the system in motion. what is the maximum velocity of the mass during the motion

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