The period of a mass-spring oscillator is 2.14 s. Every time the oscillator completes a full period, the amplitude of the oscillation gets reduced to 92.0 percent of the previous amplitude. How much time does it take for the amplitude to decay to 47.2 percent of its original initial value

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