Correct answer only ! which of the following is one of the main benefits of having an international system of units called si units? a. it has a long history. b. standards are based on body parts. c. standards are based on observable, reproducible natural phenomena. d. it was developed by the french.

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