When personal information stored digitally on a computer is accidentally deleted, what happens to it?
A. The information is gone if the data is overwritten.
B. The information is backed up as analog storage.
C. The information is always easily restored.
D. A computer virus is formed by the information.

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