A glass tube with inside diameter 150 m is placed in a water bath. (a) How high

A glass tube with inside diameter 150 μm is placed in a water bath.

(a) How high will the water rise inside the tube? Give your answer in cm.

(b) What will the water pressure be halfway between the free water surface and the water level in the tube (i.e., at hc/2)? Give your answer in kN/m2.

(c) If the tube is intended to model soil void size, what would the effective grain size of the soil be?

(d) What air pressure (+ or -) would have to be applied to the tube to get the water in the tube to rise 25 cm above the free water surface? Give your answer in kN/m2.?