Given specific value of parameter r =6.9 a, calculate the actual numerical ratio E(r)/E(2r) of magnitudes of the electric fields at point P for two different distances, r and 2r, in each of the configurations. This numerical ratio would then be approximately represented by 2n for scaling E(r) ∝ 1/rn, and that's how you determine

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