Calculate the percent porosity of a series of rocks having spherical grains of radii 1, 2-, 4-, 8-, and 16-mm. The rock is a cube with a side (L) measuring 63 mm. Rock Sediments Side, mm Volume, mm³ Radius , mm Volume, mm³ No. of sediments in rock Total volume, mm³ Pore Volume, mm³ Porosity, % 1 2 4 8 16 Does the porosity change? Why?

Homework 1: a sample of rock has a total mass of 300 gm and a dry mass of 250 gm with a real specific weight of 2.77 and a degree of saturation of 80%. Find the following: Total volume, volume of solid particles, volume of voids, total density, dry density, void ratio, porosity, moisture content. Ans: V=152.75 cm³, V-90.25 cm³, V, 62.5 cm³, y-1.964 gm/ cm³, Ya 1. 64 gm/ cm³, e-0.693, n-0.41, and 6-0.2 ]