Two Samples of Water A and B have pH values of a 4.4 and 6.4 respectively. How many times more acidic sample A is than sample B

Cavitation is caused by

A soil sample has a void ratio of 0.5 and its porosity will be closed to

A borrow pit soil has a dry density of 17 kN/m³. How many cubic meters of this soils will be required to construct an embankment of 100 m³ volume with a dry density of 16 kN/m³.