1. Absolute permeability of a core sample is being measured by water-flooding. The core sample is mounted in a transparent cylindrical tube, as shown in the figure below, and the air-water surface is monitored as function of time. The tube is placed in a vertical position and the water is assumed to flow through the whole core sample, evenly distributed over the surface. Calculate the absolute permeability of the sample when the air-water surface uses 400 seconds to move 18 cm. Water Core sample q Additional data: • Density of water is 1 g/cm³ • Water viscosity is 1 CP . . Gravitational constant is 980 cm/s² Thickness of the core sample is 2 cm 2 cm 100 cm 82 cm