What can be used to measure the volume of sand?
To determine the volume, we take a short length of the capillary tube and fuse the bottom end and use it as a vessel to fill with water to the very top, and into which to place the water-saturated grain, and fill it with water. Weigh it. Fill it again with water, and weigh it again. The volume in mL will be the difference in grams between the two weights.