A sand grain settling in a fluid with a high concentration of like sand grains falls more slowly than if it were the only settling grain (Richardson and Zaki XXXXXXXXXXExplainwhy. Explainthe effect of...

A sand grain settling in a fluid with a high concentration of like sand grains falls more slowly than if it were the only settling grain (Richardson and Zaki 1954). Explainwhy.

Explainthe effect of temperature onthe fall velocity of sand. How much variationduring a year might there be onthe fall velocity associated with a sand grain with a 0.4 mm diameter?