KnowHOW team explains: Water drops, or, for that matter, the drops of any other liquid, are spherical in shape due to a phenomenon called surface tension.In a liquid this acts on the surface of a ...

ρ is the density of air (about 1.2 kg/m 3).; A is the cross-sectional area of the object. If the object was a sphere, this area would be the area of a circle. C is the drag coefficient. This ...