3 - What does C mean in the resistance force equation given by the expression R=(CρAV^2)/2 for an object falling in air?    a) the density of the air   B) buoyant force exerted by air  NS) cross-sectional area of ​​the falling object       D) coefficient of resistance   TO) speed of the object

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Density of Solids

The density of a substance refers to how much matter is present in a given amount of space. It is expressed as the ratio of the mass of the substance to its volume.