#5 The velocity of fluid particles moving in a pipe of diameter d is equal to v. If the pipe cross-section increases to diameter 2d, then the particles will have velocity _________. v/4 v/2 4v 2v

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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.