1. For the velocity field given by V = 6xi − 2yzj + 3k, determine where the flow field is incompressible. 2. Consider the following velocity field (in Cartesian coordinates): u = xt + 2y, v = xt2 − yt, w = 0. Is this flow incompressible? 3. Is the flow field compressible or incompressible?

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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.