a two-dimensional unsteady velocity field is given by u=5x(1 t) and v=5y(-1 t), where u is the x-velocity component and v is the y-velocity component. find x(t) and y(t) if

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Aspecimen of oil having an initial volume of 580cm^3 is subjected to a pressure increase of 4.0 mpa, and the volume is found to decrease by 0.40 cm^3. (a) what is the bulk modulus of the material? (b) what is the compressibility of the material?