Q1: Euler's equation for the motion of liquids assumes that

ANS:B - fluid is homogeneous and incompressible

Euler's equation for the motion of liquids assumes that the fluid is homogeneous and incompressible. Euler's equation is a fundamental equation in fluid dynamics derived from the application of Newton's second law to fluid motion. It applies to inviscid flow, which means it neglects the effects of viscosity in the fluid. The equation is derived from the conservation of momentum and assumes that the fluid is incompressible and homogeneous. Incompressible fluid implies that the density of the fluid remains constant, while homogeneous fluid implies that the fluid properties are uniform throughout the flow field. Therefore, the correct statement is: fluid is homogeneous and incompressible.