Q1: In fluids, steady flow occurs when

ANS:B - conditions of flow do not change with time at a point

In fluids, steady flow occurs when conditions of flow do not change with time at a point. Steady flow refers to a fluid flow pattern in which the velocity, pressure, density, and other flow parameters at any given point in the flow field do not change with time. In other words, the flow remains constant and does not fluctuate over time at any specific location within the fluid. While the overall flow pattern may change over time, as in the case of unsteady flow, the conditions at any individual point within the flow field remain constant during steady flow. This means that if you were to observe a particular point in the fluid at different times, you would find that the flow parameters (such as velocity, pressure, and density) remain the same. Steady flow does not necessarily imply that the flow conditions remain the same at adjacent points or that the velocity vector remains constant at a point. It simply means that the flow parameters do not change with time at any specific point in the flow field. Therefore, steady flow occurs when conditions of flow do not change with time at a point within the fluid.