True-False
Extracted text: 1) In a conical pipe, despite a steady (permenant) flow can be producible, uniform flow cannot be. 2) The flow through a cylindrical pipe with a circular cross-section must always be a uniform flow. 3) The main difference between rigid body mechanics and fluid mechanics is that the term of convective acceleration does not exist in rigid body mechanics. 4) The temporal average of the velocity components perpendicular to the pipe wall in turbulent flow in a circular pipe is zero. 5) It is easier to examine the change of flow characteristics at a point in a flow domain with time compared that of to examine the pathline of a fluid particle over time.