Final answer:
The statement in the question is false. In laminar flow, the velocity of the fluid varies only in the direction perpendicular to the flow.
Step-by-step explanation:
The statement in the question is false. In laminar flow, the velocity of the fluid varies only in the direction perpendicular to the flow. The flow is characterized by smooth, parallel layers of fluid moving in the same direction. In this case, the velocity of the fluid is not dependent on the position along the flat plate, so v = u(y) is not true. In kinematics, acceleration is indeed the slope of velocity vs. time graph, and vectors can certainly have components that form a right-angle triangle. Lastly, the observed frequency not becoming infinite even when the source moves at the speed of sound is a concept grounded in Doppler effect in wave phenomena.