Final answer:
The minimum thickness of concrete over soil does not match the provided reference information regarding the flow of concrete. The provided information can be used to calculate the Reynolds number and verify if the concrete's flow is laminar by using the concrete's density, viscosity, hose dimensions, and flow rate.
Step-by-step explanation:
The minimum thickness of concrete over normal undisturbed soil does not correspond to the given reference information about the flow rate of concrete. However, I will answer the reference question. To verify if the flow of concrete is laminar, one can calculate the Reynolds number using the formula Re = (ρvd)/η, where ρ is the density of the concrete (2300 kg/m³), v is the velocity of the concrete, d is the diameter of the hose (0.08 m), and η is the viscosity of the concrete (48.0 (N/m²) s).
First, to find the velocity (v), one must use the flow rate (Q): v = Q/A, where Q is the flow rate (200 L/min or 0.2 m³/min) and A is the cross-sectional area of the hose (π * (d/2)²). After calculating the velocity, one can insert the values into the Reynolds number formula to determine if the flow is laminar (Re < 2000). If the calculated Re is less than 2000, then the flow is laminar.