Heavy machine tool lubricating oil (ref. Appendix C applied fluid mechanics) is pumped through six rectangular slots in a heat exchanger (oil flows in the white rectangles in section view a-a) as shown below. You may assume that the oil flows through the heat exchanger with a constant temperature of 40°C. If the flow rate from A to B is 3 cm³/sec determine the Reynolds number for the oil flow. Is the flow laminar or turbulent

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