Water at 90°C flows down a vertical pipe with no pressure drop.
Part a
Your answer is correct.
Is there the range of pipe diameters D for which the flow is definitely laminar?
No
Yes, the flow is laminar for $D \ge D_{min}$
Yes, the flow is laminar for $D \le D_{max}$
Yes, the flow is laminar for $D_{min} \le D \le D_{max}$
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Part b
Your answer is incorrect.
Find this range.
$D \le$ 1.91 mm
Attempts: 3 of 5 used
