Question 2
Figure 2 shows five different spherical objects with different drag effect. Identify the sequence of drag coefficient, \( C_{D} \) for these spherical objects (from highest \( C_{D} \) to lowest \( C_{D} \) ) when the flow passed through the object at \( \operatorname{Re} \leq 1 \) and \( \operatorname{Re}>10^{4} \). Explain the reason of your sequence.
A
B
C
Figure 2
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