alleryBall radius 1 mm, viscosity 1 Pa s, density excess 900 kg/m3, g = 10 m/s2. Terminal speed?
A2 mm/s
B0.2 mm/s
C20 mm/s
D4.5 mm/s
Answer & Solution
Correct answer: A. 2 mm/s
Using v = (2/9)(900)(10)(0.001 squared)/1 gives 0.002 m/s, which is 2 mm/s.
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