Fluid MechanicsMedium
Question
Two drops of equal radius are falling through air with a steady velocity of 5cm/sec. If the two drops coalesce , then its terminal velocity will be : -
Options
A.
× 5 cm/s
× 5 cm/sB.cm/s
cm/sC.
× 4 cm/s
× 4 cm/sD.
× 5 cm/s
× 5 cm/sSolution
Radius of big drop
R = (n)1/3r = (2)1/3r
vT
= (2)2/3 = 41/3
v′T = 41/3 5cm/s
R = (n)1/3r = (2)1/3r
vT
= (2)2/3 = 41/3v′T = 41/3 5cm/s
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