Two equal drops of water are falling through air with. steady velo | Filo
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Class 11

Physics

Mechanics

Mechanical Properties of Fluids

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Two equal drops of water are falling through air with. steady velocity v. If the drops coalesced, what will be the new velocity ?

Solution:
When the two equal drops coalesces, volume of water remains same and a bigger drop is formed. Lets say is radius of drop before these combine and is radius after these combine. 
We have
and we know that terminal velocity radius, so we have
 

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