Question

two equal drops are falling through air with a steady velocity of 5 cm if drops coalesce the new terminal velocity will be​

Answer 1

Answer:

when the two equal drops coalesces, volume of water remains same and a bigger drop is formed. Lets say r is radius of drop before these combine and R is radius after these combine. we have

2×

3

4

πr

3

=

3

4

πR

3

⇒R=2

1/3

r

and we know that terminal velocity V

T

∝ radius

2

, so we have

V

T

V

T

′

=

r

2

R

2

⇒V

T

′

=(

r

R

)

2

V

T

=(2

1/3

)

2

×5cms

−1

=5×4

3

1

cms

−1

Explanation:

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