Question

8 mercury drops coalesce to form 1 mercury drop the surface energy changes by a factor of: a)1 b)2 c)4 d)6.....​

Answer 1

Answer:

the answer is option c)4

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Answer 2

Answer:

C) 4

Explanation:

ΔU=TΔA

Use volume conservation

  8(4/3$\pi$R³) = 4/3$\pi$R'³

∴ R'=2R

  A'=4$\pi$R'²=4A

∴ΔU'=T(4A)

  ΔU=4ΔU'

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