The energy needed for breaking a drop of...

The energy needed for breaking a drop of radius R into n drops each of radius r is

`(4pir^(2)-4piR^(2))T`

`(4piR^(2)-4pir^(2))T`

`[4/3pir^(3)-4/3piR^(3)]T`

`(4pir^(2)-n4pir^(2))//T`

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