﻿ Eight drop of water, each of radius r, coalesce to form a single big drop. The energy released is used up in raising the temperature of the big drop. If is the surface tension of water and  its density and J the mechanical equivalent of heat (all expressed in SI units), the rise in the temperature of the drop is  : Kaysons Education

# Eight Drop Of Water, Each Of Radius r, Coalesce To Form A Single Big Drop. The Energy Released Is Used Up In Raising The Temperature Of The Big Drop. If is The Surface Tension Of Water And  its Density And J The Mechanical Equivalent Of Heat (all Expressed In SI Units), The Rise In The Temperature Of The Drop Is

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## Question

### Solution

Correct option is

The energy released in the process is  joules, since R = 2r. Therefore, heat energy produced is

If  is the rise in temperature, then we have

.

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