Question

. Calculate the energy released when 1000 small
water drops each of same radius 10 m coalesce to
form one large drop. The surface tension of water is
7.0 x 10-2 N m-1.
​

Answer 1

Explanation:

Solution :

Let r be the radius drops and

of bigger one. Equanting the initial and final volume, we have <br>

<br> or,

<br> or,

<br> Further, the water drops have only one free surface. Therefore, <br>

<br>

<br>

<br> Here, negative sign implies that surface area is decreasing. Hence, energy released in the process.

<br>

Answer 2

Explanation:

I hope you got your answer. Final answer is7. 9*10^-12J.