First slide

Surface tension

Question

Two water droplets merge with each other to form a larger droplet. In this process:

Easy

A

energy is liberated
B

energy is absorbed
C

energy is neither liberated nor absorbed
D

some mass is converted into energy

Solution

The total energy of all the small drops merged is greater than the energy of the bigger drop hence it will be given to the bigger drop as kinetic energy or heat energy which results as increase in temperature or velocity acquired by the bigger drop

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