why are water drops same in size ?

Question

even a pipe is bigger or smaller, size of water drops is same. water drops only when its exactly of that size......... whats the reason ?

Answer 1

It sounds like you're talking about water dripping (rather than flowing) out of a faucet.

Each droplet will continue to grow in size until its potential energy due to gravity equals (or rather, just barely exceeds) the total surface energy (surface "tension", as we often call it) of the spherical surface that would exist if the droplet were in free space at that instant.

Since the volume (and thus the mass, and thus the potential energy) of each spherical droplet increases as a function of its radius cubed, whereas its surface area (and thus its total surface energy) increases as a function of its radius squared, the above event is inevitable. And since gravity and the density of water are essentially constant, the critical size of each droplet is likewise.

Want bigger drip-droplets? Go to the moon, where gravity is weaker.

I hope I answered the question you were actually asking. :P

EDIT :: And by the way, the connection between my answer and the one immediately prior to mine is that the water droplet's surface energy is governed by the strength of the dipole bonds between its molecules.

Answer 2

The reason they are all the same size is that it takes a certain amount of mass for the force of gravity to break the hydrogen bonds that hold water molecules together.

Answer 3

the dimensions of a drop of organic water relies upon particularly on the diameter of the hollow. because of the fact the water collects on the opening that is going to proceed to get greater desirable until eventually its weight is larger than the exterior rigidity conserving it related to the opening. usually a drop of water is interior the order of 0.02cm3 (or 0.02g). besides the fact that the dimensions would nicely be significantly smaller yet not plenty greater desirable.

Answer 4

They are not always the same. Watch the rains man.