For example, we have a bottle filled with water to the point when there’s no space left in that bottle, is the water still moving as we shake the bottle?

Question

For example, we have a bottle filled with water to the point when there’s no space left in that bottle, is the water still moving as we shake the bottle?

In: Physics

Answer 1

Depends on what you consider to be movement.

The molecules that make up the water are constantly moving, that’s pretty much the definition of a fluid.

Even if you don’t shake it, the molecules still move, but if you add force, you’ll change the direction of that internal movement.

But the “shape” of the water ,for lack of a better term, will always fit the bottle. In a perfectly rigid bottle, that shape wouldn’t change.

It’s similar to the fact you’re always moving, even if you stand still, because the earth is always circling the sun.

EDIT: which means the water is moving through space at all times as well, shaken or stirred, doesn’t matter.