Why do bubbles eventually sink

If the molecules of an object are very tightly packed, it has a high density. If molecules have more room to move around, the object has a lower density. Because the air trapped inside a bubble is less dense than the air outside the bubble, it’s up, up and away!

If there is pressure in your drain, when water flows down the drain, a vacuum will pull air through the P-trap, causing gurgling noises and bubbles. … Your drain is clogged. When the main vents are blocked, flushing a toilet or draining a tub can cause your sink to gurgle.

Bubbles, of course, are supposed to move up, not down, for a very basic reason: the gas that fills them is lighter than the surrounding liquid. Just like a balloon filled with lightweight helium must rise in heavier oxygen-nitrogen air, so too must the swirl of bubbles in your pint move toward the top of the glass.

The introduction of gas bubbles into a liquid might be expected to cause a relatively large floating body to sink when the average density of the fluid is less than the average density of the body. … Due to this drag, it is in fact not clear whether any amount of bubbles can cause a floating body to sink.

If you see bubbles coming from your sink’s drain, the first step you should take is to remove the sink’s drain cover or stopper. Some partial clogs cling to the stopper or drain cover, making them easy to remove. Also use a plunger to apply pressure to the sink’s drainpipes, which may force the partial clog free.