Yeast floats on top of wine during fermentation due to the release of carbon dioxide gas, which creates buoyancy and causes the yeast to rise to the surface.
During winemaking, the process of wine punch down involves pushing down the grape skins that float to the top of the fermentation tank. This helps extract color, flavor, and tannins from the skins, enhancing the overall quality of the wine.
Yeast rafts are clusters of yeast cells that float on the surface of the fermenting liquid during the brewing process. They help to create a protective barrier that prevents unwanted bacteria from contaminating the beer. Additionally, yeast rafts aid in the fermentation process by providing a large surface area for the yeast cells to interact with the sugars in the liquid, leading to the production of alcohol and carbon dioxide.
Ivory soap floats because air is whipped into the soap during the production process, creating tiny air bubbles that make it less dense than water. This allows it to float instead of sinking.
Some olives float while others sink is due to the amount of brine they take on during the curing process.
What causes it to sink or float is the density. The density of water is 1.0. If the object's density is more 1.0 then it sinks, but if the object's density is less then 1.0 then the object will float.
displacement
Lack of gravity.
The surface area of the raft displaces the water forcefully which causes float
A cork has a low density. It is lower then water. That causes it to float.
Density is the property that causes a ball to sink and a boat to float. If an object is denser than the liquid it is placed in, it will sink, while if the object is less dense than the liquid, it will float.
Bubbles float because they are filled with gas that is lighter than the surrounding air. This causes them to rise and float on the surface of liquids or in the air.
Eggs float in water when they are old because air enters the eggshell as it ages, making it less dense and causing it to float.