What is the reason that the hot water bag will float in the cold water basin
Archimedes's law is an important principle, it is pointed out that hydrostatic, immersed in static fluid objects by a buoyancy, its size is equal to the weight of the fluid displaced by the object, vertical direction and through the centroid of the displaced fluid. This conclusion was first proposed by Archimedes, which is called the principle of Archimedes. It is also true that the object is partially immersed in the liquid. The same conclusion can be extended to gas.
Empty hot water bags do not release water will float in the cold water basin - plastic (small proportion, small density) than water2 hot water is lighter than cold waterBased on the above two points no matter whether there is no hot water bags in the air will go up
The reason for the hot water bottle floating is less than cold water. The first reason is that the proportion of the hot water in the hot water bag is less than that of the cold water, and the two is the proportion of the hot water bag and the air inside the bag is less than that of the cold water. Elements of Archimedes's definition.
