Why in water, the density is greater than the water sink, and the density is less than the water float on the surface? What's the reason? It's the reason! Who answered well? 30 points will be added!

Suppose that an object is immersed in water, then f floats = ρ water GV discharges g matter = mg = ρ matter GV matter. Because of immersion, V discharges = V matter, when ρ water > ρ matter, f floats > G matter, the object will float up and eventually float. When ρ water = ρ matter, f floats = g matter, the object will float. When ρ water < ρ matter, f floats < g matter, the object will sink and finally sink to the bottom

Mix vegetable oil with water and shake with force. You will find that vegetable oil turns into small droplets and disperses in water. This kind of solution is called ()

This is emulsion
You're not asking the right question... It should be said that the liquid is called
We can't call this solution
Because solution and emulsion are opposite

Put a piece of wood into the water, and the wood floats on the water, which shows that the density of wood is smaller than that of water. Why?
Please explain the details clearly

The essence of buoyancy is equal to the volume of water discharged by the object, the same volume of object and water. The density of wood is smaller than that of water, and the mass corresponding to the volume of wood immersed in water is less than buoyancy. Then the wood floats up
This is also the principle that objects with higher density than water will sink

Why in water, the density is greater than the water sink, and the density is less than the water float on the surface? What's the reason? It's the reason! Who answered well? 30 points will be added!