i think you mean how does an object float if you did here is the answer most solids float on liquid because it has air in it (sponge) or it is lighter than the liquid.
Density!!
Buoyancy Difference in density.
In general, an object floats if it is less dense (has less density) than the water (or other liquid).
To predict whether an object will sink or float in a liquid, you must first examine the densities of both the object and the liquid. If the object is more dense than the liquid, it will sink. If the object is less dense than the liquid, it will float. For example, the density of water is approximately 1g/ cm3. The density of ice is approximately 0.92 g/ cm3. That is why when water freezes, the ice floats on the top rather than sinking to the bottom.
If you can determine the volume fractions of the object that are above and below the water, then you can find the density of the object by multiplying the density of the fluid it floats in by the fraction of the volume that is below the surface of the liquid. Another, more complex way is to weigh the object alone then attach it to one arm of a balance to weigh the object when it is floating. As it floats it will displace an amount of liquid equal in weight to the total object. The decrease in weight will be proportional to the fraction of the object that is submerged. As an example: If an object weighed 100 grams out in the air but only required 20 grams to counterbalance its weight when it is floating, and the fluid it was floating in was water, then the density of the object would be (1 g/cubic centimeter)·(100-20)/100 = 0.8 g/cubic centimeter.
it means the liquid is heavier. It floats in the liquid.
An object floats when the objects density is LESS than the liquid your using.
Archimedes discovered that when an object floats in a liquid, it will displace a volume of that liquid which is equal in weight to the object.
it floats
Density!!
An object will float if it is less dense than the liquid it is placed in. An object will sink if it is more dense than the liquid it is placed in.
An object will float if it is less dense than the liquid it is placed in. An object will sink if it is more dense than the liquid it is placed in.
Place the object to be tested in the liquid you are interested in and see if it floats or not.
Buoyancy Difference in density.
Push it down, and measure the displaced liquid.
ability of an object to float or submerge depends upon the density of the object and on the density of the liquid in which it is submerged if the density of an object is greater than the density of the liquid then the object submerges in the liquid and when its density is less than the density of liquid then it floats on the liquid as in submarines when it takes water in its hollow tank its density increases and it submerges and when it pushes out water from its hollow tanks its density decreases and ot floats on water
If the volume of liquid the object displaces weighs more than the object, the object will float. The principle is buoyancy or specific gravity.