Question

why some material float or sink on the surface of water​

Answer 1

Answer:

This is because the buoyant force acting on the object is less than the weight of the object. If the density of the object is less than or equal to the density of the liquid, then it floats on the surface of the liquid. This is because the buoyant force acting on the object is equal to the weight of the object.

Answer 2

Answer:

due to their densities.

one having low density will float.

one having high will sink obviously...