Density and shape.
It is easy enough to make a boat out of iron. We all know that Iron is heavier than water, but by shaping it we can make the shape so that its volume inside could hold more weight of water than its own weight. That way, it will float.
If a materials density is less than the density of water, then it will float no matter what.
Density
i think buoyancy
Sinking or floating are determined by the density of the object.
The density of the object and the density of the liquid. The object must be less dense than the liquid to float.
An object will float if it has less density than the density of the liquid.An object will float if it has less density than the density of the liquid.An object will float if it has less density than the density of the liquid.An object will float if it has less density than the density of the liquid.
If the density of an object is lower than water then it will float, if the density is higher it will sink.
Shape and density
The weight does not determine if an object will float in water. If an object has a DENSITY that is more than the density of water then it will sink, if it's density is less than the density of water it will float.
If the density of the object is less than the density of the water it is placed in, the object will float and vice versa.
If it is lower it will float
Density
The density of the object (mass/volume) compared to the density of the liquid.