It is to do with to volume and mass.
No, some sink.
it will float
Because some objects are a lot denser than water so the sink and others are less denser so they float
A submarine
objects with higher density than water sink, ones with a lower density float
Because of the objects density.
because some objects are much denser(heavier) than water so they sink
yes
Because of the comparative density. If the objects density is greater than water it will sink, if less then it will float.
It will float.
Because air has weight, mass, and density objects will either sink or float in it. Some balloons will float for example.
things that have holes