Why does a coin sink and a boat float?

An object will sink if it has greater density than water (or whatever liquid it is place in); it will float if it has less density than the liquid.

An object will sink if it has greater density than water (or whatever liquid it is place in); it will float if it has less density than the liquid.

An object will sink if it has greater density than water (or whatever liquid it is place in); it will float if it has less density than the liquid.

An object will sink if it has greater density than water (or whatever liquid it is place in); it will float if it has less density than the liquid.