A glass of water has an ice cube floating in water. The water level just touches the rim of the glass. Will the water overflow when the ice melts?

A glass of water contains ice cubes floating on it. When all ice melts the level of water in the glass

An ice cube contains a glass ball. The cube is floating on the surface of water contained in a trough. What will happen to the water level, when the cube melts ?

When ice melts into water , the entropy -

For same mass of water and ice, why ice floats over water?