In a glass of water, an ice float, in which there is a steel ball. Will the water level in the glass change when the piece of ice melts?

The water level will increase because the steel ball will sink in the water and displace a volume of liquid equal to its volume (before that, it floated in an ice floe on the surface of the water).

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.