Throw a piece of ice into a glass of water and close the glass with a tight lid. The ice will begin to melt and the water will start to cool.

Throw a piece of ice into a glass of water and close the glass with a tight lid. The ice will begin to melt and the water will start to cool. When the ice melts, the water will begin to heat up. Measure the temperature of the air and the temperature of the water in the glass several times. When will the change in the state of water in a glass end?

A change in the state of water in a glass, when the entire system passes into a state of thermal equilibrium, and the water temperature will be equal to the ambient air temperature.

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.