If you fill the bottle with water to the top, close the neck with your finger, turn it upside down, lower it into a vessel with water and remove your finger, then the water will not pour out of the bottle. Explain this experience.
The water in the bottle will hold the pressure of the atmosphere, just as the pressure of the atmosphere will hold the mercury in the tube in Torricelli’s experiment.
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.