Why are liquids and gases heated from below?
| May 28, 2020 | Education
When heated, liquids and gases expand, their density decreases. So the warmed up mass becomes lighter than the surrounding one, not warmed up, and rises up, giving off heat to colder areas. This is how heat exchange occurs. If you heat the top layer, it will remain hot at the top and will not go down.
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.