What do you know about the size of the molecules?

The size of the molecules is very small. To find out how much, let’s imagine the following: if we lay close to each other 10,000,000 or (10^7) water molecules, we would get a thread 2 mm long.

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.