Why modern ships, the mass of which can reach several tens of thousands of tons, do not sink in water?

There are many empty spaces inside the ship. This leads to the fact that the average density of the ship is much less than the density of water. In this case, the force of gravity acting on the ship is equal in magnitude to the Archimedean force.

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.