BIG ENCYCLOPEDIA FOR CHILDREN AND ADULTS
Why is the Leaning Tower of Pisa falling? Detailed answer Directory / Big encyclopedia. Questions for quiz and self-education Did you know? Why is the Leaning Tower of Pisa falling? If the tower in the city of Pisa didn't even "fall", it would still be an absolute miracle. It is built entirely of white marble. The walls at the base are four meters thick. The tower has 8 floors, it reaches a height of 54,5 meters, which is equal to the height of a 15-story building. A staircase built into the wall, consisting of 300 steps, leads to the top. By the way, those who climb this staircase to the very top observe an amazing panorama of the city and the sea. The upper part of the tower deviated from the vertical by 5 meters. In other words, she "bent over." If you stand on top of the tower and throw a stone, it will fall 5 meters from the base of the tower. Why is she falling? Nobody knows the exact answer to this question. Of course, when it was built, they did not want it to "fall" at all. She was supposed to stand up straight. It was supposed to become the bell tower of the cathedral, which was located nearby. It began to be built in 1174, and construction was completed in 1350. The foundation of the tower is on the sand. Perhaps this is what caused the "fall" of the tower. But she didn't start falling right away. It started when three floors, or three galleries, had already been built. The project was slightly changed, and the building was "straightened". But it did not help. Over the past 100 years, the tower has deviated by 0,3 meters. Engineers believe that the tower is correctly called "falling" because they are sure that it will fall anyway. Author: Likum A. Random interesting fact from the Great Encyclopedia: What causes a headache? The answer to this question could be: anything! A headache can start for a hundred reasons. But this is not a disease, but a symptom. In this way, we know that something is wrong with us - in some part of the body or nervous system. Of course, we know something about the mechanism of headache formation. She herself appears due to a certain structure of the skull. It is not the very substance of the brain that is sensitive to pain, but what covers it - various veins and arteries. When they "ache", then there is a headache. Pain in the teeth, ears, muscles can affect the brain area and cause a headache. Compression of the muscles of the head can also lead to the same consequences. When people complain about a headache, you can notice that everyone names their own reason. So, some people have a headache when they are hungry, others - without a cup of coffee drunk in the morning or with a hangover. What happens in all these cases? The cranial arteries narrow or expand - this is the cause of the headache. It is known as vascular headache. With a strong shock or a sudden turn of the head, a person may complain of a headache. There is nothing special in these cases either. If a person experiences great emotional stress, then this leads to the fact that the muscles of the back, lower part of the head and neck are compressed. Result? Headache! Migraine is a special type of headache that is very different from others. But as you can see, headaches have many, many causes!
Test your knowledge! Did you know... ▪ Who built the first lighthouse? ▪ What shape was the Earth in the representation of the people of the Middle Ages? ▪ When was the mechanical differential invented? See other articles Section Big encyclopedia. Questions for quiz and self-education. Read and write useful comments on this article. Latest news of science and technology, new electronics: Machine for thinning flowers in gardens
02.05.2024 Advanced Infrared Microscope
02.05.2024 Air trap for insects
01.05.2024
Other interesting news: ▪ Antimicrobial film for household surfaces ▪ The largest silicon carbide power electronics factory ▪ Samsung 20nm mobile DRAM chips News feed of science and technology, new electronics
Interesting materials of the Free Technical Library: ▪ section of the site Medicine. Selection of articles ▪ article Synthetic fibers. History of invention and production ▪ article Why can some records be listened to endlessly? Detailed answer ▪ article Chief Announcer of Television and Radio Broadcasting. Job description
Leave your comment on this article: All languages of this page Home page | Library | Articles | Website map | Site Reviews www.diagram.com.ua |