Answer:
1. Italy
The Leaning Tower of Pisa is in the city of Pisa, in Tuscany, a region in west-central Italy. More specifically, the tower is on the grounds of the city's cathedral complex, which is known as the Campo dei Miracoli or Piazza dei Miracoli, the “Square of Miracles.”
2. August 9, 1173
While there has been much controversy over the real identity of the architect who constructed the tower, it is Giovanni di Simone whose name is majorly attributed for designing this human marvel! The construction began with full force on 9th August 1173 and continued until 1178.
3. 1360
By the time it was completed in 1360, modern-day engineers say it was a miracle it didn't fall down completely. Though the cathedral itself and the adjoining baptistery also leaned slightly, it was the Torre Pendente di Pisa, or Leaning Tower of Pisa, that became the city's most famous tourist attraction
4. It became apparent that the Leaning Tower of Pisa was leaning in the late 1170s, after completion of the first three of the tower's planned eight stories. The leaning was caused by the uneven settling of the building's foundations in the soft ground.
5. Cables were installed to help prevent leaning. 50 cubic yards of soil were removed from the high side of the tower (1990). (Engineers said it would be stable for 300 years) More dirt (77 tons of soil) were removed (2008) to stabilize the movement.
6. April 10, 1912, 12 p.m. - The RMS Titanic sets sail from Southampton, England, on its maiden voyage, with approximately 2,220 passengers and crew. April 10, 1912, 6:30 p.m. - Arrival in Cherbourg, France. April 10, 1912, 8:10 p.m. - Leaves Cherbourg. April 11, 1912, 11:30 a.m. - Arrival in Queenstown, Ireland.
7. Why did the Titanic sink? The immediate cause of RMS Titanic's demise was a collision with an iceberg that caused the ocean liner to sink on April 14–15, 1912. While the ship could reportedly stay afloat if as many as 4 of its 16 compartments were breached, the impact had affected at least 5 compartments.
8. 1,500 people
9. April 14, 1912
10. After the Titanic, ships started being redesigned for better safety. The ship's bulkheads were made higher so water could not get in and bottoms were stretched to create double hulls. These changes all contributed to better, safer, and more reliable sea travel.
11. Washington
The Tacoma Narrows Bridge was built in Washington during the 1930s and opened to traffic on July 1, 1940. It spanned the Puget Sound from Gig Harbor to Tacoma, which is 40 miles south of Seattle
12. Slender, elegant and graceful, the Tacoma Narrows Bridge stretched like a steel ribbon across Puget Sound in 1940. The third longest suspension span in the world opened on July 1st.
13. The first Tacoma Narrows Bridge opened to traffic on July 1, 1940. Its main span collapsed into the Tacoma Narrows four months later on November 7, 1940, at 11:00 a.m. (Pacific time) as a result of aeroelastic flutter caused by a 42 mph (68 km/h) wind. The bridge collapse had lasting effects on science and engineering.
14. The Tacoma Narrows Bridge collapsed primarily due to the aeroelastic flutter. In ordinary bridge design, the wind is allowed to pass through the structure by incorporating trusses. In contrast, in the case of the Tacoma Narrows Bridge, it was forced to move above and below the structure, leading to flow separation.
15. "Blind Spot"-- Design Lessons of Gertie's Failure. At the time the 1940 Narrows Bridge failed, the small community of suspension bridge engineers believed that lighter and narrower bridges were theoretically and functionally sound.
Step-by-step explanation:
Here you go