Reason: None provided.
Kinetic energy. At the bottom of the towers, the steel was almost four inches thick, but, as the load tapers on the way up, the thickness of the steel required also tapers. At the 79th floor, where the first plane impacted the WTC, the steel was only 1/4" thick.
THE MORE YOU KNOW.
2 years ago
2 score
Reason: Original
Kinetic energy. At the bottom of the towers, the steel was almost four inches thick, but, as the load tapers on the way up, the thickness also tapers. At the 79th floor, where the first plane impacted the WTC, the steel was only 1/4" thick.
THE MORE YOU KNOW.
2 years ago
1 score