Showing posts with label Things We've Built. Show all posts
Showing posts with label Things We've Built. Show all posts

NORAD, National Geographic

Spy Fortress
43 min 6 sec - May 12, 2007

It is one of the largest underground Military Command Centers in the world. Responsible for protecting the skies over North America. Capabale of monitoring enemy missiles from around the globe.

Foucault's pendulum

COSI Science Center. The pendulum at COSI is a visitor favorite. It demonstrates that the Earth rotates at 790 mph! Science shows that as the Earth moves, it carries COSI with it, and COSI carries the pendulum, giving the illusion that the pendulum is moving in a circle.



Last year when scientists mounted a pendulum above the South Pole and watched it swing, they were replicating a celebrated demonstration performed in Paris in 1851. Using a steel wire 220 feet long, the French scientist Jean-Bernard-Léon Foucault suspended a 62-pound iron ball from the dome of the Panthéon and set it in motion, rocking back and forth. To mark its progress he attached a stylus to the ball and placed a ring of damp sand on the floor below.
The audience watched in awe as the pendulum inexplicably appeared to rotate, leaving a slightly different trace with each swing. Actually it was the floor of the Panthéon that was slowly moving, and Foucault had shown, more convincingly than ever, that the earth revolves on its axis. At the latitude of Paris, the pendulum's path would complete a full clockwise rotation every 30 hours; on the Southern Hemisphere it would rotate counterclockwise, and on the Equator it wouldn't revolve at all. At the South Pole, as the modern-day scientists confirmed, the period of rotation is 24 hours.
The swing of Foucault's pendulum depends on the way we set it into the motion. If we set the pendulum in motion by a short push at the position of equilibrium it will swing as it is shown in animation. Actually the speed of the pendulum in the extreme positions is the speed of the earth rotation in the point of observation.

De slinger van Foucault in het Panthéon te Paris

Burj al Arab Hotel in Dubai

Burj Al Arab -World's only seven star hotel located in the hub of business in the middle east--Dubai

1929 Home Construction

This is 16mm home movie from 1929 of the construction of a large estate home. 16MM film was introduced in the 1920's as a home movie medium. Since 35mm film was printed on nitrate filmstock that could easily combust, a smaller gague (16MM) was created that was printed on saftey stock made of acetate that was safe for home use. The cost of a 16MM camera at this time cost more than a car. Thus this is a common example of a 16MM upper class home movie project.



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Implosions

The Landmark Tower (AKA Continental National Bank Building) was built between 1952 -1957 and stood 380-foot tall or 30-stories. At the time of this implosion (18 March 2006) the Landmark Tower was the second tallest building ever imploded in the world.

Three Rivers Stadium on the banks of the Ohio River in Pennsylvania on the 11th February



Baldwin Hills Dam Disaster

On December 14th 1963 in the hills about Los Angeles, the Baldwin Hills Reservoir suddenly cracked and eventually failed flooding the neighborhood below. Several people died and many homes were destroyed.
YouTube - Baldwin Hills Dam Disaster and Flood: ""

The Great Pyramids of Giza, Cairo, Egypt

5 milleniums... hard to understand and a true testimony of ingenuity...



Great Wall, China

One of the most marvelous human acheivements



Badaling Pass


Qin Terra-Cotta Warriors at Xian, China

The Terracotta Army was buried with the first Emperor of Qin (Qin Shi Huangdi) in 210-209 BC (his reign over Qin was from 247 BC to 221 BC and over unified China from 221 BC to his death).