Crystal Clear Maths's video: Mathematical Surprise The Mass of Air Surrounding the Eiffel Tower

This video shares astounding material! We all know that air has mass and that when it moves (cyclones, hurricanes, tornadoes) it can do great damage. But, have you stopped to think seriously about how much mass is in a certain volume of air? I am sitting in a room that is about 8m x 4m x 3m. The temperature is about 20°C. Using the same information that I share in this video, I calculate that the air in my room weighs about 115.2 kg. That means that it weighs more than I do! If I could construct a weightless box the size of my room and pump all the air out, it could lift me off the ground! That is, it would displace 115.2 kg of air and the surrounding air, in trying to push in the fill the vacuum, would force the box (and me) upwards. This is why hot air balloons "fly" and why blimps and dirigibles were built ... and why Zeppelins like the Hindenburg and Graf Zeppelin were constructed and flown. Would you be interested in taking a few days to fly halfway around the world at low altitude (the scenic trip) instead of completing the trip in less than 24 hours at high altitude? There are companies today experimenting with reviving the days of those great airships. Let's use some very simple mathematics to calculate the mass of air that surrounds the Eiffel Tower in Paris. We construct a box and calculate its volume. A cubic metre of air at 20°C weighs about 1.20 kg. When we calculate the mass of air that surrounds the Eiffel Tower and compare it with the mass of the tower itself, the result may astonish you! I hope you enjoy the video and that it provokes you to think about the forces in nature. My thanks to MarkTheGr8 at DeviantArt for providing such a wonderful image of the Eiffel Tower. The image I used in this video was significantly cropped. You may enjoy the original (and other great images from Mark) here ~ http://markthegr8.deviantart.com/gallery/ ~~~~~~~~~~~~~~~~~~~~~~~~ Here are some YouTube videos that you may like to watch: The Graf Zeppelin arrives at Lakehurst, New Jersey, after crossing the Atlantic in about 67 hours (in 1929) ~ https://www.youtube.com/watch?v=Aaaqqn9tLeo A full documentary about the "Round the World" trip of 1929 ~ https://www.youtube.com/watch?v=d4jq7oRxw-g The Graf Zeppelin returns to Lakehurst, New Jersey, after its circumnavigation of the globe ~ https://www.youtube.com/watch?v=VG_wnJeH0fk The Graf Zeppelin over Wembley Stadium in 1930, over the Swiss Alps in 1930, flying over the Arctic Ice Cap in 1931 via Leningrad and Archangel, visiting London in 1932, visiting Miami, Florida and Chicago in 1933, and then Berlin ~ https://www.youtube.com/watch?v=oVP2pZX2yGo The crash of the Hindenburg at Lakehurst, New Jersey, in 1937 ~ https://www.youtube.com/watch?v=CgWHbpMVQ1U