Cleaning the world's tallest building

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Picture of Natan_el_Tigre52 achievements

+5 1. Natan_el_Tigre commented 7 years ago

Can a resident math nerd calculate for us an approximate length of time a "dropped something" (a coin, perhaps) would fall from the top of this building before hitting the ground AFTER reaching terminal velocity?

http://en.wikipedia.org/wiki/Terminal_velocity
Picture of cameramaster55 achievements

+1 2. cameramaster commented 7 years ago

There is NO WAY you would EVER get me doing that ( shudders )...hell if that was me I'd have shit meself by now !
Picture of ZaMpTi47 achievements

+14 3. ZaMpTi commented 7 years ago

Well, I would have to puke all the time, but at least I could clean the mess instantly :x
Picture of Gondy1048 achievements

+6 4. Gondy10 commented 7 years ago

I'm passing there everyday going to work.. Guys, I suggest you come visit Dubai, the city is so amazing..
You'll see this twisted building too: http://www.constructionweekonline.com/pictures/CG%20Pix/Infinity_1.gif
Picture of mosfet2333 achievements

+5 5. mosfet23 commented 7 years ago

828 Meters high = 13 seconds for an object to hit the ground
http://www.gravitycalc.com/
Picture of Niek36 achievements

+4 6. Niek (admin) commented 7 years ago

@4 I visited the city last December and it's absolutely amazing, both Downtown and Marina. I have to say I'm a bit surprised that for a high-tech building like the Burj Khalifa they don't have an automated window cleaning system.
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+2 7. bella1 commented 7 years ago

Coins are flat, so they experience a lot of air resistance, and they are light, so it doesn't take much drag to counteract their weight. Thus, if hurled off a skyscraper, coins achieve their terminal velocity after only about 50 feet (15 meters) of descent. After that point, they flutter to the ground at a measly 25 mph (40 kph), Bloomfield said.

If there were no air, a falling coin would accelerate to a speed of 208 mph (335 kph) by the time it reached the ground (or your head). At that speed, it might very well damage your skull, but it wouldn't drill through.
Picture of loadrunner54 achievements

+3 8. loadrunner commented 7 years ago

I wonder if we can build that high once, the top wil in snow all year long.
Picture of Tarc37 achievements

+1 9. Tarc commented 7 years ago

What if these buildings had like a rail running down on each edge, with some arm extending out somewhat that runs top to bottom, spraying a huge amount of hot water from a pipe with an incredibly high pressure so that it reaches the middle of a side (between two edges).

The hot air falling down would just evaporate and not reach ground. Is it a stupid idea? Like fire trucks have + high pressure cleaner systems + lifts combined. No need for paying men continuously.
Or if this isn't doable, surely there could be a technological solution in this day and age. Or if this "running down at the edge" idea would only work on non-complex geometrical shapes, still if it does 50% of the job, still efficient.
Picture of zongap34 achievements

+4 10. zongap commented 7 years ago

#6 in those areas workforce is very cheap. At least it's cheaper than an automated system.
And you know how it works in our modern (capitalist) world : I don't care how it must be done, but I'll do it the cheapest way !

Wikipedia ==> "A study conducted in 2004 found the median salary range of Indian migrants to be between Dh 1,001—1,500 (between US$ 270—408) per month (or US$ 3,240—4,896 per year), considerably below the national per capita income of US$ 55,200"
Picture of MakeTnotWar38 achievements

0 11. MakeTnotWar commented 7 years ago

1:06 The choice of music is brilliant! It's from Hitchcock's movie "Vertigo".
Picture of herial27 achievements

-1 12. herial commented 7 years ago

#5 so you could make a call to warn them that shit is raining! XD
Picture of Lasering34 achievements

0 13. Lasering commented 7 years ago

3:4 his point it not true. At least there is one machine that is capable of cleaning high rise building's windows.
http://www.ipceagle.com/products/highrise