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Old 11-20-2008, 12:31 AM   #1
xoxoxoBruce
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November 20, 2008: Whole Lotta Hole

Just like getting a BJ from grandma... don't look down.
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Hold on to your specs while peering down here. You'd have a long climb to the bottom if they fell off.
This rocky chasm in China is one of the world's deepest underground shafts. It stretches down for an astonishing 3,100ft, or 1,026 metres.
An international team of cave explorers who discovered the cave, near the village of Tian Xing, are seen descending into the abyss.


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The picture was taken by photographer Robert Shone, 28, of Manchester, who spent two months with the climbers documenting-their explorations. Camping underground for four to five days at a time, the team were able to explore the extensive network of caves and tunnels.Though unimaginably deep, the Chinese caves are actually dwarfed by others across the globe.
The world's deepest cave is Krubera in Georgia, which is 6,822ft deep (2,080 metres), followed by Lamprechtsofen in Austria (5,354ft or 1,631 metres) and Gouffre Mirolda in France (5,335ft or 1,626 metres).


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Old 11-20-2008, 03:35 AM   #2
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Amazing. I'm gonna start a second career as a cave explorer right away.
Is this the cave where the Chinese Government dumps all the executed people? It shouldn't be that deep anymore...
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Old 11-20-2008, 04:43 AM   #3
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Should we tell Sheldon there is a giant vertical shaft in the IotD?


I just did some calculations, and if I got them right, if you tossed a stone into that shaft it would take 14.5 seconds to hit the bottom. There would be another three seconds before the sound reached you back at the top.
When it hit it would have been doing 510 kph (317mph) less wind resistance.
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Old 11-20-2008, 09:53 AM   #4
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I thought terminal velocity was around 200mph?
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Old 11-20-2008, 09:57 AM   #5
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Obviously the work of a big Horta with locomotion difficulties.
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Old 11-20-2008, 10:00 AM   #6
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It's really cool how smooth/straight that hole is. I'm no geologist. There's probably some simple explanation for how it was formed, but I can't imagine what that would be.
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Old 11-20-2008, 10:02 AM   #7
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THIS THING:
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Old 11-20-2008, 10:16 AM   #8
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I just want to throw a hot dog down there. Zen can calculate it for me. And Sheldon could laff.
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Old 11-20-2008, 10:23 AM   #9
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Originally Posted by ZenGum View Post
Should we tell Sheldon there is a giant vertical shaft in the IotD?...
I've been aware of you for some time. ;-)
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Old 11-20-2008, 10:37 AM   #10
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spelunking will NOT appear in my obituary
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Old 11-20-2008, 11:03 AM   #11
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spelunking will NOT appear in my obituary
But "Horrendous personal pleasuring device accident' will.
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Old 11-20-2008, 11:04 AM   #12
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oh, one can only hope!
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Old 11-20-2008, 11:23 AM   #13
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Quote:
Originally Posted by ZenGum View Post
Should we tell Sheldon there is a giant vertical shaft in the IotD?


I just did some calculations, and if I got them right, if you tossed a stone into that shaft it would take 14.5 seconds to hit the bottom. There would be another three seconds before the sound reached you back at the top.
When it hit it would have been doing 510 kph (317mph) less wind resistance.
I got slightly different numbers, but I didn't account for bouncing off the walls on the way down.
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Old 11-20-2008, 11:36 AM   #14
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What about terminal velocity? I guess you couldn't figure it unless you knew the exact size & mass of the stone and figured out the air resistance.
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Old 11-20-2008, 11:38 AM   #15
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All you really need is the mass, frontal area and drag coefficient.
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