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The Mariana Trench To Scale [Pic]

submitted by: Iroj
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The Mariana Trench To Scale [Pic]. It`s the deepest part of the world`s ocean and the lowest elevation of the surface of the Earth. Yeah, it`s that deep.
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Hits: 255099 | Favorites: 56 | Emailed: 89 | Rating: 3.5 | Category: Misc. | Date: 02/16/2010
 
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Inter237
Male, 18-29, Midwest US
 2449 Posts
Sunday, December 19, 2010 9:23:38 AM
Huge

Kiete5
Male, 18-29, Eastern US
 123 Posts
Thursday, September 9, 2010 11:46:34 PM
@omg-a-lion ..Thank you for reminding me about a movie that totally wasted an hour and a half of my life... I want that time back.

fhj52
Male, 50-59, Southern US
 1 Posts
Sunday, June 27, 2010 2:11:38 PM
fredg3 & BlastechDL44:
There IS confusion in the document. The Hadal zone extends from about 6096 meters(20k ft.) to the bottom, whatever that may be. The pressure at 36k feet, the bottom of Mariana Trench, is about 16kPSI. However at 20k ft. the pressure is approximately 9k PSI.
BlastechDL44, you forgot to multiply by the 14.7 PSI.
E.g., 20k/33 = 606.0606; 606.0606 *14.7 =~ 8909.0909 =>~ 8909 PSI at 20k ft.
...or roughly 9k PSI.
That's a guesstimation method.
The more proper method, using formula that gives the P pressure on an object submerged in a fluid( P = ρ * g * h ) and adding atmospheric pressure on the surface yields ~ 8896 PSI at 20k ft.
* ρ (rho) is the density of the fluid, (density of sea water = ~1025 kg/m3 )
* g is the acceleration of gravity (9.8 m/s2)
* h is the height of the fluid above the object

The author of this pic got confused, most likely, because the wiki document referen

fredg3
Male, 18-29, Eastern US
 1 Posts
Tuesday, February 23, 2010 12:15:02 PM
No, BlastechDL44, YOU'RE WRONG. The illustration does NOT claim that 20,000 ft = 1,100+ atmospheres. The relationship is between pounds per square inch at the surface of the earth and at the depth of 20,000 feet. That is, it`s between 16,000 psi and 14.7 psi. (14.7 psi being the pressure from the atmosphere at sea level.)

So you can wipe that smug look off your face now.


BlastechDL44
Male, 40-49, Canada
 1 Posts
Monday, February 22, 2010 10:10:34 AM
I'm surprised there are five pages of comments and no one has caught the fact that this striking image contains bogus numbers.

The pressure of seawater increases at a rate of about 1 atmosphere per 32 feet (33 feet in fresh water), give or take.

The claim made in this image is that 20,000 ft = 1,100+ atmospheres. That is incorrect. 625 would be more accurate.

The pressure at the bottom of the challenger deep is over a thousand atmospheres, according to the wikipedia, and basic arithmetic.

So, its a nice illustration, but factually incorrect.


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