The Mariana Trench To Scale [Pic]

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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 = Ï g * h ) and adding atmospheric pressure on the surface yields ~ 8896 PSI at 20k ft. * Ï (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.

GuardinGnome Male, 18-29, Eastern US 1237 Posts	Sunday, February 21, 2010 9:03:59 AM Holy s**t. It's stuff like this that really makes you think.

omg-a-lion Male, 13-17, Australia 115 Posts	Thursday, February 18, 2010 11:49:03 PM @Skirjames Like clover field?

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