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/sci/ - Science & Math

File: 204 KB, 786x427, goce_gravity_field_786map.gif [View same] [iqdb] [saucenao] [google]

Anonymous Mon Jun 28 15:55:14 2010 No.1289131 [Reply] [Original]

Fuck yeah, gravity map!

>>	Anonymous Mon Jun 28 15:56:14 2010 No.1289139 I guess this explains why Europe is superior.

>>	Anonymous Mon Jun 28 15:57:14 2010 No.1289142 OP's mom lives in Iceland.

>>	Anonymous Mon Jun 28 15:57:14 2010 No.1289145 >>1289142 Subtle. Real subtle.

>>	Colonel Coffee Mug !phJ7yIcs.Q Mon Jun 28 15:58:14 2010 No.1289150 File: 29 KB, 364x358, 1276808358924.jpg [View same] [iqdb] [saucenao] [google] >My face when I'm in a country with normal gravity unlike the Phillippines.

>>	Anonymous Mon Jun 28 15:58:14 2010 No.1289151 >>1289139 all those fat people in europe are increasing the gravity there

>>	Anonymous Mon Jun 28 15:59:14 2010 No.1289156 That's why people in Indonesia are shorter. The gravity pulls them down.

>>	Anonymous Mon Jun 28 15:59:14 2010 No.1289159 >>1289131 9.9/10 Looks like you've got everybody except me and one other person

>>	Anonymous Mon Jun 28 16:00:14 2010 No.1289165 why does india have such low gravity? is it that it's really far beneath sea level?

>>	Anonymous Mon Jun 28 16:01:14 2010 No.1289168 I see a fish south of Africa.

>>	Colonel Coffee Mug !phJ7yIcs.Q Mon Jun 28 16:02:14 2010 No.1289175 >>1289168 Very clever.

>>	Anonymous Mon Jun 28 16:02:14 2010 No.1289172 >>1289159 >>1289159 http://news.bbc.co.uk/1/hi/sci/tech/8767763.stm wut

>>	Anonymous Mon Jun 28 16:03:14 2010 No.1289179 File: 4 KB, 158x162, yeahright.jpg [View same] [iqdb] [saucenao] [google] >>1289172 >bbc

>>	Anonymous Mon Jun 28 16:03:14 2010 No.1289185 >>1289179 bbc >>>> american shit

>>	Anonymous Mon Jun 28 16:04:14 2010 No.1289190 >>1289179 yea, bbc is famous for rendering their own gravity maps and pretending it was goce.

>>	Anonymous Mon Jun 28 16:05:14 2010 No.1289195 File: 27 KB, 172x172, 1277108117602.jpg [View same] [iqdb] [saucenao] [google] >>1289190 >>1289185 >bbc

>>	Anonymous Mon Jun 28 16:05:14 2010 No.1289196 File: 43 KB, 511x577, face65.jpg [View same] [iqdb] [saucenao] [google] Why are they measuring gravity in meters?

>>	Anonymous Mon Jun 28 16:05:14 2010 No.1289200 >>1289196 I measure time in kilograms.

>>	Anonymous Mon Jun 28 16:06:14 2010 No.1289205 File: 36 KB, 221x246, 1277108577350.jpg [View same] [iqdb] [saucenao] [google] >>1289196 >because its bbc

>>	Anonymous Mon Jun 28 16:06:14 2010 No.1289210 >>1289196 read this: http://news.bbc.co.uk/1/hi/sci/tech/8767763.stm it explains. inb4 further >bbc

>>	Anonymous Mon Jun 28 16:06:14 2010 No.1289206 >>1289185 Which is why BBC is running Star Trek. /cough

>>	Anonymous Mon Jun 28 16:07:14 2010 No.1289218 File: 35 KB, 256x256, 1277107634910.jpg [View same] [iqdb] [saucenao] [google] >>1289210 >bbc

>>	Anonymous Mon Jun 28 16:07:14 2010 No.1289221 What's with the >bbc ? I dun geddit

>>	Anonymous Mon Jun 28 16:08:14 2010 No.1289229 File: 21 KB, 421x512, 1277108292345.jpg [View same] [iqdb] [saucenao] [google] >>1289221 >bbc a legit source >my face

>>	Anonymous Mon Jun 28 16:10:14 2010 No.1289241 Protip: Orange areas have lower gravity.

>>	Anonymous Mon Jun 28 16:10:14 2010 No.1289242 >>1289229 Oh, i get it. So is the video courtesy of ESA that is embedded in the article not reliable either?

>>	Anonymous Mon Jun 28 16:12:14 2010 No.1289264 So surely people in the red will be slightly stronger and the blue weaker. Maldives, right in that blue area, and yet everyone there is short a bit stocky.

>>	Anonymous Mon Jun 28 16:12:14 2010 No.1289268 >>1289210 I couldn't find it. Mind explaining it?

>>	Anonymous Mon Jun 28 16:15:14 2010 No.1289282 >>1289131 Wow, India must really be getting it bad.

>>	Anonymous Mon Jun 28 16:15:14 2010 No.1289287 you didn't read the article, no one can be that stupid.

>>	Anonymous Mon Jun 28 16:16:14 2010 No.1289294 File: 8 KB, 293x280, myface3.jpg [View same] [iqdb] [saucenao] [google] >bbc >at all biased or unreliable

>>	Anonymous Mon Jun 28 16:17:14 2010 No.1289302 Question: Why would the bbc lie about this? Are they famous for it? Not trolling/baiting just an Amerifag who doesn't know much about bbc.

>>	Anonymous Mon Jun 28 16:20:14 2010 No.1289336 File: 36 KB, 576x324, 1276402388782.jpg [View same] [iqdb] [saucenao] [google] >>1289302 >bbc >measure gravity in meters

Anonymous Mon Jun 28 16:20:14 2010 No.1289329

>>1289302
basically the BBC is pretty truthful on the serious issues, it by law has to be as unbiased as possible because it is paid for by taxes. Trolls have been implying for ages that BBC is biased because unless they make it seem that way BBC is really hard to dispute

>>	Anonymous Mon Jun 28 16:20:14 2010 No.1289331 There isn't a way to measure gravity like this. There isn't a valid way to create a gravity topographical map like this. Get out of my /sci/.

>>	Anonymous Mon Jun 28 16:21:14 2010 No.1289339 >>1289331 >implying a whole heap of bullshit

>>	Anonymous Mon Jun 28 16:22:14 2010 No.1289349 >>1289336 The figure is from the ESA actually, and the reason it is measured in metres is actually quite obvious. ITT: butthurt americans jealous of bbc

>>	Anonymous Mon Jun 28 16:22:14 2010 No.1289353 File: 18 KB, 401x273, freeman.jpg [View same] [iqdb] [saucenao] [google] >>1289329 doesn't stop them from being complete retards >Gravity >meters

>>	Anonymous Mon Jun 28 16:23:14 2010 No.1289358 >>1289331 And you know better than the collective brains of Goce and the ESA? Read the article.

>>	Anonymous Mon Jun 28 16:23:14 2010 No.1289363 File: 3 KB, 124x107, pete carroll.jpg [View same] [iqdb] [saucenao] [google] >>1289349 >Gravity >measured in meters nice troll bro

>>	Anonymous Mon Jun 28 16:24:14 2010 No.1289364 >>1289331 Holy shit, what am I reading. http://apod.nasa.gov/apod/ap011113.html is nasa not reliable either?

>>	Anonymous Mon Jun 28 16:24:14 2010 No.1289366 >>1289150 >implying the Philippines is New Guinea

>>	Anonymous Mon Jun 28 16:25:14 2010 No.1289373 >>1289353 >>1289363 Quit spaming.

>>	Anonymous Mon Jun 28 16:25:14 2010 No.1289375 >>1289364 >Nasa doesn't measure gravity in meters imokwiththis.jpg

>>	Anonymous Mon Jun 28 16:27:14 2010 No.1289384 ITT: science fans who didnt read the article

>>	Anonymous Mon Jun 28 16:27:14 2010 No.1289385 >>1289375 lol you dumb. their map is also in metres.

Anonymous Mon Jun 28 16:27:14 2010 No.1289387

>>1289331
Geophysicist here. You're fucking retarded. We do this every day for hydrocarbon, ore and geothermal exploration. Not to mention for archeology and forensics. GTFO NAO!

http://en.wikipedia.org/wiki/Gravimetry
http://ocw.mit.edu/courses/earth-atmospheric-and-planetary-sciences/12-201-essentials-of-geophysics-
fall-2004/lecture-notes/ch2.pdf

Anonymous Mon Jun 28 16:27:14 2010 No.1289389

>>1289358
>>1289339
>Launched in 2009, the sleek satellite flies pole to pole at an altitude of just 254.9km - the lowest orbit of any research satellite in operation today.

>1 part in 10,000,000,000,000 of the gravity experienced on Earth.

>Implying that measuring a paper clip on an analytical balance in a moving car is easy, or even possible to do accurately.

>>	Anonymous Mon Jun 28 16:27:14 2010 No.1289390 >>1289364 At least Nasa doesn't measure it in meters

>>	Anonymous Mon Jun 28 16:28:14 2010 No.1289395 ffs I bet /b/ could respond more sanely that you lot. In fact, fuck it... >>>245408400

>>	Anonymous Mon Jun 28 16:28:14 2010 No.1289392 SEEING AS IT'S BILLY MAYS DAY I WILL PROCEED IN ALL CAPS THE MAP IS NOT MEASURING GRAVITY HURR DURR. IT IS MEASURING HEIGHT, HENCE WHY IT IS IN METRES.

>>	Anonymous Mon Jun 28 16:29:14 2010 No.1289407 >>1289389 Implying that measuring a paper clip on an analytical balance in a moving car is easy, or even possible to do accurately. >Implying that is a reasonable analogy

>>	Anonymous Mon Jun 28 16:30:14 2010 No.1289411 I meant >>>/b/245408400

>>	Anonymous Mon Jun 28 16:30:14 2010 No.1289413 File: 23 KB, 267x400, The Sea of Trolls.jpg [View same] [iqdb] [saucenao] [google] ITT

>>	OP Mon Jun 28 16:33:14 2010 No.1289433 >IT IS MEASURING HEIGHT, HENCE WHY IT IS IN METRES. NO MR MAYS, YOU ARE WRONG. IT EXTRAPOLATES TO METERS RELATIVE TO THE IDEAL. Seriously, wtf have I started here?

>>	Anonymous Mon Jun 28 16:33:14 2010 No.1289437 >>1289407 Well as opposed to a platinum block measured more accurately in a moving spacecraft. Low orbits have drag do air.

>>	Anonymous Mon Jun 28 16:33:14 2010 No.1289441 /sci/ - Trolling and Religion

>>	Anonymous Mon Jun 28 16:35:14 2010 No.1289460 >Low orbits have drag do air. wat?

>>	Anonymous Mon Jun 28 16:45:14 2010 No.1289555 File: 21 KB, 451x388, sophisticatedmonkey.jpg [View same] [iqdb] [saucenao] [google] >>1289437 >Low orbits have drag do air.

Anonymous Mon Jun 28 16:46:14 2010 No.1289563
File: 11 KB, 600x355, gravitysurvey.gif [View same] [iqdb] [saucenao] [google]

Resident geophysicist here:

Gravity surveys are measured in "gals" named after Galileo.

<span class="math"> m a = F = \frac{G m M}{r^2} [/spoiler]
<span class="math"> a = \frac{F}{m} = \frac{G M}{r^2} [/spoiler]

a = [N]/[m]

It is a Gravity Field, that's why it has the same units as an Electric Field.

The reason OP's map is in meters is because you can display the same information as the deviation in height at a specific point of a datum ellipsoid (whose radii are defined) of mean density to achieve the measured gravitational acceleration at said point.

It's basically a different way of saying the same thing, but it assumes a standard ellipsoid and a mean density therefore it is a simplification. For the purposes, though, it's perfectly fine.

>>	Anonymous Mon Jun 28 16:50:14 2010 No.1289608 File: 36 KB, 500x447, Iseejpg.jpg [View same] [iqdb] [saucenao] [google] >>1289555 >sophisticatedmonkey.jpg

>>	Anonymous Mon Jun 28 17:25:14 2010 No.1289930 >>1289563 Why cant people like you post sooner?

>>	Anonymous Mon Jun 28 17:35:14 2010 No.1290020 >>1289131 well that explains why Indian gurus can levitate

>>	Josef @home !!cvJKiVKmWz2 Mon Jun 28 17:37:14 2010 No.1290037 >>1289563 It is a Gravity Field, that's why it has the same units as an Electric Field. The fuck

>>	Anonymous Mon Jun 28 17:59:14 2010 No.1290271 >a = [N]/[m] in normal physics [a] = N/kg geophysics seems confused

>>	Anonymous Mon Jun 28 18:01:48 2010 No.1290293 >>1290271 Geophysicist here: yep you're correct, it's mass at the bottom, in kg a = [N]/[kg] = [gal]

>>	Anonymous Mon Jun 28 18:02:14 2010 No.1290308 >>1290271 Geophysicist here: yep you're correct, it's mass at the bottom, in kg a = [N]/[kg]

>>	Anonymous Mon Jun 28 18:19:14 2010 No.1290392 File: 103 KB, 245x154, freefall.png [View same] [iqdb] [saucenao] [google] a challenger appears

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