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  • File : 1318370058.png-(16 KB, 552x648, Untitled.png)
    16 KB FAGGATRON_3000 !!PEF7BVl3fW0 10/11/11(Tue)17:54 No.20519271  
    /sci/ was divided on this, which meant only 50% of people on /sci/ got it right.

    Are you smarter than /sci/?
    >> Anonymous 10/11/11(Tue)17:56 No.20519298
    pressure in the area between the gray lines is the same
    >> Anonymous 10/11/11(Tue)17:57 No.20519313
         File1318370230.jpg-(36 KB, 366x334, 1263853943928.jpg)
    36 KB
    [spoiler]the right[/spoiler]
    >> Anonymous 10/11/11(Tue)17:57 No.20519315
    the rocks are the same density, did i get it right?
    >> Anonymous 10/11/11(Tue)17:57 No.20519318
    They won't take off. No treadmill.
    >> Anonymous 10/11/11(Tue)17:57 No.20519324
    >looking for the thread on sci
    >> Anonymous 10/11/11(Tue)17:57 No.20519327
    Engineering student here, i.e. actually competent and not on sci.

    The pressure is the same.
    >> Anonymous 10/11/11(Tue)17:58 No.20519338
    No, there's only ten millimeters of water, it's not heavy enough to put enough pressure on it as the other one.
    >> Friendly Wisconsinite !Mado/3.rZc 10/11/11(Tue)17:58 No.20519344
    Why would depth matter? If you stacked a pillar of water molecules 10m high would it magically still amount to the same pressure as the one on the left? Of course not.
    >> Anonymous 10/11/11(Tue)17:58 No.20519346
    More water = more pressure
    Left one has more pressure
    >> Anonymous 10/11/11(Tue)17:59 No.20519352
    >>20519346
    Fucking this
    >> Anonymous 10/11/11(Tue)18:00 No.20519366
    >>20519327
    right bra, right...
    >> Anonymous 10/11/11(Tue)18:01 No.20519374
    Jesus fucking christ people...
    Look up Hydrostatic Paradoxon.
    It's the same!
    >> Anonymous 10/11/11(Tue)18:01 No.20519377
    Normally one would assume that the one with more water would be the one with higher pressure, but the fact that the question exists in the first place makes for the conclusion that the implied answer is the correct one, aka. "Yes, the pressure is the same".
    >> Anonymous 10/11/11(Tue)18:01 No.20519380
    Since the rocks are the same size and there are (presumably) no extra forces, it would be the same. If one person pushes a car at 1m/s or fifty people push a car at 1m/s, the car is moving at 1m/s.
    >> Anonymous 10/11/11(Tue)18:01 No.20519386
    The left one has more pressure. 50% of /g/ confirmed for never diving in a swimming pool.
    >> Anonymous 10/11/11(Tue)18:02 No.20519392
         File1318370540.jpg-(13 KB, 500x243, myth-busted.jpg)
    13 KB
    >>20519327

    >actually competent
    >the pressure is the same
    >> Anonymous 10/11/11(Tue)18:02 No.20519397
    more pressure is being exerted on the left ball
    >> Anonymous 10/11/11(Tue)18:03 No.20519404
    More importantly, how did that object get down that tube.
    >> Anonymous 10/11/11(Tue)18:03 No.20519406
    >>20519271
    eeew, someone pooped in your experiment
    >> Anonymous 10/11/11(Tue)18:03 No.20519412
         File1318370631.jpg-(59 KB, 515x388, 1317404962682.jpg)
    59 KB
    >>20519386
    >anywhere outside of basement
    >> Anonymous 10/11/11(Tue)18:04 No.20519414
    >>20519344
    Gravity, yo.
    >> Anonymous 10/11/11(Tue)18:04 No.20519424
    The math would suggest it's the same. But the math is wrong. l2 advanced fluids.
    >> Anonymous 10/11/11(Tue)18:05 No.20519437
    HOW THE FUCK DID THEY GET THAT ROCK DOWN THE TINY TUBE
    >> Anonymous 10/11/11(Tue)18:05 No.20519443
    The pressure is the same.

    google Hydrostatic Pressure at a Point
    >> Anonymous 10/11/11(Tue)18:06 No.20519448
    >>20519437
    they built the tube around the rock
    >> Anonymous 10/11/11(Tue)18:06 No.20519449
         File1318370793.gif-(9 KB, 472x198, fp2.gif)
    9 KB
    >> Anonymous 10/11/11(Tue)18:06 No.20519452
    >>>/b/
    >> Anonymous 10/11/11(Tue)18:06 No.20519455
    Seeing as the right one is deeper, the pressure is greater on the right
    >> Anonymous 10/11/11(Tue)18:07 No.20519457
    Provided that they're at the same altitude the pressure will be the same.
    >> Anonymous 10/11/11(Tue)18:07 No.20519461
    well we know for a fact that the deeper you go down in the ocean, the more pressure is exerted on you.

    so i' m going to answer the left, because more water is pressing down
    >> Anonymous 10/11/11(Tue)18:08 No.20519473
    >>20519449
    I was about to draw something like this, you saved me some time.

    THREAD OVER.
    >> Anonymous 10/11/11(Tue)18:09 No.20519498
    >>20519473
    But then again

    This
    >>20519461

    This is getting interesting
    >> Anonymous 10/11/11(Tue)18:09 No.20519499
    >>20519461
    >so i' m going to answer the left, because more water is pressing down
    Not only did you fall for it, you fell for it in the most retarded way possible.
    >> Anonymous 10/11/11(Tue)18:09 No.20519501
    >>20519473
    no problemo
    >> Anonymous 10/11/11(Tue)18:09 No.20519509
    F=ma, P=F/A
    F1=1000kg*9.81
    F2=.01kg*9.81

    1mL=1cm^3, 10mL=10cm^3, 10cm^3/1000cm means the thin one has a cross sectional area of .01cm^2

    similarly the large one is 1000cm^2 cross sectionally.

    so Plarge=(1000kg*9.81)/.1m^2
    and Psmall=(.01kg*9.81)/(0.000001m^2)

    happy?
    >> Anonymous 10/11/11(Tue)18:10 No.20519511
    >>20519449
    How can I answer OP's question without knowing the the r of the circle?
    >> NineBall !!MfGEVG3MAxb 10/11/11(Tue)18:10 No.20519518
         File1318371030.png-(29 KB, 1292x629, holy shit.png)
    29 KB
    alright guys... what about this, what if I take a fuck ton of water and FOCUS IT LIKE A MAGNIFYING GLASS ONTO THAT ROCK, FUCK YEAH!
    >> Anonymous 10/11/11(Tue)18:10 No.20519520
    pressure = force * area
    force = mass * gravity

    more mass on left -> more force -> more pressure

    (on a side note this is a similar principle to hydraulics)
    >> Anonymous 10/11/11(Tue)18:10 No.20519522
         File1318371044.png-(33 KB, 1252x648, Answer.png)
    33 KB
    You guys need to go through a basic physics course. Take a look at this illustration I made. It should aid you.
    >> Anonymous 10/11/11(Tue)18:11 No.20519528
    ITT high school physics
    >> Anonymous 10/11/11(Tue)18:11 No.20519536
    >>20519461
    If you're, say, 1km below the ocean's surface, or 1km deep in a 1m-diameter tube of water at the same altitude, the pressure will be the same. It has nothing to do with the 'amount of water pushing down on you'.
    >> Anonymous 10/11/11(Tue)18:11 No.20519539
    >>20519499
    explain it then
    >> Anonymous 10/11/11(Tue)18:13 No.20519556
    >>20519511
    ...you mean the ρ? I think we can safely assume it's the same object with the same density.
    >> Anonymous 10/11/11(Tue)18:13 No.20519560
    >>20519511
    calculate it yourself, you know the volume
    >> Anonymous 10/11/11(Tue)18:13 No.20519562
    >that feel when you remember an example from high school that said if you connected a very tiny but lengthy tube on top of a barrel and filled it with water it'd be enough to increase the pressure so much that the barrel would burst

    It was something amazing so of course I'd remember that.
    >> Anonymous 10/11/11(Tue)18:13 No.20519567
    >>20519539
    see:
    >>20519449
    >> Anonymous 10/11/11(Tue)18:13 No.20519568
    >>20519509
    fucking this.

    and for retards out there those equal the same thing.
    >> Anonymous 10/11/11(Tue)18:14 No.20519570
    look at the point, where that lower gray line is.

    the tiny bit of pressure exerted by the smaller tube, call it 1 square inch, call it 1 unit of pressure...

    that gets divided by the larger surface area of the lower larger cylinder, less pressure at the top of the lower cylinder.

    larger one on the left doesn't have that problem.
    end of discussion

    __troll line.jpg___
    >> Anonymous 10/11/11(Tue)18:15 No.20519584
    >>20519560
    ...I feel like an idiot now..
    >> Anonymous 10/11/11(Tue)18:16 No.20519588
    >>20519437
    This.
    >> Anonymous 10/11/11(Tue)18:16 No.20519589
    force = pressure * area

    The pressure would be the same, but the area of the left cylinder is larger and would exert more force on the object.

    So if we replace the rock with an empty, sealed soda can, the one in the left would be crushed while the one on the right would not be affected, but the pressures will be identical in both cases.
    >> Anonymous 10/11/11(Tue)18:17 No.20519609
    Yeah tell me it's the same pressure now, faggots
    >> Anonymous 10/11/11(Tue)18:17 No.20519618
    >>20519509
    me again.
    actually this is only valid within the tubes. once the smaller one opens into the big area at the bottom the pressure is devised and thus smaller.
    i was doing those calculations from the grey lines.
    >> Anonymous 10/11/11(Tue)18:18 No.20519622
    >>20519609
    it's the same pressure
    >> Anonymous 10/11/11(Tue)18:18 No.20519633
         File1318371518.png-(29 KB, 1080x664, what_now.png)
    29 KB
    It's not the same pressure inside the pool of water in the cave, or outside the cave at the same depth

    HURR YOU GUYS SUCK AT SCIENCE
    >> Anonymous 10/11/11(Tue)18:19 No.20519637
    >>20519622
    see >>20519618
    >> Anonymous 10/11/11(Tue)18:19 No.20519652
    >>20519637
    see
    >>20519449
    >> Anonymous 10/11/11(Tue)18:20 No.20519662
         File1318371627.png-(6 KB, 220x294, 220px-Capillarity.svg[1].png)
    6 KB
    >>20519424
    here

    When the tube is that thin, the capillary action of the tube is a significant factor affecting the pressure acting upon the rock. Stop applying simplified equations where they don't belong.

    Sure diving 10m deep in an olympic pool would feel the same as diving 10m deep in a much smaller pool. P= rho*g*h fits here. But imagine the depth of the water is 10m with only 10mL, and you're in a tank of water that's only big enough to house you.
    Do you really believe you could be crushed to death by a cup of water and a really thin straw?
    >> Anonymous 10/11/11(Tue)18:21 No.20519677
         File1318371672.png-(24 KB, 640x400, sprinkler.png)
    24 KB
    Here's another one.
    You have this S-shaped sprinkler. Water sprays out both ends, and the force of the water exiting makes it spin.
    Now, say you took this sprinkler, put it underwater, and made it suck water in instead of spray out. What would it do?
    >> NineBall !!MfGEVG3MAxb 10/11/11(Tue)18:22 No.20519692
    >>20519677
    When I start sucking water I go straight down, so so that's my guess.
    >> Anonymous 10/11/11(Tue)18:22 No.20519695
         File1318371761.png-(12 KB, 449x599, 449px-Capillarity.svg.png)
    12 KB
    you guys are all pathetic, no one got it right, Well with the correct explanation at least. Hydrostatic Pressure works but in this case, he Pressure on the left is higher, because 10 mL of Water in a 10 m Tube will certainly see some capillary action. Pic related
    >> Anonymous 10/11/11(Tue)18:23 No.20519713
         File1318371834.gif-(354 KB, 300x300, 1304060612231.gif)
    354 KB
    >swimming in the ocean
    >dive 1 feet
    >suddenly the pressure of the whole ocean is on you
    >explode
    >> Anonymous 10/11/11(Tue)18:24 No.20519721
    >>20519677
    Stand still.
    >> Anonymous 10/11/11(Tue)18:24 No.20519732
    >>20519713
    >explode
    surely, you mean implode
    >> Anonymous 10/11/11(Tue)18:26 No.20519761
    >>20519732
    now this is getting interesting.
    >> Anonymous 10/11/11(Tue)18:28 No.20519812
    This depends entirely on whether those tubes are made of glass.
    >> Anonymous 10/11/11(Tue)18:28 No.20519814
         File1318372139.jpg-(8 KB, 214x236, Tubes.jpg)
    8 KB
    TUUUUUUUUUUUUUUUUBES thread
    >> Anonymous 10/11/11(Tue)18:29 No.20519834
    >>20519814
    Beat me to it
    >> Anonymous 10/11/11(Tue)18:32 No.20519885
    >>20519677
    I would think that it would stay still
    >> Anonymous 10/11/11(Tue)18:34 No.20519910
    1 is a prime number.
    >> Anonymous 10/11/11(Tue)18:35 No.20519920
    Pressure = density*height*gravitational constant. They are exactly equal.
    >> Anonymous 10/11/11(Tue)18:36 No.20519930
    >>20519652
    in that pic it says V=hA. this is true for cubes and cylinders but it is not true for triangles and shapes like OPs pic. logical flaw detected. the A is the bottom area and the h is the hight but that h times that A gives you the volume of a cylinder with a cross section of A all the way up.

    pressure = weight/area. if theres less weight (ie smaller tube full of water) on the same area (ie the bottom of the OPs containers) then less/same compared to more/same is not equal.

    the pressure is less on the right side. >>20519449
    >>20519449
    >>20519449
    IS NOT A VALID PIC
    >> Anonymous 10/11/11(Tue)18:39 No.20519973
    >>20519930
    this.
    >> Anonymous 10/11/11(Tue)18:41 No.20519990
         File1318372863.jpg-(29 KB, 250x250, 1307575762974.jpg)
    29 KB
    >gather 10000 straws
    >put them together to make a long chain
    >fill with water
    >put it on objects
    >break everything with shit loads of pressure
    >problem science?
    >> Anonymous 10/11/11(Tue)18:41 No.20519995
         File1318372875.png-(24 KB, 1245x421, 1318372083593.png)
    24 KB
    Something clearly went wrong here.
    >> Anonymous 10/11/11(Tue)18:43 No.20520032
    >no magnets
    >no treadmills
    >no trollfaces

    wont work
    >> Anonymous 10/11/11(Tue)18:43 No.20520040
         File1318373017.png-(3 KB, 548x211, 2011.png)
    3 KB
    before gray line: pressure is the same on both
    protip: if you stack four boxes in one column produces the same pressure as if you stacked 8 boxes in two rows.

    Below the gray line: less pressure in left
    same force / more area = less pressure
    >> Anonymous 10/11/11(Tue)18:44 No.20520052
    So, according to OPs image and /g/'s theory, if I make a 1000 ft long straw and fill it with water and stick it in a pool, the pressure in the pool will be the same as 1000 ft under the ocean.
    >> ITT: HIGH SCHOOL Anonymous 10/11/11(Tue)18:44 No.20520055
         File1318373064.png-(2 KB, 800x900, hurrdurr.png)
    2 KB
    HEY /g/

    WHICH HITS THE GROUND FIRST?

    YOU SHOULD BE ABLE TO SOLVE THIS

    LOL
    >> Anonymous 10/11/11(Tue)18:45 No.20520068
    >>20520052
    Yes. Do you object to this?
    >> Anonymous 10/11/11(Tue)18:45 No.20520078
    >>20520055

    on the moon they hit at the same time so fuck you
    >> Anonymous 10/11/11(Tue)18:45 No.20520081
    >>20520055
    Air.

    /thread
    >> Anonymous 10/11/11(Tue)18:45 No.20520090
    Well, since there are more weight above the left than the right, I'd say no they don't have the same pressure, the left one has a higher pressure since there is more water pressing downwards on the stone.
    >> Anonymous 10/11/11(Tue)18:46 No.20520096
    >>20520055

    They hit the ground at the same time.
    >> Anonymous 10/11/11(Tue)18:46 No.20520113
    >>20520068
    see
    >>20519930
    >> Anonymous 10/11/11(Tue)18:47 No.20520120
    >>20520055
    If we took a teaspoon of neutron star material, and a feather, put them in a vacuum, and drop them, the neutron star material and whatever you're dropping it to would touch first

    Gravity motherfuckers
    >> Anonymous 10/11/11(Tue)18:47 No.20520126
    >>20520052
    pool needs to be closed though
    >> Anonymous 10/11/11(Tue)18:47 No.20520131
    >>20520096
    what is air resistance ?
    >> Anonymous 10/11/11(Tue)18:47 No.20520135
    >>20519522
    As soon as I saw this diagram the answer became obvious. There will be no water flow as you connect the tube, so the pressure must be the same.
    >> Anonymous 10/11/11(Tue)18:51 No.20520196
    >>20520135
    wrong, there's still gravity
    >> Anonymous 10/11/11(Tue)18:52 No.20520201
    >>20520135
    the pressure in the tubes is the same, but the pressure on the rocks is different. if you were to connect the bottoms the pressure on the right rock would increase but the water wouldnt flow because there is equal pressure in the pipes.
    >> Anonymous 10/11/11(Tue)18:54 No.20520239
    >>20520201
    this, see
    >>20520040
    do you tink those boxa are "flowing"?
    >> Anonymous 10/11/11(Tue)18:56 No.20520270
    Its good to have one of these threads on occasion, helps keep my faith in humanity down.
    >> Anonymous 10/11/11(Tue)18:57 No.20520286
    Guys, almost 99% of you got this wrong, so let me ask you a question you stupid IT nigger neckbeards who always think they are right about everything and superior to everyone else i know because my brother is one and just as dumb as you.


    If more water means more mass pushing down and more pressure, if you dip your hand in the ocean, why doesn't it implode from all the pressure? The ocean has almost all of the water on earth, ie super high pressure right?
    >> Anonymous 10/11/11(Tue)18:58 No.20520293
    >>20520052
    Yep. That's about it.
    >> Anonymous 10/11/11(Tue)18:58 No.20520296
         File1318373894.png-(22 KB, 779x421, 1318372083593.png)
    22 KB
    BRB

    PATENT OFFICE
    >> Anonymous 10/11/11(Tue)18:59 No.20520315
    >>20520296
    what
    >> Anonymous 10/11/11(Tue)19:00 No.20520326
    >>20520286
    I don't think you bothered to read the thread. Most people agree with you, and even gave very similar analogies.
    >> Anonymous 10/11/11(Tue)19:01 No.20520363
    >>20519271
    Seriously, 50% of /sci/ got this wrong?

    Well, I know I'm not going in there. You'll get better results if you ask the kids at the kindergarten.
    >> Anonymous 10/11/11(Tue)19:01 No.20520366
    >>20520326
    I read the first 25 posts.
    >> Anonymous 10/11/11(Tue)19:04 No.20520407
    Pressure is equal. Weight is not,
    >> Anonymous 10/11/11(Tue)19:12 No.20520578
    >>20520055
    I love it when high school has basically brainwashed stupid children into thinking that they will hit at the same time in real world circumstances.
    >> (ノ´_ゝ`)ノ !MoeMoe/nYc 10/11/11(Tue)19:13 No.20520595
    >>20520578
    Vacuum is a real world circumstance, no?
    >> Anonymous 10/11/11(Tue)19:14 No.20520618
    >>20520286
    Because the amount of water directly above your hand is a minuscule amount?
    >> Anonymous 10/11/11(Tue)19:15 No.20520634
    it's the same.

    I had to study hydrostatic pressure for pulmonary circulation, and I was actually surprised to learn that at the time.
    >> Anonymous 10/11/11(Tue)19:15 No.20520638
         File1318374919.gif-(998 KB, 300x300, 1318194880470.gif)
    998 KB
    >>20520595
    Maybe if you live in space
    >> Anonymous 10/11/11(Tue)19:16 No.20520656
    10m of vertical pressure, so yeah, 10m of pressure on both rocks, going to be the same right?
    i'm pretty certain the one on the left weighs more though and that's what's probably confusing folk
    >> Khoa !Fy5fuPZNcs 10/11/11(Tue)19:16 No.20520661
    >>20520055

    Crumple up feather S.T. ratio of air resistance to total weight of feather is = ratio of air resistance to total weight of 15kg weight block and both will fall at the same time.
    >> Anonymous 10/11/11(Tue)19:18 No.20520696
    >>20519920
    This is the only right answer.

    To all you fags saying their different, do your bones crush instantly from swimming 2 feet down in the ocean. Sure is a fuck ton of weight of water on you.

    Needs more magnets.
    >> Anonymous 10/11/11(Tue)19:18 No.20520702
         File1318375118.png-(113 KB, 639x521, 1318313272563.png)
    113 KB
    >>>/b/358020923/

    To be fair I expected them to be a lot dumber
    >> Anonymous 10/11/11(Tue)19:20 No.20520725
    >>20520656
    So I guess I can kill you with a cup of water and a very long straw if I wanted. I put one end of the straw on your jest, fill it up with water and BOOM - the pressure of the hole ocean is in this long-ass straw!

    Seriously, guys? You are essentially saying that the area which the pressure is applied on plays no role whatsoever. The question is clearly about the pressure on the ROCK, not between the gray lines.
    >> Anonymous 10/11/11(Tue)19:21 No.20520745
    Pretend there's a steel plate above the rock and each 10m column of water is made of iron. It will then be clear why the pressure is the same.
    >> Anonymous 10/11/11(Tue)19:23 No.20520769
    the maximum pressure on each rock is the same. however, on right side, the area of the rock that is not under the tall tube is under lower pressure.
    the rock on the left is subjected to greater overall force because force is the product of both mass and area. on the left, there is a greater area of the rock subjected to the 10 m water column.
    >> Anonymous 10/11/11(Tue)19:23 No.20520770
    >>358020923
    the weight because the leaf will flippity flop around in the air. I win
    >> Anonymous 10/11/11(Tue)19:26 No.20520814
         File1318375579.png-(25 KB, 599x596, 1318371044337.png)
    25 KB
    >>20519522
    would the water flow away?



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