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Latest users (3): princessren, subtard, sweetbutteryjesus, anonymous(4).
What do you think? Give us your opinion. Anonymous comments allowed.
#1065 - mr skeltal (03/10/2014) [-]
#1066 to #1065 - magthebrownranger (03/10/2014) [-]
I beg to differ
#1067 to #1066 - mr skeltal (03/10/2014) [-]
User avatar #1063 - gayobliteratorhere (03/10/2014) [-]
That entire Cosmos episode and series is still only universal

for I am beyond that
User avatar #1056 - xedeid (03/09/2014) [-]
I'm currently having an "argument" With my Chem II teacher. if one or a few of you could solve this problem, it would help clear it up. It's a boiling point elevation question. How many to grams of FeO is added to 1568g of water to make the boiling point of the solution 104.6 C? The Kb of water is 5.2
#1055 - pacs (03/09/2014) [-]
just watched the debate between nye and ham. do you know anyone who knows anyone who changed their opinion based on it ?

btw still evolutionist
User avatar #1057 to #1055 - kanadetenshi (03/09/2014) [-]
Nope, but that's mainly because i barely know any creationists.

Also evolutionist isn't a word, you don't call people who accept gravity gravitationists right?
User avatar #1061 to #1057 - fargthree (03/09/2014) [-]
You can believe it's right, but not believing it's right doesn't make it any less right.
User avatar #1059 to #1058 - kanadetenshi (03/09/2014) [-]
There's the problem right there, you don't believe in evolution no more than you believe in gravity or the chair you're in, you understand them and accept their validity. The term evolutionism is merely a buzzword by denialists as an attempt to establish evolution and it's proponents as religious or cultish.
User avatar #1060 to #1059 - sonnyboii (03/09/2014) [-]
Whatever floats your boat m8
User avatar #1054 - larrynonymous (03/09/2014) [-]
Could someone explain alkenes to me I didn't explain all the carbon bonds stuff.
#1070 to #1054 - caocao (03/10/2014) [-]
With an alkane the formula is CnHn+2. With an Alkene it is CnHn. This is due to there being a double bond between 2 C-atoms in the formula of an alkene. An alkane has only singular bonds while an alkene has at least one double bond.
A C-atom always needs 4 bonds , that is why these double bonds form, or so I've been told by my chemistry teacher.
This double bond is also important for cis-trans isomerism.
User avatar #1072 to #1070 - larrynonymous (03/11/2014) [-]
thank you.
User avatar #1064 to #1054 - connorjay (03/10/2014) [-]
I haven't studied chem for a good few years, and haven't looked at alkenes for longer than that but I thought alkenes had a double bond between 2 carbons, so have fewer hydrogens around.
User avatar #1046 - kanadetenshi (03/08/2014) [-]
Anyone excited for le black science man's new cosmos series that will premiere tomorrow? I'm pretty damn excited and i hope the series will have that spark that Sagan's version had. I also hope they remake the evolution sketch to fit with modern data.
User avatar #1050 to #1046 - nigeltheoutlaw ONLINE (03/08/2014) [-]
Very excited. Don't have cable, but I'll get it online somehow.
User avatar #1051 to #1050 - kanadetenshi (03/08/2014) [-]
I'll try to give you a link to the episode as soon as i find one.
User avatar #1052 to #1051 - nigeltheoutlaw ONLINE (03/08/2014) [-]
That'd be awesome.
User avatar #1047 to #1046 - doneofsteel (03/08/2014) [-]
TOMORROW!?!?!? I need to watch that.

When tomorrow, what channels will it be on? Anything special?
User avatar #1048 to #1047 - kanadetenshi (03/08/2014) [-]
I'll be airing on Fox channels and Nat Geo, according to a friend it'll air on 3 AM in central european time so i'm probably going to wait for a torrent or someone to post it on youtube.
User avatar #1044 - xedeid (03/08/2014) [-]
I'm currently having an "argument" With my Chem II teacher. if one or a few of you could solve this problem, it would help clear it up. It's a boiling point elevation question. How many to grams of FeO is added to 1568g of water to make the boiling point of the solution 104.6 C. The Kb of water is 5.2
#1039 - mr skeltal (03/08/2014) [-]
SO im 21 and don't excersice and am taking these testosterone boosters whats supposed to happen?
User avatar #1043 to #1039 - awesomerninjathing ONLINE (03/08/2014) [-]
YOU'RE NOT SUPPOSED TO ACTUALLY DO THE 5 TIPS RON JEREMY GIVES YOU
User avatar #1038 - commanderbunbun (03/08/2014) [-]
this is the only place i have to turn to for this:

my sister is going to induce labor tomorrow. i can't get the thought of something bad happening to her or the baby out of my head. what could go wrong and what are the chances of it happening?
User avatar #1041 to #1038 - awesomerninjathing ONLINE (03/08/2014) [-]
about 100%
#1028 - minibeep (03/07/2014) [-]
what is he standing on ?
do boats have penises ?
imgur.com/pdfAkwY
User avatar #1042 to #1028 - awesomerninjathing ONLINE (03/08/2014) [-]
the bow
User avatar #1081 to #1042 - asleepyplatypus (03/12/2014) [-]
i think that is actually part of the ballast
User avatar #1025 - doneofsteel (03/07/2014) [-]
I am currently trying to imagine the fourth dimension and from what I've heard, it's a temporal dimension and not a spatial dimensoin.

So, I'm curious now. Some guy on YouTube called Rob Bryanton described it like we see ourselves like a 'spime' or a 'long undulating snake'. So, I understand that if I saw from the point of view of the fourth dimension I would simply see a finite but very high number of 'me's all the way from the grave to my mothers womb?

Does this mean that the universe is a complete and still structure, that time is simply the experience of traversing forward in the fourth dimension and things becoming more chaotic?

I'm not sure if this sounds like ramble, but yeah.
User avatar #1053 to #1025 - larrynonymous (03/09/2014) [-]
I have this weird thought now and again and this was before I knew what 4D was.
I thought there was this place that recorded every second. so like if I walked somewhere there would be me in a line a second behind and in front. It is hard to explain. Like a save data but a save for each foot step and you could compile it and see each version of you in that time.
User avatar #1068 to #1053 - doneofsteel (03/10/2014) [-]
I understand
User avatar #1032 to #1025 - whatley (03/07/2014) [-]
In string theory the fourth dimension is time, in geometry and some areas of mathematics you can have higher dimensional objects where the 4th, 5th, 6th ect dimensions are considered as spatial, which is where we get thing's like tesseracts from.
User avatar #1083 to #1032 - doneofsteel (03/13/2014) [-]
**doneofsteel pokes whatley**
User avatar #1036 to #1032 - doneofsteel (03/07/2014) [-]
Do you know more about string theory?
User avatar #1084 to #1036 - whatley (03/13/2014) [-]
Oh, sorry, didn't notice this.

Not really to be honest, it's an area I'm interested in but haven't really gotten around to learning because I can't understand the maths behind it, and that's how I like to learn things.
User avatar #1085 to #1084 - doneofsteel (03/13/2014) [-]
No problem.

You.. like learning? Well, I guess there's that breed too.
User avatar #1086 to #1085 - whatley (03/13/2014) [-]
I like to learn interesting things like physics. I'm currently doing a qualification in economics too and it's hell, so I don't like learning all things.
User avatar #1088 to #1086 - doneofsteel (03/13/2014) [-]
Well, good luck with your economics anyway...
User avatar #1087 to #1086 - doneofsteel (03/13/2014) [-]
Wow.. I do everything because I have to... Hah.
It's a big world after all.. Lots of different people..
#1033 to #1032 - mr skeltal (03/07/2014) [-]
tesseracts from what ive seen are represented quite feasibly in 3 dimensions. what about them are 4-dimensonal?

--gary
#1034 to #1033 - whatley (03/07/2014) [-]
Because you can't view them properly. The way geometric dimensions work is that the number of lower dimensional objects you need are multiples of two.

You start with a point, that's zero dimensional.
Two points make a line, one dimension.
Four lines make a square, two dimensional.
Six squares make a cube, three dimensional.
Eight cubes make a tesseract, four dimensional.

The image is an analogue of a four dimensional object in three dimensional space.
User avatar #1152 to #1034 - goobyman (03/18/2014) [-]
don't forget that as with a shadow with a cube, the angles aren't correct. in a 2 square, all angles 90degrees. 3d cube: all angles 90 degrees. so for the 4d tesseract: all angles of all lines 90 degrees.
User avatar #1154 to #1152 - whatley (03/18/2014) [-]
Yeah, it's really hard to conceptualize. The fact that it's actually 8 cubes all at 90 degree angles to each other seems impossible.
User avatar #1026 to #1025 - haroldsaxon ONLINE (03/07/2014) [-]
Time is the fourth dimension
User avatar #1029 to #1026 - doneofsteel (03/07/2014) [-]
I'm just wondering if anyone could add on to a more specific description of what 'time' is.
User avatar #1027 to #1026 - doneofsteel (03/07/2014) [-]
Well yes, I kinda already said that
User avatar #1030 to #1027 - haroldsaxon ONLINE (03/07/2014) [-]
I don't see how that would be complicated. It's simply that.
User avatar #1031 to #1030 - doneofsteel (03/07/2014) [-]
I'm pretty sure that it's more to it than that, could be wrong though.

I just want the big physicist to come in.
#1023 - mr skeltal (03/07/2014) [-]
what is this called (not sure if this is the right place too post but thanks for any help)
User avatar #1153 to #1023 - goobyman (03/18/2014) [-]
pentagonal dodecahedron
User avatar #1040 to #1023 - viktordiaz (03/08/2014) [-]
looks like a dodecahedron. can't really count the number of faces
User avatar #1069 to #1040 - xsnowshark (03/10/2014) [-]
Nah, you got it right
#1022 - pacs (03/07/2014) [-]
how can i stay awake for another 4 hours
User avatar #1024 to #1022 - subtard ONLINE (03/07/2014) [-]
Studies show that prolonged instances of not sleeping are correlated with being awake.
#1020 - mr skeltal (03/07/2014) [-]
Does anyone here have any experience of knowledge of what to expect with kidney donation, either receiving or giving?
User avatar #1007 - revengeforfreeze (03/06/2014) [-]
So, any geologists?

I'm curious. Sedimentary rocks is formed when a bunch of stuff like.. how do I say it.. powder or whatever is brought to the bottom of the ocean, by waterstreams right?
User avatar #1015 to #1007 - copyhat (03/06/2014) [-]
Yeah, sediment is heavy particles that sink to the bottom of the stream (sea, ocean, lake or whatever) but can also be airborne.

en.wikipedia.org/wiki/Sediment
User avatar #1016 to #1015 - revengeforfreeze (03/06/2014) [-]
Great, thanks.

Just had a test in this and I wanted to make sure that I was right
User avatar #1008 to #1007 - revengeforfreeze (03/06/2014) [-]
I mean, particles.

From the other kind of rocks.
User avatar #999 - alexanderburns ONLINE (03/06/2014) [-]
there is no religious proof that science exists
User avatar #1018 to #999 - markowuzhere (03/07/2014) [-]
theres no proof that you exist.
bananaman:1
athreists:0
User avatar #1012 to #999 - goobyman (03/06/2014) [-]
0/10
User avatar #1006 to #999 - djequalizee (03/06/2014) [-]
If we've never touched a star how can we be sure they're hot
User avatar #1017 to #1006 - rainbowrush ONLINE (03/07/2014) [-]
I'm hot
User avatar #1001 to #999 - soundofwinter (03/06/2014) [-]
funny guy
User avatar #994 - xsnowshark (03/06/2014) [-]
I think I'm gonna do what martycamp did and see if anyone has any aerospace questions. I'm also a third year student and can probably answer your questions about planes and rockets ... and rocket planes (they exist), as well as other stuff of the like. I really like talking about this stuff so feel free to ask anything.
User avatar #1092 to #994 - moolfle (03/13/2014) [-]
What is a rocket plane?
User avatar #1100 to #1092 - xsnowshark (03/14/2014) [-]
The best example of a rocket plane would have to be the North American X-15 (one of my favorite planes). A rocket plane is simply a plane that is powered by a liquid fuel rocket engine. The reason that such a plane was made was so that we could achieve hypersonic flight (~mach 5+).

Another way to go hypersonic speeds would be to use a SCRAMjet engine, but they work on supersonic combustion. This is very tricky, which is why there is no way of getting up to that speed with an air-breathing engine (that we know of). The best analogy I have heard was that supersonic combustion is like trying to keep a match lit in a hurricane.

Because of this issue, engineers built a plane around the most powerful, non-air-breathing engines that they could think of, a rocket engine.

Here's a link to the X-15, it's really interesting:
en.wikipedia.org/wiki/North_American_X-15
User avatar #1102 to #1100 - moolfle (03/14/2014) [-]
Okay, I don't know much (anything) about engines and what not, what's the difference between a liquid rocket fuel engine and an air breathing? Also, how much energy and fuel does it take to get to those speeds/what's the point in it?
User avatar #1113 to #1102 - xsnowshark (03/15/2014) [-]
As far as rocket engines go, there are solid and liquid fuels that you can use to produce thrust. Solid rockets are also called SRB's and are very simple. You basically put a bunch of stabilized fuel in a container with a convergent/divergent nozzle at the bottom and let them rip.

Liquid fuel engines are more complex. The use two different cryogenic fuels, such as RP-1, liquid hydrogen, etc, and pair it with an oxidizer such as liquid oxygen. In the case of the space shuttles engines, they burned a combination of liquid hydrogen and liquid oxygen (the exhaust, for the most part, is just water!) because in space you need something to oxidize the fuel (no air in space).

Air breathing would be like a turbojet engine, something that takes in air, compresses it, mixes it with fuel, and then combusts it to create thrust. So in this case, you are taking in air (your oxidizer) from the atmosphere instead of liquid oxygen from a storage container.

It takes a large amount of fuel to get something moving that fast though. The reason that you would want to go that fast is mainly for research. The X-15 was a treasure trove of data that we use even now. Everything from heat resistant materials to hypersonic flight controls.

I'll try to get some better numbers on the fuel consumption/energy requirements for you, though.
User avatar #1114 to #1113 - moolfle (03/15/2014) [-]
Thanks, this may sound really dumb but how exactly does the thrust engines, or any engines for that matter but mainly thrust ones, on planes allow them to fly?
#1123 to #1114 - xsnowshark (03/15/2014) [-]
Thrust is just a name for the force that is produced by a rocket or jet/propeller engine. It allows a plane to fly by accelerating the plane forward, thereby pushing air over the planes wings. The wings allow a plane to fly by creating a difference in pressure from the bottom (high pressure) to the top (low pressure). This is what creates the lift that allows a plane to take off from the ground. The faster a plane travels (i.e. more thrust = faster speeds) the faster the air flows over the wing which allows it to go higher and higher (because a larger lift force is being generated).

You can actually see the difference in pressure when looking at something called wingtip vortices (pic attached). Those vortex's are formed from the high pressure spilling over the tip of the wing to the top low pressure side. They are essentially mini tornadoes.
#1124 to #1123 - xsnowshark (03/15/2014) [-]
That's why planes have these things on the wing tips. They are called winglets, and the reduce the size of the vortexes, which reduces the drag the vortexes can create.

This means that you need less thrust to fly, and your plane is more efficient.

The yellow winglet in the background is a newer design, its a scimitar winglet.
User avatar #988 - maracasguy (03/06/2014) [-]
I have a chemistry test in 5 hours. Could one of you give a short summary of the most important Things about a few subjects? I don't want a lot more than the basics.

What I feel I don't know as well as I should is:
Lipids
Triglyserids
Peptide bond
Steroid structure
Enzyms
Photosynthesis during the day vs during the night
User avatar #1013 to #988 - goobyman (03/06/2014) [-]
dangit also too late.
just google it xD sorry mate
User avatar #1011 to #988 - kanadetenshi (03/06/2014) [-]
Sorry i wasn't online when you posted this, i was too late dammit.
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