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#2897 - scrotoloitch (09/11/2014) [-]
What's the philosophy of math?
User avatar #2911 to #2897 - leightonsolomon (09/14/2014) [-]
All math is is patterns and ways to describe things. I don't know if it has a philosophy, but the purpose of math is to create a language to explain the world. Thats why math and science go hand in hand.
User avatar #2902 to #2897 - Mortuus (09/12/2014) [-]
Proofs or it didn't happen
User avatar #2890 - ishallsmiteyou (09/10/2014) [-]
Anyone who doesn't know their periodic table is a bismuth technetium carbon hydrogen.
User avatar #2899 to #2890 - crampers (09/11/2014) [-]
you might have corrected it, but you still failed you Bitcch
User avatar #2901 to #2899 - ishallsmiteyou (09/12/2014) [-]
I know, I'm barium sulfur iodine carbon.
User avatar #2891 to #2890 - ishallsmiteyou (09/10/2014) [-]
*technetium hydrogen
#2887 - meebobear (09/09/2014) [-]
Find the domain . also the fuck is this shit around the "2x+1" in math?
i never liked math , never did good at math guess its my time to shine as my teacher gave this question to the class in the last 10 minutes with a prize of full mark for the whole class.
no one answered . so he made it a homework with a prize of 2 marks for who solved it.

Find the domain . the question ends somewhere when we find the domain which usually goes like " f =R : f =/= something" for example.

HelpMePls D:
#2888 to #2887 - frikandelspeciaal (09/09/2014) [-]
Y=F(x) means that the value Y is a function of value X

This means that the value of Y will vary depending on what the value of X is. The formula you've given shows the relationship between X and Y
This relationship will often be displayed using a graph (pic related).

When people ask for the domain of a function they are basically asking : "Is there a Y-value for every possible X-value?"

When the answer is "yes" the domain is R, meaning that for every possible x-value there is a Y-value.

However, in your example the anwers is "no".
Whenever there is a X in the denominator of a fraction it will be possible that there is a X-value that will cause the denominator to add up to zero.

As you might know, dividing something by zero is impossible, meaning that the funtion Y won't exist for the X-value that causes the denominator to be equal to zero.

To be continued...
User avatar #2889 to #2888 - frikandelspeciaal (09/09/2014) [-]

So to find the domain we have to ask ourself: "for what X-value will (2x+1)(-5) equal 0?"


x= -0,5

So if you fill in -0,5 into the formula you will find that the denominator will equal 0, meaning that F(X) does not exist for X= -0,5

So the domain is:
X=R: X=/= -0,5

I hope this explanation makes sense, if you have any more questions i will do my best to help you
User avatar #2892 to #2889 - meebobear (09/10/2014) [-]
the answer seemed so logical tbh.. showed it to my teacher at the end of the class . he said it was wrong and i was like "oh okay . went back to my seat" .. didnt even ask him why ._.
ill make sure to get the right answer tomorrow
thanks for your reply tho. really appreciated.
#2893 to #2892 - frikandelspeciaal (09/10/2014) [-]
Is that the way your teacher gave you the formula? Because i might have interpreted it wrong.

Does the denominator say: (2x+1) times -5
Or does it say: (2x+1) minus 5

i'm not sure why he put so many brackets there

Also, did he tell you what the right answer way? I'm really curious as to why i fucked up
User avatar #2894 to #2893 - meebobear (09/10/2014) [-]
he did it exactly as the first one . we asked him the fuck's the brackets. he just looked at us and said the prize of the question :/
also he didn't say a thing about the right answer. so i suppose he'll still give marks for the right question :3 ill ask him the first thing tomorrow.
#2895 to #2894 - frikandelspeciaal (09/10/2014) [-]
So i'm thinking that the brackets are just there to throw people off.
This would mean that the formula can be rewritten as show in the image

2x+1-5 = 0
2x-4 = 0
2x = 4
x = 4/2
x = 2

So the domain is:
X=R: X=/= 2

I hope this the correct answer this time.
#2896 to #2895 - meebobear (09/10/2014) [-]
if that makes any difference. the answer usually starts with "3x+1-5 (bigger or greater than) 0"
pic is an example of question + answer on paper "المجال = domain"
excuse the cam/light and my shitty hand-writing . i was writing fast which adds to the fact that i still have shitty hand-writing ..
User avatar #2900 to #2896 - frikandelspeciaal (09/11/2014) [-]
There are several cases in which a function cannot exist for a certain X-value.

The first one i mentioned is when the denominator of a function becomes 0.

Another situation is the square root of a negative number.
When a square root is involved, you will know the function will exist as long as the contents of that square root is greater or equal to zero.

So in your example the domain goes from -5/3 to infinity, because as long as X is greater than -5/3 the funtion will exist.
#2882 - theluppijackal has deleted their comment [-]
#2881 - imtryingmybest (09/08/2014) [-]
was polio cured or was it weak enough for the vaccine to stop it? shouldnt we atleast be close to the cure for the flu and common cold by now? in reality do pharmicuticals want to make cures for atleast the bigger things or make money off treatments? does scaraway really work? do the cosmetics with plant stem cell work? why am i asking all these questions?
User avatar #2883 to #2881 - blaaz (09/08/2014) [-]
because your curious.
#2884 to #2883 - imtryingmybest (09/08/2014) [-]
what about all the other questions
User avatar #2885 to #2884 - blaaz (09/08/2014) [-]
Well for those i personally think that i don't know enough about the subjects to give a accurate response to them. I apologize for that.

I do happen to know a little bit about the "cold/Flu" one though (anyone feel free to correct me if im wrong)" From what i understand about the cold/flu is that they often mutate in a sense that they swap genetic information between other versions of the "cold/flu" which would mean that each mutated version is technically a completely different disease yet still function in a similar matter.

( cures for diseases to my knowledge work like keys do to locks. If the "teeth" inside the lock are changed then the key/cure wont work for that modified lock)
User avatar #2886 to #2885 - blaaz (09/08/2014) [-]
of course i could be wrong. (but that's a given)
User avatar #2880 - ishallsmiteyou (09/07/2014) [-]
I want to eat a Pb sandwich but I think I'll die if I do.
User avatar #2874 - cognosceteipsum (09/05/2014) [-]
I have a theory. The high pitch whine that some mammals make when they're afraid (not threatened, read, afraid) is made to comfort them
User avatar #2879 to #2874 - drl (09/06/2014) [-]
i have a theory that my cock will harden after you post nudes
User avatar #2875 to #2874 - newvein (09/06/2014) [-]
Maybe they're calling for help, or trying to scare the spooky thing away or something
User avatar #2869 - Marker ONLINE (09/05/2014) [-]
anyone know of a good site to graph vectors by inputting magnitude and angle?
User avatar #2870 to #2869 - whatley (09/05/2014) [-]

Based Wolfram does everything.
User avatar #2871 to #2870 - Marker ONLINE (09/05/2014) [-]
I ended up overthinking the problem and was able to do it by hand
But you are right anyway.....
User avatar #2872 to #2871 - whatley (09/05/2014) [-]
Well that's good anyway.

If I'm honest Wolfram Alpha is probably the worst thing you could introduce to anyone studying maths/physics, shit is literally cheating and you know you'll end up getting lazy and just typing questions into it.
User avatar #2873 to #2872 - Marker ONLINE (09/05/2014) [-]
it's more than useful as a quick tool to get part of a problem solved that you'd need a graphing calculator for, provided you don't have one handy.
User avatar #2866 - assdoreponyfucker (09/03/2014) [-]
sciencexplain ! What's so significant about a mole? (chemistry)
User avatar #2867 to #2866 - subtard (09/04/2014) [-]
1 mole times 1 amu = 1 gram
A molecule of water is about 18 amu. 18 grams of water has 1 mole of molecules in it.
Just a way to convert efficiently from micro to macro scale
User avatar #2865 - youdontknoeme (09/03/2014) [-]
What are the steps to developing a scientific theory? What procedures do the theories go through before they're deemed trustworthy and reliable and universally accepted.
User avatar #2868 to #2865 - coronus (09/04/2014) [-]
A good theory is based on experimental evidence or mathematical proofs, and critically analyses the available evidence in such a way as to provide an explanation for how it fits together or what its cause was.

This starts as a hypothesis, with the expectation and responsibility to gather novel evidence through rigorous scientific methods, in order for hypothesis to become theory.
As a theory, it will only become accepted when a substantial amount of supporting evidence is gathered, little good disproving evidence exists, supporting results can be consistently replicated, and opposing or alternative theories are either less concise or garner less compelling evidence.
User avatar #2862 - inspiteofsprite (09/03/2014) [-]
I heard that paper can only be recycled up to 7 times, which startled me a bit. Once the paper can no longer be recycled, what happens to it?
User avatar #2864 to #2862 - youdontknoeme (09/03/2014) [-]
I guess it become extremely low quality and deemed unusable at that point. would then get binned or disposed of in a more appropriate manner.
#2861 - imtryingmybest (09/02/2014) [-]
do you think pharmaceuricals would want the cure for the flu and common cold or would they want to keep making money from flu shots and over the counter medicine
User avatar #2858 - dumbassvtwo (09/02/2014) [-]
Red hot nickel ball Vs Liquid Nitrogen

RHNB-Liquid Nitrogen (Ft. NurdRage)
User avatar #2857 - dumbassvtwo (09/02/2014) [-]
RHNB-World's Largest Gummy Bear
User avatar #2851 - eight (09/01/2014) [-]
I was thinking about spacecrafts and was wondering how plausible they were with access to endless amounts of cash.

Think of a flat ship, or perhaps a cone shaped ship for less wind resistance, about the size of a small city, probably around 15-20 million square feet. It would be massive, but instead of having a few powerful engines it would be propelled by thousands of smaller engines, doesn't really matter what kind of fuel.

Would it be capable, if propelled by so many engines, to take off from the ground and escape earths gravity?
User avatar #2903 to #2851 - Mortuus (09/12/2014) [-]
Just build it in orbit.
#2863 to #2851 - dehumanizer (09/03/2014) [-]
Execept you would need the power of 6 milion burning jews to even levitate that thing a meter of the ground. Oy vey.
User avatar #2876 to #2863 - aherorising (09/06/2014) [-]
6 million jews stroking their hands in evil laughter would probably give more energy
#2877 to #2876 - dehumanizer (09/06/2014) [-]
Just think of all the power beeing beeing turned into heat from their hand rubbing, i bet they dont even have power plants in israel.
User avatar #2859 to #2851 - djequalizee (09/02/2014) [-]
Maybe. it'd make a lot more sense just to build it in space, though. If there was something with that much thrust it might fuck up everything around it when it takes off as well.
User avatar #2852 to #2851 - aherorising (09/01/2014) [-]
ehhh, that's a bit too vague for a solid answer. But you should consider the fact that having a few powerful engines is just as good, if not better, than thousands of smaller engines. you'd have to think about how much thrust can be generated.

But I think it's unrealistic, because it'd likely break, or become very unstable due to wind currents. Metals can be strong, sure. But a ship that size would not remain rigid, and sounds very hard to control. I think a ball-shaped design would be better.
User avatar #2853 to #2852 - eight (09/01/2014) [-]
This is true. Unless we came up with a much stronger material, I don't think there is anything that could be built to such a scale without instability and breaks.
User avatar #2854 to #2853 - aherorising (09/01/2014) [-]
what might be doable, however, is if we were to construct it in space. instead of having one massive thing launch all at once, just launch multiple smaller parts, and assemble the full thing in space or orbit.
User avatar #2855 to #2854 - eight (09/01/2014) [-]
Good idea. It could be used as a means for transport between planets. It would take so much longer to build that way though.
User avatar #2848 - geothermal ONLINE (08/31/2014) [-]
If you put a solar panel in a mirrored box connected to a lightbulb, and gave it some starting power, how long do you think it could last?

What if:
Flawless Mirrors
100% Efficient light-bulb/solar panel
Some kind of power transmission that works on the mirrors surface
User avatar #2860 to #2848 - djequalizee (09/02/2014) [-]
If you're talking hypothetically that it wouldn't lose any energy then it could technically last forever. Although that would essentially be the same thing as a perpetual motion machine, and that's not really possible unless you figure out a way around the laws of thermodynamics.
#2856 to #2848 - mislavcro (09/01/2014) [-]
With flawless mirrors and 100% efficent solar panel and light bulb, it could last a pretty darn long time. Only thing that would use the energy would be the resistance of the wires.
User avatar #2846 - mondamini (08/30/2014) [-]
So I'm going to be applying to university pretty soon, and I'm thinking of either doing some form of engineering or astrophysics.

Though I'm not sure about astrophysics, as its only really the new forms of transport that interest me like Warp drives and the EMDrive. Negative energy ain't too boring either.

The problem is, I don't know what the chances are of being able to study/research an area like this. The last thing I want is to go through 5 years of uni to get a job unrelated to space or to be stuck monitoring gamma ray bursts or space debris.

So is going for engineering a safer choice or should I take the risk of doing astrophysics?
User avatar #2912 to #2846 - leightonsolomon (09/14/2014) [-]
I was thinking about studying astrophysics as well, but its true its not necessarily a stable field. Keep in mind, engineering is the number one career field right now. I hear people say to do what you love a lot, but being a an engineer would definitely benefit you. Maybe find a bridge between the two. An engineer for NASA or some other space related corporation would probably have the best of both worlds.
User avatar #2914 to #2912 - mondamini (09/15/2014) [-]
Being an engineer at NASA really was the dream scenario, but when I live in Scotland its not realistic. Anyway I went to some uni open days and am now sure I'm going to take up some form of engineering (don't know which), but thanks for the advice.
User avatar #2847 to #2846 - dumerveil (08/30/2014) [-]
I'm sure there's someone at your university that could help you with this.
#2840 - dehumanizer (08/30/2014) [-]
User avatar #2849 to #2840 - feelythefeel (08/31/2014) [-]
Yes. Science, which is by definition is the study of the universe, is actually just all in our imaginations. In fact, let's just start from the beginning and see if we can come up with some less sexist and privileged science. If we hurry, we can rediscover fire before we starve to death!
User avatar #2878 to #2849 - cognosceteipsum (09/06/2014) [-]
It really is all in our head, dude. Science is a human way of measuring things - not the objective objects outside of our mind.
User avatar #2841 to #2840 - schnizel (08/30/2014) [-]
top lel
#2842 to #2841 - dehumanizer (08/30/2014) [-]
The jews are now trying to shut down science as well.
User avatar #2843 to #2842 - schnizel (08/30/2014) [-]
holy kek
#2844 to #2843 - dehumanizer (08/30/2014) [-]
Its true, first they destroyed religion, then they destroyed social norms and now they are going to destroy science soon. Its gonna be happening.
User avatar #2845 to #2844 - schnizel (08/30/2014) [-]
It's happening!
#2829 - nimba (08/28/2014) [-]
has anybody tried to make a "closed" ecosystem? I'm thinking about trying to make a small one and want to include bugs and general critters in it to spice it up. I think I might do ants and a small spider?
User avatar #2836 to #2829 - coronus (08/29/2014) [-]
If you're going to do ants and a spider, and you want it to last a while, you've got two options.

A: capture one of the flying ants, a few big ants from the same population (breeding workers), and some of the tiny foraging ants. The winged ants at the end of the summer are females who are looking to establish a colony due to their queen's recent death.

B: find the eggs, and dig them up along with he tiny ants near them. these are the youngest ants in the colony, who have recently hatched and are in charge of the nursery. With these, you could get lucky with gender ratios and produce a new queen to start a breeding colony.

In either case, you'll need to drop in some food for them to start with, and possibly a bit of sugar water near the corner you settle them in, so the ants can focus on reconstruction and colony formation.

Small jumping spiders will work in an environment with plenty of ground cover for them to hide; house spiders will work in anything, since they can generally build webs/ walk on glass.
User avatar #2830 to #2829 - istartedthewar ONLINE (08/29/2014) [-]
Never tried to make one, but i found one once when I was camping.

It was in a gatorade bottle from the 70's, and it had soil and a couple plants growing in it and shit. It was pretty cool.

I guess it wasnt completely closed though because it had no lid, but it was still pretty cool.
#2825 - thereasonableperso (08/27/2014) [-]
I'm not sure where to put this. Is combinng like terms (in maths) relevant to any careers? I can't find anything about it.
User avatar #2826 to #2825 - geothermal ONLINE (08/28/2014) [-]
You mean like...

10x+5+2x = 12x+5?

Thats like, basic fucking math. You need that in pretty much every career.

Like, shit, you have 4 packages of mcdonalds hamburgers, another 2 packages, and 5 spare burgers. One box = x so you have 4x+2x+5 = 6x+5

This is useful in everything.
#2827 to #2826 - thereasonableperso (08/28/2014) [-]
No it's more like...I can't type it out very well. X Squared and Y cubed, over 2X and M to the fourth power + or - a similiar figure.
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