Most fertilizers contain chelating agents like DTPA and EDTA. Do these get absorbed into plants and are they harmful?
No and no.
Yes and yes.
>harmful
no
>taken up
no, they're large molecules (so they won't diffuse) and plants dont have transporters for them
Is it illegal to install robotic appendages onto ones own body?
>>8462123
Are you asking for a "friend" who has already been augmented?
>>8462126
You could say that...
Not yet
What is the scientifically best way to save myself from thinning hair? I want thick hair again:(
Reduce stress, stop combing your hair so much, and have good gene's.
>>8462113
You should see a doctor. Probably you will be prescribed a drug called finasteride
In a lot of press releases and demonstration demos of the new railguns... They go on about how they can hit targets 150 miles away, at high speed, etc...
Why?
It shoots a metal dart. At the speed it is going at, won't it just pass right through its target? Like an enemy ship or plane... Won't it just pass through their hull/interior walls/and then the opposite side of the hull leaving a little hole?
I mean a bullet hitting paper doesn't make the paper explode. Why would this be any physically different?
I would get its use as like a point defense weapon to shoot down incoming munitions, but the current model they are going to deploy in the next few years is huge and meant to be used as artillery more or less...
If you could build one in space you could destroy a small country like Israel in one shot
Not needing any explosive material is a huge deal, its what sinks ships or ruins tanks when they are hit
Cheaper to shoot
Higher muzzle velocity = higher range
Yeah but that's what I am asking.
The projectile is traveling so fast and has so much energy that it will tear through the ship with no effort and never even have a chance to transfer its energy to the target. It will just put two little holes on the ship, one entrance and one exit.
Like a bullet has a small entrance and a large exit wound... But that's because the bullet is traveling slow enough and our bodies are strong enough that the slow the bullet and transfer the energy from the bullet to our flesh which tears it apart.
Won't it never get a chance to do that here because it is moving at like Mach 7 or something... It will be in and out in milliseconds without having transferred any energy.
If you had 100 billion dollaridoos and near the end of your life, what project/field would you dump your wealth in and why?
Also why do you think it's better for billionaires like Gates to burn money on African kids rather than actually productive causes?
>>8462306
By burning those African kids, we are preventing shit tier genes from being passed on.
If I had 100 billion dollaridoos, I would probably use it to appoint Putin as the world leader, 1984 style.
I would build a mega city in Northern Canada.
Or perhaps I would build a Mega prison colony on Baffin or Ellesmere Island.
>>8462306
>Also why do you think it's better for billionaires like Gates to burn money on African kids rather than actually productive causes?
The bigger the population of Africa, the faster Europe and America will be flooded with immigrants, the faster white people will dissapear.
What do you guys think of this one?
https://www.kickstarter.com/projects/1174653512/isaac-newtons-principia-mathematica-reissue
>>8461651
If you're into the history of mathematics it looks great.
>>8461651
>45000£ to publish a book
>>8461651
$45 for a copy of a book that I can pick up on Amazon for $1? Sounds like a bargain!
>Every even integer greater than 2 can be expressed as the sum of two primes.
Since any prime cannot be even numbers, they have to be odd numbers. Odd numbers can be represented using "2n + 1".
So for any 2 primes we can have an even number because 2k + 1 + 2n + 1 = 2(k + n + 1)
now tell me why i am absolutely wrong...
>>8459694
>proof is left to the reader
That doesn't prove that all even numbers can be written as the sum of two odd primes, it just proves that two odd primes always sum to an even number.
>>8459726
>odd primes
do even primes even exist?
The only thing I value is intelligence, and I know that I'm actually very stupid. This makes me want to die. I always forget how to do anything shortly after learning it when it comes to math. I can remember how to solve an equation for maybe a day or two before having to relearn it, and I can't tell you what my answer actually means anyway. I've done this dozens of times and over a number of years.
Can't even tell you boys how much I hate this.
>tfw can't even do calculus
Is way worse than
>tfw no gf
I graduated college with a shit degree in something stupid and just barely passed the baby-tier math (stats 1 and college algebra) I had to do for that. I finished 3 years ago and I can't get over that I'm stupid; I have nothing; I have a shit body, shit mind, shit soul.
What can a brainlet do to improve his math skills?
Practice
Intelligence isnt real. The dumbest motherfucker I met got 2 masters from Stanford and a PhD from MIT, I can gurantee you are smarter and a better person than he is. Who gives a fuck about math, doesn't mean shit.
lower level math like calculus is just grinding
higher level stuff is a bit harder to practice for because there's rarely a general method to solve problems or prove things, so you need to improve abstract mathematical thinking, which is a lot like training for being a math detective
a lot of people say you're born with a "math gift" or some shit, which may be true for some people, but i am 100% certain i was not born with such a thing and i've done very well in math
i would argue that it does require a certain degree of masochism though
So I've been playing the new battlefield 1 and got somewhat interested in zeppilins (I've always figured it was kinda stupid as one could just puncture the balloon and it would go down).
So apparantly it was not quite that simple, the hydrogen was kept in separate cells where the airship would remain aloft even if a great number of cells were punctured.
In Battlefield you get to traverse the inside of one such ship, where I assume that the hydrogen is kept within the metallic containers. I kinda got stuck however, cause it really seems to me like these containers hang from a simple joint from the roof.
Anyone else played this game and gotten confused by this? Did DICE fail basic physics? Are those not the hydrogen compartments?
You can see a gif of the same situation here:
http://i.imgur.com/YHqr7zq.gifv
My problem of course is that they hang, shouldnt they rather push upwards due to generating lift?
Why couldn't they push from where they are hanging if the structure is rigid enough?
>>8462263
It's a videogame, of course it isn't accurate. This 'airship' was probably designed by people with art degrees
>>8462309
It is a consequence of using a penalty based physics engine.
Hi /sci/ I used to be an extremely bright student, debating with my professors and never getting anything less than an A on tests, my strength was mathematics. Currently I'm 8 months after finishing accutane and I've lost all motivation since 2 months into the drug, I look the best I ever have but on the inside I'm a rotten unmotivated piece of shit. How can I rebuild my love for the sciences?
>>8462169
How much time has passed since you (for real) studied math or physics?
>>8462169
>blaming your problems on an acne drug
there is likely something more than that contributing to your feels
>>8462169
maybe you're doing social things that distract you from science or fulfill you enough so you're happy without feeling good about your grades.
I've been out of school for years. Went back this semester and I'm taking preCal. I've had no problems so far. We got into Logarithms last week and I'm having trouble seeing what it's going to be used for. I also thought taking the root of something was the inverse of exponents, teacher is saying this is. This seems just another way to write exponents. We're not doing anything complex with the logs yet, but I feel we're about to I want to understand what their purpose is and how they work before we move on so I'm not fucked.
They're important for Complexity Theory.
>>8462016
logs turn exponential functions linear and products into sums.
I'm of the opinion, that you should never show an exponential fit plot, but use a log plot and use a linear fit. If that makes sense...going a bit on sleep deprivation at this point.
>>8462016
there are loads of natural phenomena that exhibit exponential or logarithmic behavior with respect to time. google exponential decay for some context
>nuke the north and south pole on mars
>buttloads of co2 released
>temperatures rise to warm and comfy
>added co2 increases pressure
>mad max: the world
>only difference: you have to wear an oxygen mask
co2 isn't a greenhouse gas, it won't increase the temperature on mars
and you'd need a lot of nukes to do this
>>8459537
Go away Elon
>>8459543
>co2 isn't a greenhouse gas, it won't increase the temperature on mars
wrong
>and you'd need a lot of nukes to do this
we've got plenty of nukes
>Gauss
Incredible at mental arithmetic, eidetic memory.
>Von Neumann
Incredible at mental arithmetic, eidetic memory.
>Euler
Incredible at mental arithmetic, eidetic memory.
So, /sci/, why do you even bother?
>>8458625
>neumann
I see what you did there ;)
i guess i will not be one of history's most renowned mathematicians, like the entirety of this board
>>8458625
Because they're dead. Someone has to carry on their work.
Name it if you can
>Reminder: /sci/ is for discussing topics pertaining to science and mathematics, not for helping you with your homework or helping you figure out your career path.
>If you want help with your homework, go to /wsr/ - Worksafe Requests.
>>8461906
i can't, tell me
Whats the hardest major, and why is it engineering?
>>8461827
The hardest major is the one that you enjoy the least
>>8461827
Engineering is hard, you're right.
After all, what kind of engineer sucks a soft dick?
>>8461848
fpbp
Maths is harded though modulo motivation