Archived threads in /sci/ - Science & Math - 791. page

One glass per 7 days

Its not that theres conflicting opinions is that the best you get is a ballpark answer. First of all of course you can survive a day without water so your question is immediately phrased poorly. It also depends on factors like gender, age, and size (height AND weight) but even if you expressely gave all of those things you still wouldnt get a perfect answer. Is the person eating or otherwise under stress? Whats the temperature? Is it day time? Is he moving at all? These things change how much water is needed by up to 10x.

>>8723839
Example of brainlet who doesn't know how to answer a question and instead insists that the question is unanswerable.

My answer:
>Obviously there is for each context a specific amount of water in a time interval that will separate organism from live and death

Organism needs water for solvent/diffusion, for isolation, for volume, and for heat purposes. Let's break each one down.

>Volume
Your cells and extracellular matrix requires some specific spatial dimensions to maintain operation. I approximate that death will occur before these volumic properties are relevant, so we ignore 'water for volume'.

>Heat purposes
You need water to distribute heat and maintain integrity in face of heat shocks or cold. We again approximate that death will occur long before your body would have inadequate heat propagation due to lack of water. We also need to sweat to keep ourselves cool.

>Isolation
Water is combined to mucus-protein and other similar systems to keep gastrointestinal tract, ears, eyes, and nose canal protected from oxygen, microbes, and further water loss. This I believe to be very fundamental to why we need water. We are constantly losing water through skin and other interfaces (because thermodynamics) and if things get too dry, they will compromise safety. We name this "MINOR need of water: you need to fulfill these functions or you die".

>Solvent and diffusion
This is our MAJOR need of water. Metabolism produces harmful chemicals that we need to get out of our system through renal and urinary functions. Unfortunately we can't just precipitate these chemicals as we must keep their concentrations locally as low as possible. So as we need to get that 2000 kcal a day, the food we consume is bound to be left with some toxic chemicals, that will need some amount of water to be filtrated out.

>>8723734
DESU einstein's riddle isn't really hard, it's just crossing data. It is fun to solve, though.
I came upon this cute riddle a few weeks ago:
You are the most eligible prince in the kingdom and as such the king has invited you to his castle so that you may choose one of his three daughters to marry. The oldest princess is honest and always tells the truth. The youngest princess is dishonest and always lies. The middle princess is tricky. Sometimes she tells the truth and sometimes she lies. You don't want to get screwed over at this, of course.

Here's the problem: The king wants a smart man to inherit his throne and he doesn't want you to favor any of his daughters because of looks. So he complicated it. You don't know which princess is which. You are allowed to ask ONE of the princesses (any) ONE yes-or-no question ONE time. Then you have to make your pick. What would that question be?

>>8723746
Easy.

"If I asked the other 2 daughters if you were the youngest, would they always say no?

>>8723755
How will you be able to tell the middle one apart if she says yes?

Maybe, but it is unlikely

We'll have fusion power plants eventually, but not cold fusion. The electromagnetic force makes atomic nuclei repel each other unless you get them close enough for the nuclear forces to overpower it. You do this by putting them under intense heat and pressure so they fly together really fast. Cold fusion requires somehow turning off the electromagnetic force; which you can't do.

>>8723604
No its a meme

>>8723500
>What is the mathematical reason why a complex social structure consisting of the richest 1% owning 80% of the planet's wealth is more stable than all the wealth being distributed equally among the people?

>he doesn't know about the populous uprising
>he doesn't know about the sky rocking number of anarcho-commies rioting in the street
>he doesn't know about typical fascist reactionary movement is getting steam due to these new anarcho-commies

Having money makes it much easier to make more money. That's what it really boils down to.

>>8723510
Except that your "mass uprising" rarely happens. Most people just suck it up and stay in their place.

>>8723146

Just suck it up, honestly. In lower division mathematics, there is not a lot of room for creativity. You're just learning elementary methods of computation, and they have to be done in this kinda shitty manner because when you're calculating the nth derivative to plug into a differential equation, you can't afford to make an algebra mistake.

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>>8723164
But it does....get better?

>>8723146
9 times out of 10 when people complain that the prof isn't allowing them to solve things how they want it's not because the prof is a fascist, it's because their methods are either bad or outright wrong.

It's entirely possible she's just a cunt but keep in mind your objective ability to judge what is "senseless rigidity" and what is necessary rigor is beneath that of a high schooler right now.

Will quantum computing really make much of a difference to neural networks? I thought they were way more about parallel computing and limited by how big a GPU farm you can build. Pls forgive ignorance

>>8723022
Clock speed. Quantum computer clock speed is measured in KILOHERTZ. Not gigahertz, not megahertz, but KEEEELOOOHHHHUUUURRRRRRTTTZZ

>>8723022
The most powerful calculation on a quantum computer so far is something like 3x15, but that is great. Imagine calculating 3x15 on 4 atoms.

I think it still depends on the object mass... I mean, they could have 3D and 4D and still have the same mass, right? So they should produce the same gravity...

>>8721723
Depends on its mass.

>>8721760
Exactly anon

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God tier : Biology

Shit tier : everything else

Sheer, Objective "Difficulty":

Dante Must Die Mode:
>Mathematics
>Physics

Hard Mode:
>Electromechanical Engineering
>Computer Science
>Computer Engineering
>Mechanical Engineering

Medium Mode:
>Petroleum Engineering
>Biomedical Engineering
>Chemistry
>Biotechnology
>Materials Science and Engineering

Easy Mode:
>Biology
>Civil Engineering

>>8721674
Arent they already sorted?

depends. Keep it in sunlight and sealed, then never really. UV rays kill the bacteria. only thing u might get is some bisphenyl

>>8721574
>How long
you could refill the same water bottle every day for the rest of your life and it would never be dangerous to drink from.

that water bottle will be safe to drink from (assuming properly cleaned) for thousands of years.

>>8721578
What about millions of years?

>>8720418
>bad teacher
>blames the students
>cries at her own inadequacies

she'll be taking the BBC from her schools varsity football team real soon

>>8720418
I'd say public schools are to blame. Throw them all in the chokee and let them read till they know not to fraternise with the opposite sex, lest they get pregnant and die.

>>8720426
>Her
Op said science teacher stupid.

>>8719255
"black people" and "white people" arent well defined ethnic groups

>>8719275
This.

Closest thing you'll get to an answer might be the first group group of humans to leave Africa, which happened about 60k years ago.

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>>8719297
How do you know Africans didn't have varying degrees of color 60k years ago?

60k years is a blink of an eye in evolution time. Unless there was some active genocide going on, I can't imagine that skin color would be so divided just due to climate effects (hurr durr it cold so we be white).

>>8723064
Is that you Mac?

https://www.youtube.com/watch?v=sZ2bQq4Hgmg

>>8723068
notanargument

>>8723068
One of the best sequences of the show desu

>>8722875
God.

>>8722876
thx
/thread

magnets

That maybe my experiences can influence your ideas.*

How can I build upon what I've learned from a U.S. high school diploma? Where should I start?Fuck College.

What have you learnt OP?

Praise Alt.... Musk.

>>8722633
>god
>prophet
One of these things is not like the other.

>>8722691
>he can't think of any gods that were prophets
it's almost like you're stupid or something.