Archived threads in /sci/ - Science & Math - 129. page

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>>9119305
Shadows, how do they work?

https://www.youtube.com/watch?v=FmoW-gNjjXA

First, the moon is much smaller than the earth. So the moon's shadow covers only a limited region of the earth. Then the earth rotates. No eclipse at night, cuz the sun is on the other side. The earth turns and after a while the eclipse is gone, i.e. the moon has moved away from covering the sun.

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>>9119305
You can get them anywhere on Earth.

well if you must
g^tx+$ ; %¥€¢^°={32x)over the circumference of Gust)}=√π÷

It's really just a way of tracing human movement over time. A paternal haplogroup is a mutation that is inherited through the Y-chromosome. Generally, whenever a bottleneck event occurs (e.g. mass extinction, migration), nearly an entire population will possess a mutation unique to the few individuals who underwent the bottleneck and restarted the population. They don't matter at all functionally (they're often SNPs, which are mostly silent mutations).

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>>9120112
I see, thanks for the explanation.

The phase changes of materials are pretty much dictated by the interactions of atoms. Mercury is a liquid at room temperature because the average kinetic energy of the particles (which is what temperature describes in the first place) is enough to overcome the forces that would hold the atoms together in a crystal lattice. Tungsten probably has such a high melting point because its electron configuration/size/interaction with other W atoms is such that it has an incredibly stable crystal structure, relative to other metals.

This stuff really doesn't have much to do with them being metals however, because the theory behind melting/freezing points applies to all materials. "Metal" is a label given to elements that tend to have similar chemical behaviors that are a result of how their electrons are arranged around the nucleus, e.g. they are conductive because they freely share electrons with each other, they are likely to give up electrons in a chemical reaction, and some other features that I can't name off the top of my head. They also tend to be more ductile and malleable than nonmetals in the solid state, which mechanically tend to be a bit brittle. I'm probably missing some more details.

Those are physical properties while metals are usually defined by their chemical properties (how they act in molecules). Actually I don't think metals are really rigorously defined but they can generally form solids of atoms of purely one element, as in mercury metal which is a liquid at room temperature. I haven't studied this specifically but I'm sure it's because pure metal solids are arranged in a lattice that is very stable (imagine putting ping pong balls into a box and shaking it around, they will form a dense lattice). The energy required to take an atom from this lattice is well-defined and for Mercury it isn't as large as it is for Tungsten or other metals. High temperature means a higher energy enviroment that can transfer the energy it the metals. Taking an atom from the lattice can mean either making it a gas (completely off the solid) or a liquid (semi-attached to the other liquid atoms).

>>9118615
god wanted it to be that way

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>>9118603

It's ok

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>>9118603
Well I imagine your stoichiometrics have to be correct. If you were given the redox couples I wouldn't consider it right, if you just has to count the charges(Oxygen would always be +II) VII+ is correct.

yeah stare straight at it nothing bad could possibly happen

just buy a welding mask they're like 40 bucks

>>9118523
Yep, do it you frogposter.

>>9118522
I don't care if this is bait, the eclipse doesn't damage your eyes, it's the sudden change when the eclipse starts waning and the sun starts coming into your eyes causing your pupils to do a resource intensive adjustment as well as not being fast enough to adjust to block the rays which is what damages your eyes.

>>9118543
this is also bait

don't look at the sun kids

>>9118543
>the eclipse doesn't damage your eyes
only at the moment of totality.

>>9118482
no. 14 welding glass/goggles

google your local libraries/unis and see if they're giving them away

lots are during the event

BUMP
I need to now this or I will miss the eclipse
I'm in Hawaii so it will be tonight

>>9118001
It's not actually possible to build such a computer. Via your ability to act on its results, any simulation of the future must necessarily include it's own future, meaning the computer has to perfectly simulate itself + some other system and find out the future of these systems. This is obviously impossible otherwise you could have that simulated computer run the same algorithm to perfectly simulate itself + some other calculation and repeat in a chain that gives you infinite computational power.

>>9118079
I see.
Thanks.

>>9118001
>Posts anime
>Uses tripcodes
>Also, if the universe if fixed, then how come you are mad at me if it was inevitable that I posted this? (delusional)
>Also, why the fuck am I so depressed, does the universe hate me (delusions of reference, depression)

M E N T A L
I L L N E S S

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>>9117831
bump

>man wears coat in cold weather

DETERMINISM PROVED

>>9117831
I totally agree

huh

whaa

ay ur fuckin autistic get over it B)

Yes. Even if that pleasure comes from feeling good about feeling bad.

>>9117477
We are all hankering after pleasure. The living entities, like the Lord, are full of consciousness, and they are after happiness. The Lord is perpetually happy, and if the living entities associate with the Lord, cooperate with Him and take part in His association, then they also become happy.

The sage feels transcendental pleasure in the gradual advancement of spiritual culture, whereas the man in materialistic activities, being asleep to self-realization, dreams of varieties of sense pleasure, feeling sometimes happy and sometimes distressed. Sensual pleasure is materialistic in nature, and thus is temporary and ultimately unsatisfying and does not bring happiness. Transcendental bliss however is very satisfying, ever increasing, and fulfilling.

I believe that everything we do is for fun, ultimately. Maintaining habits is a lot of fun. We should choose our habits wisely.

>>9117462
>What would happen to our Legs if we stand all the time we are awake?
Nothing, some people do pretty much that already. It's weirder that so many people spend the majority of their time sedentary nowadays.
>And what would happen if we could stand 24/7 even when we are asleep?
You would need legs that have a different structure to them where they can align vertically and lock in place so that they wouldn't collapse when you lose muscle tone after falling asleep.

you will get varicose veins

>>9117462
Standing is harder on the body that walking.

>>9117381
I don't know a lot about particles so I just think of them as baseball's XD

>>9117385
kek

i mean you have to know what you're talking about with physics to understand goldstein anyway, it's not an intro book

>dames

The female form is fucking vile.

>>9116877
Notice they are still over on the brainlet's side.

>>9116884

engineer detected

because psychology is a pseudoscience

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>>9116672
Say that to my face, you fucking goy bitch.

>>9116699
>freud
literally the king of pseuds