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/sci/ - Science & Math


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12411578 No.12411578 [Reply] [Original]

have we learned anything? like anything at all in the last almost a year about the coronavirus? feels like we still have no idea what this is or how it works and the governments are just winging it and we have no idea what to do except tell people to go be sad at home

>> No.12411595

We learned it was all a hoax by the mask jew



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12411562 No.12411562 [Reply] [Original]

How much time should you spend doing the math?



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12411546 No.12411546 [Reply] [Original]

My mechanical timer broke. I tried open the casing but the faggot producer used tri-wing screws. Is it worth the money buying a tri-wing bit or should I just buy a new timer? It’s a mechanical timer so I figure it shouldn’t be too difficult to repair if I only get the casing open? But when will I ever use a tri-wing bit again?



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12411518 No.12411518 [Reply] [Original]



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12411515 No.12411515 [Reply] [Original]

If you're abything like me, you'd know that there's nothing more comfortable and blissful than the thought of being tucked up snug in your warm bed with your head under the blankets, lights turned off, listening to the sound of a thunderstorm or blizzard outside rocking your bedroom window.

As it turns out, most people love the thought of this, as evident by all those "rain sounds for sleeping" videos on Youtube. Why is that? What is it about this scene that relaxes us so much? Does it provide a sense of security for us to settle down to?

>> No.12411526

You are doing good service to the code, s o it releases inbuilt drugs to reward its vessel. We are all slaves in a dick contest between literal sequences of numbers, who don't even care about the result because they don't need to.



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12411513 No.12411513 [Reply] [Original]

What's the science of huge difference between internet bonding vs IRL bonding?

in the most extreme example I can laugh my ass off and reply to a stranger making a StarCraft quote on a porn video but if a stranger did that in real life I would most likely be horrified.



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12411504 No.12411504 [Reply] [Original]

Can I get uhh.. airless water?

>> No.12411510

>>12411504
Have a drink anon. You're thirsty aren't you?

>> No.12411534
Quoted By: >>12411543

What kind of toilet is that?

>> No.12411543

>>12411534
/r/forbidden_toilets

>> No.12411559

>>12411504
>goes great with a smoke

>> No.12411583 [DELETED]

>>12411504
>liquid hydrogen
you mean liquid nitrogen, right?
that doesn't seem a dewar that would withstand 0K



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12411480 No.12411480 [Reply] [Original]

scientifically speaking, how can mirrors be real if our consciousness isn't real?



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12411461 No.12411461 [DELETED] [Reply] [Original]
Quoted By: >>12411464

>go on /sci/
>scientifically speaking, (stupid question)
>/his/
>historically, (stupid question)
What is the scientific reason behind this phenomenon?

>> No.12411464

>>12411461
low racial iq aka niggers



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12411445 No.12411445 [Reply] [Original]

What if science discovers some new weapon that can blow up the whole planet, and it's really easy to make one in your garage for example, and some lone nut could blow up the whole planet needing only very few resources, should that discovery be published?? Would its publication become inevitable?? FUCK

9 posts omitted.
>> No.12411564
Quoted By: >>12411575

>>12411463
>already exists essentially
Which kind?

>> No.12411575
Quoted By: >>12411581

>>12411564
a big H bomb I guess

>> No.12411581
Quoted By: >>12411586 >>12411589

>>12411575
Doubt that is capable of blowing the entire planet
And even if the planet got blown away won't the pieces clump together again after some time?

>> No.12411586

>>12411581
>won't the pieces clump together again after some time?
yes... with the uranium of the core floating around your house and irradiating everybody. Plus it would take millions of years for the planet to become compact again I guess

>> No.12411589

>>12411581
>Doubt that is capable of blowing the entire planet
During the cold war the USSR had 10 times the amount of atomic bombs needed to blow up the whole planet



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12411370 No.12411370 [Reply] [Original]

What's going on here?

2 posts omitted.
>> No.12411454

Eh, either do it in front of CSICOP or it's just a magic trick.

>> No.12411473
Quoted By: >>12411494

>>12411370
This dude actually completed No nut November

>> No.12411494

>>12411473
kek

>> No.12411498

>>12411370
he watched haruhi in every order possible

>> No.12411506

>>12411370
>metronomicon



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12411356 No.12411356 [Reply] [Original]
Quoted By: >>12411398

Mathematically speaking, how would you desribe the following the relationships:

A volume of 1 m3 containing 10 molecules
1 metre containing 100 cm

while 0.1m3 can contain any number of molecules as long as the total sum of the molecules in all 0.1m3 is 10, 1/10 of a metre must contain 10 cm.

Why is that?

>> No.12411398

>>12411356
because length and volume are different

think of what a cubic meter would have to look like in terms of cubic centimeters
if you were to take 100 cubic centimeters of matter (literally 100 little cubes), they would form a line of 100 little cubes, the dimensions of that formation would be 100 cubic centimeter long, 1 cubic centimeter high, 1 cubic centimeters deep (or 100x1x1 cm3)
to make it into a meter-long and meter-high plane of little cubic centimeters, you would have to stack 100 of these lines on top of each other, resulting in a formation with dimensions 100x100x1 cm3
similarly, in order to make a cube a meter high, a meter long, and a meter deep, you'd have to stack 100 of these planes, which would result in a cube with dimensions 100x100x100 cm3
if you multiply the original cubic centimeter by these dimensions, you get 1'000'000 cubic centimeters

also, this is fucking 3rd grade material and you are fucking retarded



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12411347 No.12411347 [Reply] [Original]

Mathematically speaking, how would you desribe the following the relationships:

A volume of 1 m3 containing 10 molecules
1 metre containing 100 meters

while 0.1m3 can contain any number of molecules as long as the total sum of the molecules in all 0.1m3 is 10, 1/10 of a metre must contain 10 cm.

Why is that?



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12411312 No.12411312 [Reply] [Original]

What if they decide we're lunch

>> No.12411342
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12411342

better cover ourselves in some Round up'



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12411301 No.12411301 [Reply] [Original]
Quoted By: >>12411352 >>12411388

Does anyone know any good learning resources for electronics? I'm at uni doing compsci but have an electronics module that makes me go REEEEEEEEEEEEEEEEEEE

Maybe I'm just retarded?

1 post omitted.
>> No.12411338
Quoted By: >>12411418

code monkey can't handle real science shocker

>> No.12411352

>>12411301
youtube exists for brainlets like you

>> No.12411388
Quoted By: >>12411422

>>12411301
The Art of Electronics is a good resource.
You can get it on library genesis.
EEVBlogs on youtube is good as well.
What is the content of the course?

>> No.12411418

>>12411338
>electronics is science
kek
>shocker
Indeed.

>> No.12411422

>>12411388
>>12411322
Thanks for the recommendations, EEVBlogs seems to cover the content I need, but I'll look into the other ones too

Currently working on designing a transmitter and reciever to send an audio signal across a metal bar. I've printed the receiver PCB just stuck on the soldering and breadboarding the transmitter. Missed a bunch of laboratory classes this year cause I had the china flu and it's been hard to catch up on the practical side.



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12411294 No.12411294 [Reply] [Original]

in the maths exam i just took, you only needed 14% to pass (45% for an A). what makes maths disproportionately hard compared to other subjects? is it badly taught?

3 posts omitted.
>> No.12411519
Quoted By: >>12411520

>>12411481
me basicly
how can it be that i did ALL the training qustions from the calaoge twice and still sit in the exam like an idiot.

how am i supposed to know if nobody told me that i had to know?

>> No.12411520
Quoted By: >>12411553

>>12411519
instead of victimizing yourself, actually learn from your mistakes or drop while you can. Nobody in the real world is gonna tell you what you need to know. If you're asked to do something, you do it or they find someone else who can.

>> No.12411553
Quoted By: >>12411556

>>12411520
i work a confy part time job.
i have no intresst in a career anyway.
i'm in universty cuz it's confy and i like the people.

yet, i thing they sould tell me, learn to handle this types of excersises, and if you can solve all of the above we let you pass.

>> No.12411556

>>12411553
just give me the D allready

>> No.12411560

>>12411483
sounds like you go to a piss easy uni

must be a dumbass american who's used to easy exams. if a student can get 70% on a test, the test is clearly not difficult enough



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12411271 No.12411271 [Reply] [Original]

Why do we allow inconsistent notation to defile mathematics?

1 post omitted.
>> No.12411286

>>12411278
That is nst aniie Ehing tssay. Please Show me my deductisnal error

>> No.12411413

>>12411271
Should be defined at the start. It's a way to group vaguely related syntax to have fewer syntactic structures to remember. Many such cases. Sometimes it causes more harm than good, especially when people refuse to define and bulli if you can't understand from context.

>> No.12411435

sin^2(x) should be sin(sin(x)) and sin(x)^2 should be sin(x)sin(x)

I hate people who write sin^2(x) to mean sin(x)sin(x) when they use sin^-1(x) to mean arcsin(x)

Inconsistent fucking retards.

>> No.12411460

>>12411271
Second notation is composition not multiplication

>> No.12411471

>>12411271
it's not inconsistent you dumb retard
sin^2(x) is sin(x) * sin(x) as per the definition of taking something to the power of 2

in line 2 you assert that taking sin^2(x) is the same as taking the sin of sin(x), which runs contrary to the definition because that's not what it is



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12411267 No.12411267 [Reply] [Original]
Quoted By: >>12411359

How do I stop sub-vocalizing my thoughts? I'm referring here to thinking in general, not only when solving a problem.

>> No.12411359
Quoted By: >>12411397

>>12411267
why do you care
there's 0 evidence that visual/non-visual and auditory/non-auditory thinking influences your cognitive performance on any task

>> No.12411397
Quoted By: >>12411465

>>12411359
it's faster

>> No.12411465
Quoted By: >>12411538

>>12411397
No it isn't.

OP sounds like a coper who doesn't understand how internal vocalization works.

>> No.12411538

>>12411465
?



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12411223 No.12411223 [Reply] [Original]
Quoted By: >>12411426

https://nypost.com/2020/11/30/european-space-agency-to-launch-space-claw-to-clean-up-junk-orbiting-earth/
Ai copy desu!

https://www.youtube.com/watch?v=vjwGnix8Vsk

>> No.12411426
File: 27KiB, 609x250, Werner Locksmith - Planetes.jpg [View Same] [Google] [iqdb] [SauceNAO]
12411426

>>12411223
Based Panetes poster.
>estimated to cost well over $100 million — making its long-term value questionable.
Cringe.
Anyway, we are long fucked with Starlink, Oneweb, Project Kuiper, and whoever comes from China and probably India too, eventually.
It will be a mess littered to the brim with junk, just like what happened with the oceans.

>> No.12411503

>america shits up space
>europe has to clean up



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12411222 No.12411222 [DELETED] [Reply] [Original]

No taxpayer money should be wasted on useless """research""". If you think otherwise you should be gassed.
I'm not gonna change my mind.

>> No.12411234

>>12411222
i agree

>> No.12411247

>>12411222
i can tell by the colors of that fat smug frog that this is a politics thread

>> No.12411251

>>12411222
t. chinese manipulator

>> No.12411259

>>12411222
You are proclaiming a controversial and contested opinion, while also confirming that this isn't a discussion and you are only here to spread your views.
This is propaganda actively making the board worse.
Where are the jannies?

>> No.12411261

>>12411222

You don't own your money. Nothing is private.



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12411201 No.12411201 [Reply] [Original]
Quoted By: >>12411218 >>12411293

>Why yes, I do teach physics at the local community college. How on earth were you able to discern that?

>> No.12411218
Quoted By: >>12411289 >>12411394

>>12411201
My CC physics prof was jacked, like seriously fit. Honestly, what is it with these threads that never describe actual real world situations? People need to respect professors more, too. It takes at least a master's degree, which is several years of torture and living in basic poverty, only to be belittled by students when they finally get the job. Not only that, but physics is already a seriously difficult subject, and I daresay the coursework is leagues above all others.

>> No.12411289

>>12411218
>several years of torture and living in basic poverty
lol I got mine for free in one year and got paid for it. Never even wrote a thesis before

>> No.12411293

>>12411201
TRUE

>> No.12411394

>>12411218
KEK seething physics prof



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12411191 No.12411191 [Reply] [Original]
Quoted By: >>12411268 >>12411447

Neurons are said to predict future.
Neurons are said to oscillate by action potential.
How can oscillation predict future?

>> No.12411204

OPs are said to suck massive amounts of dicks.

>> No.12411268

>>12411191
provide a source.

>> No.12411410

https://en.wikipedia.org/wiki/Free_energy_principle
This theory about brain is based on prediction.

>> No.12411447

>>12411191
>>>/x/



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12411188 No.12411188 [Reply] [Original]

Hey /sci/. Can you help me with this?
I have two angles: APO = alpha and BPO = theta. These two angles are contained in perpendicular planes. The question is: knowing the values of alpha and theta, what's the way of knowing the value of the angle APB? Pic related.
Thanks in advance

>> No.12411295

nvm, figured it out.
I used the properties of the scalar product and it turned out the cosine of APB is equal to the product of the cosines of alpha and theta.



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12411156 No.12411156 [Reply] [Original]

What are some impressive things one could make in your typical highschool science lab? I'm a substitute teacher and I've been given a bit of creative freedom tomorrow with the kids I'm teaching.

8 posts omitted.
>> No.12411229
Quoted By: >>12411232 >>12411239

>>12411221
Literally just want one trick, but thanks.

>> No.12411231

>>12411200
in depth breakdown of electoral vote manipulation techniques?

>> No.12411232

>>12411229
Then pick one. Subs, man.

>> No.12411239

>>12411229
get a stick, broom handle, ruler, etc, etc
tell the kids they get a reward if the can balance it
when they fail, supportr the stick with two fingers and slowly move them towards he centre, this will find the balance point

>> No.12411440

>>12411158
https://www.youtube.com/watch?v=BHiWygziyso



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