Archived threads in /sci/ - Science & Math - 156. page
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What would it take to make a windmill for solar winds viable? I don't mean to get energy from the light, but moreso energy from the constant bombardment of tiny high speed particles.
Solar sail tests so far have shown that using the pressure from light can be used to affect flight paths of tiny satellites they are attached too.
But on planets with little to no atmosphere, where solar panel efficiency might be too low, or unreliable, could a solar windmill provide a constant source of energy, for a habitat or underground facility?
What kinds of numbers...
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>>8065260
If solar panel efficiency might be too low/unreliable then the force generated by light will be just as (proportionally) bad.
The source is fundamentally the same (the sun) and so any light generated will be subjected to the inverse square law, be it used in solar power cells or solar "wind"
>>8065266
The solar wind is a stream of energized, charged particles, primarily electrons and protons, flowing outward from the Sun, through the solar system at speeds as high as 900 km/s and at a temperature of 1 million degrees (Celsius). It is made of plasma.
>>8065260
https://en.wikipedia.org/wiki/Electric_sail
Hello /sci/,
I'm trying to estimate the probability of two statistically independent events. I know that in conditional probability
P(A|B) = P(A&B)/P(B)
but for statistically independent events:
P(A&B) = P(A)*P(B)
which means that
P(A|B) = P(A)
This results in charts like this one, where each of my categories ends up with the same probability for each other category. The lines only vary according to the real value of the number of members of that category.
Is there a better transformation I can do on my data, such that each of these...
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>>8065235
>Yvalues
>Xvalues
>>8065270
They are placeholder variable names. Is this better for you?
It occurs to me that these events actually aren't independent. If someone is employed in Agriculture, for instance, there is some chance that they earn band 2 per week, some chance they earn band 3 per week, etc. And this is dependent upon the industry of employment. I just don't know what this probability is, and that's what I want to determine. How do I work this out from what I have?
Pic is the earnings bands the numbers represent.
Hey, /sci/.
I have a weird and open-ended question, so please let me know if this type of thread doesn't belong here.
In the past, I didn't really care about my math classes, and I wasn't interested in math. I did the minimum amount of work needed to get an A, and just memorized enough concepts to do well on tests.
Somehow, I got more interested in math recently and started reading more about mathematics on my own, and I want to learn more about math topics.
However, I barely remember ANYTHING from when I was taking math courses in...
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>>8065182
On on khan academy and MIT open courseware they have some really good shit that will help you out. I know some other ones that I'll get back to you on.
>>8065182
Math grad student from standford here.
I was in the same boat when I was younger.
I dont think you messed up. I think its just a common pathway that many people follow. Going from mindless plug-and-chug A+ to realizing the power behind it and developing a genuine interest for deeper understanding
What are the best and worst engineering degrees?
best: my engineering degree
worst: your engineering degree
>>8065179
Best: an engineering degree you're interested in
worst: one that your parents told you to get that you have no interest in.
This is literally the only answer.
>>8065179
best
math
worst
engineering
What are your first thoughts when you're integrating something?
why the fuck is integration one of the most common math concepts discussed on here? is it really this hard to understand integrals?
>>8065160
I think 'Fuck yea, integration is AWESOME!'
I generally think antiderivative.
You are in a spaceship that has separate rockets pointed to fire vertically, and horizontally.
Suppose you fire your horizontal rocket using 1 unit of fuel, making your horizontal velocity equal to 1. After two seconds, you ship's position is (2, 0), and you have traveled a distance of 2.
Suppose you fire both your horizontal and vertical rockets, using .5 units of fuel for each, and thus 1 unit of fuel total, making your horizontal velocity equal to .5, and your vertical velocity equal to .5. After two seconds then, you ship's position is (1, 1), and...
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Because the two rockets are orthogonal.
There will be a component of force, for each rocket, in the direction you are traveling.
There will be a component of force parallel to this direction, and for each rocket these are equal and opposite.
>>8065084
what
>>8065089
The rockets are working against each other.
Why sometimes I feel like my phone is vibrating in my pocket when it clearly is not? There is a scientific name for this?
>>8064849
schizofrenia
>>8064849
autism
>>8064849
monkey
young indy jones!!
what have you done today /sci/ but masturbate and fanboy it up on the imageboard?
>>8064827
study for finals
>>8064827
I built a base for a post.
>>8064827
went to my physio appointment, got my dick sucked and went up a division in league.
this is pretty fucking cool tho, amazes me nobody else found it as I've been to northern Guatemala and seen the temples and stuff. It's a small place but tbf it is covered in dense jungle and sparsely populated.
How would you explain quantum theory to an ancient without having access to scientific evidence?
>>8064679
They would bash you with a rock, burn your house and rape your wife anyway
easy now try to explain GR or SR
>>8064679
It's easy: Either the cat is dead, or it isn't!
>Philosophy, religion, spiritual bullshit is more important than science because it explains why, rather than how something happens
>If you put all of your "Faith" in science rather than faith, philosophy, spiritual bullshit you are being ignorant and closed minded
How does it feel knowing this is what the average person believes?
You should spend less time worrying about what other people think.
>>8064553
Thinking that science is better than religion and spirituality is literally a philosophical stance though.
For example, there is no sound in space.
>>8064548
Your mom is in love with my penis.
You weigh more in Death Valley than you do at the top of Mount Everyest
On the moon, a brick and a feather fall at the same speed.
Jesus fucking Christ, I hate to say it, but the memes are true. In my baby-tier theory of computing class, two thirds of the class got caught cheating on an assignment, and it wasn't even anything hard. Why are computer science majors so damn stupid?
Blame the university for allowing such people to study there. But then again the university needs them for the money. So blame the education policies of your country.
>>8064530
shit school maybe? is your junior college full of losers who want highschool+ and fuck around all day?
Why do people refer to engineering majors as walking jokes and suckers, when we're always the smartest people in society? Pic very much related.
the more you train your brain to do science the further behind you get at talking to girls
>>8064420
that picture does not prove your point at all though, it shows the top 4 caps at MD, professor, legal, and natural sciences. engineering is significantly lower
engineers really just apply the things that scientists discover, not really a respectable field imo but if thats what you enjoy then w/e
>>8064431
>engineers really just apply the things that scientists discover
Which requires a higher IQ than discovering them.
how do you deal with mediocrity /sci/?
I am utterly failing electrodynamics while all my classmates are doing just fine
>>8064374
You have two options:
>Drop out and pick a course you actually like before its too late
>kys
I simply accepted that I will never be good enough
don't give up
Remember that the talmudic bongo player had a low IQ.
How can I kill all of my gut flora without prescription antibiotics? Would a dilute bleach enema (like 15 or 20 parts water: 1 part household bleach) do it?
Care to explain why you'd want to do that OP?
You have 100 trillion bacteria in the initial 6-inch portion of your small intestine alone. You're not going to kill them all, sorry.
>>8064382
kek, seconded
