What is the best way to memorize the multiplication chart. I had a very poor education growing up...
Learn how to multiply numbers.
Easy trick.
7*6=42
Its 7 + 7 + 7 + 7 + 7 + 7
Or
Its 6+ 6 + 6 + 6 + 6 + 6 + 6
Just do that until it comes natural to you. By fourth grade, you wont need a times table! :^)
you don't memorize it
>>8343802
The best way is actually using it
>tfw you get a lab partner that rarely shows up to class, doesn't respond to email and doesn't seem to have any interest in completing the labs/assignments properly
Is there literally anything fucking worse?
>>8343771
>You get a student who whines to you at the eleventh hour begging for his grades because his lab partner was shit. However, he was too autistic to just tell the professor that his partner wasn't working hard enough.
>>8343773
I fully intend to throw him under the bus if it comes to that.
>>8343771
Nigga what kind of school do you go to where you need your lab partner to do the assignment?
Like every basic lab I've ever had/ran at multiple schools have had students work together to do the lab itself, then do their own independent report.
I say basic because I've seen group lab stuff but only for senior year capstone-like courses where your group is turning in like a 40+ page lab report every week. And you choose your own groups for those.
Why are the laws of physics what they are? Who decided them? Why can't they be broken?
>why
It's all just memes friend
>>8343767
God decided them
We don't actually know if they are laws.
We assume they are, since they haven't failed yet.
Why is going back to the moon so hard?
I mean I understand the concept that moon landings ended because they were relatively expensive for few rewards but I can't understand why a space agency right now, if it decides it wants to do a moon landing, is woefully and completely unequipped to pull off a mission that could be done on an almost regular basis half a century ago
We never been there, that's just a fact
>>8343759
There's no reason to go back, for now. It's not a wise choice of already limited funding.
Even if NASA had the same budget it did in the 70's they'd rightly spend it on unmanned rovers, probes, space telescopes, etc. It's more science discoveries per dollar.
I've been thinking about this particular idea for a flying vehicle propelled by manipulation of magnetic force for a few months now. I got the idea after taking the bus from College of San Mateo to the Caltrain station after school. It's a beautiful bus ride with scenery of nature, the mountains, and huge redwood forests. Basically, it's a polymer prism or ball (whatever works), and the pilot sits inside. A is a rolling magnet cylinder and B and C are magnets of the opposite polar direction. Something like that. The pilot controls movement of the flying prism, or ball, and the steering options trigger certain locks or rolls of magnetic items. The whole propulsion system works by the opposing force between magnets.
Why don't you draw a force diagram instead of a shitty MS paint pipe dream and think about how this is mean to propel something.
>>8343746
Because it's a simple to understand system
>>8343798
This could work but any vibration at all will perturb it and cause the magnets to stop moving
How do I calculate odds? I've never been good at this despite being naturally gifted at proportions.
I'm trying to come up with a way to determine the likelihood of drawing any specific combination of cards in a 40 card deck.
>>8343696
Get to work
Introduction to Mathematical Statistics
https://www.google.com/url?sa=t&source=web&rct=j&url=http://math1.snru.ac.th/UserFiles/File/math1%40snru/2556/HOGG%3B%2520CRAIG%2520-%2520Introduction%2520to%2520Mathematical%2520Statistics%2520(4th%2520Edition)(1).pdf&ved=0ahUKEwjY26T6543PAhWr5IMKHdSNDVkQFggsMAI&usg=AFQjCNHfLKb7bcq8ZhvN-p6tq0sKk1s07A&sig2=mcgFpKVh7JgTlFbSjKqlsg
>>8343696
Here you go.
http://www.ime.usp.br/~walterfm/cursos/mac5796/DoctrineOfChances.pdf
First line:
>The probability of an event is greater or less, according to the number of chances by which it may happen, compared with the whole number of chances by which it may either happen or fail.
Thanks broskis.
sup /sci/
looked in the wiki and couldn't find anything. could you guys recommend me some good books on DC brushless motor design?
>>8343671
read some TI datasheets
>>8343701
do they give you design guidelines for motors? it's not the controller I'm trying to make
>>8343777
No, are you actually trying to make a brushless DC motor?
I assumed you were trying to design something that just uses one
I'm in my first year of grad school studying Statistics. 80% of my fellow students are Chinese. Is this supply/demand phenomenon? IQ? Curious for feedback.
Prob. S/D.
>>8343632
Country?
Number of students?
>>8343632
Think most of the stats people here are some form of Asian. The older Asians are almost always algebraists, though.
>studying geometry
>no pictures
>>8343490
>So here is a diagram of an object embedded in 27-dimensional space...
>>8343490
>affine geometry
>proof on 9 A4 pages
>no image
I feel u
>geometry is strictly 3D
Prove 2+2=4 without asking me to have faith.
>>8343285
Define "2"
Define "4"
Define "+"
Define "="
Then I will answer you.
>>8343289
Let's say I took a shit. Then I took another shit. Then I took two more shits.
How many shits did I take?
>>8343301
Define "shit"
And how do we know?
I went to kill a cockroach yesterday and it was surprisingly aware of its surroundings, as soon as I entered the room, it knew. It was also very clever in the way that it tried to hide from me, I was impressed.
So which is the most intelligent insect and how do we know?
insects are just organic robots, they are not any more intelligent than a computer that does what it's programmed to do.
>>8343244
who programmed the insects then? are you saying it's intelligent design creationism?
yes, I think they have varying intelligence. a cockroach seems to be far more intelligent than an ant or a spider from my experience in killing insects
>>8343253
God did it :^)
> "Hi I'm tom Scott"
> already sound exhausted from the 0.1 seconds of talking
> "Today I'll talk about computers."
> Voice gets high pitched from all the talking
> "Here's a mistake most people do regarding colputers"
> "Turn the computer on"
> you should never ever never ever never ever nigger ever never ever turn it on.
> Breathe furiously 5 times to calm to get enough oxygen
> draw shitty drawing on how you turn on a computer.
> "here is what I think will happen with the Internet in the future;"
> "there will be new sites"
> Comment section goes wild
> explains that the Internet was different before.
> cough violently, need more oxygen.
> "this has been a tale about computer"
> almost suffocates
> "And I'm Tom Scott"
> Dies from asphyxia
this is my favorite thread on sci, atm, so I am going to bump it.
p.s. I am eighty five years old.
> "computers use binary which is base 2 which is a thing"
> "computers can be used in missiles which we don't want because missiles are bad"
>MYSTERY BISCUITS
>you are a prisoner. your enter life, everything you ever experience or will know is stored here, within this matrix, and you will NEVER escape.
thoughts?
Shitty quality picture too low res for my matrix and too edgy for me.
Why was I cursed with inferior brainlet hardware?
>>8343164
I don't feel the need to produce some sort of pseudo immortality by "escaping" my wetware. I'll die, just like billions of hairless apes before me, I can accept that.
To what extent does the past "exist"?
Is everything just in a state of "now" that is simply predicated by the past and poised in various states of potentialities in the direction of the future?
Is the past an actual thing or just a concept?
Does the answer to this question matter. What consequences does a yes or no answer have.
There is no past or future only the eternal present.
>>8342977
nice dubs.
what? are you meaning to say this question is more philosophical than scientific?
What causes gravity?
So I'm undergrad in geology and we were talking about how planets form from accretion, which makes sense. Like, gravity attracts smaller masses to bigger masses, sure. But what makes it act this way? By extent, where do any of the 4 fundamental forces come from?
Help me /sci/, I haven't been this mindfucked since I first thought about the conception of the universe.
Mass
Symmetries
Gravitons, we haven't discovered them yet tho