/sci/ - Science & Math » Thread #10311650

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Dum dum containment

Anonymous Sun 20 Jan 08:47:31 2019 No.10311650 View Reply Original Report

Quoted By: >>10316223

Studying again!

I found an algebra book, on page 13 now!

Will be asking

Anonymous

Anonymous Mon 21 Jan 2019 01:06:52 No.10313750 Report

Quoted By: >>10313767 >>10313800 >>10313812

How difficult is it to do 5 courses at once? People are telling me I should start with less courses and get acclimated to work again before I go back to school. How difficult do you think these courses would be to manage in the same semester?

Advanced C++
Fiction Writing
Greek Classics
Mathematical Modeling
Software Engineering

Also, what math courses should I take to be better at programming?

Anonymous

Anonymous Mon 21 Jan 2019 01:15:10 No.10313767 Report

Quoted By: >>10313824 >>10314065

>>10313617
I would go into a school and ask for old textbooks. They might give them to you for free.

>>10313750
Is 4 classes going to be closer to 15 credits (or whatever the full time credits is at your school)? More than 15 credits is fucking brutal, I don’t care how high your IQ is. All 5 of those classes are going to be time consuming as fuck as 3 of them are STEM and 2 are writing intensive.

Anonymous

Anonymous Mon 21 Jan 2019 01:18:32 No.10313775 Report

Quoted By:

>>10311880
These are impossible unless the variables are -1, 0, or 1. You literally just have to guess.

Anonymous

Anonymous Mon 21 Jan 2019 01:29:27 No.10313800 Report

Quoted By: >>10313919

>>10313750
>How difficult is it to do 5 courses at once

Normal workload for non-meme majors is 5 to 6 courses + labs/seminars

Anonymous

Anonymous Mon 21 Jan 2019 01:31:10 No.10313812 Report

Quoted By: >>10313919 >>10317717

>>10313750
>Advanced C++
Easy as fuck
>Software Engineering
Easy as fuck
>Fiction Writing
Why are you taking that? and you better not say to write better fan fiction

Anonymous

Anonymous Mon 21 Jan 2019 01:37:51 No.10313824 Report

Quoted By: >>10313919

>>10313767
>More than 15 credits is fucking brutal,
Not really.
> I don’t care how high your IQ is.
IQ is a meme.

Anonymous

Anonymous Mon 21 Jan 2019 02:35:56 No.10313919 Report

Quoted By:

>>10313800
>>10313812
>>10313824
Wow your dick is way bigger than mine. Congratulations.

Anonymous

Anonymous Mon 21 Jan 2019 04:08:02 No.10314065 Report

Quoted By: >>10314182

>>10313767
It's gonna be 15 credits of the total 120, thanks for answering

Anonymous

Anonymous Mon 21 Jan 2019 04:19:47 No.10314089 Report

Quoted By: >>10316229

>>10313558
stop larping and posting this every time lang is mention

Anonymous

Anonymous Mon 21 Jan 2019 04:23:53 No.10314096 Report

Quoted By: >>10314103 >>10319862

>>10311661
The question is asking you to calculate the amount of energy it takes to bring 2.2 kg of ice from -20 C to -196 C. To get this energy, nitrogen has to vaporize, changing its phase from liquid to vapor. Solve this energy balance equation to get your answer:

$<br />m_{H_2O}\int_{T_i}^{T_F} C_{P,H_2O}~\text{dt} = m_{N_2} \Delta H^{Vap}_{N_2} <br />$

Anonymous

Anonymous Mon 21 Jan 2019 04:26:01 No.10314103 Report

Quoted By:

>>10314096
Should be $\text{dT}$ , not $\text{dt}$ . Also, keep in mind the phase of $H_2O$ .

Anonymous

Anonymous Mon 21 Jan 2019 04:39:55 No.10314151 Report

Quoted By: >>10314167 >>10314181 >>10314202 >>10314399 >>10314577

im taking
Algebra 2
Analysis on Manifolds
ODEs
Applied Complex
Art History
Data Science
That's 19 credits
Am i fucked?

Anonymous

Anonymous Mon 21 Jan 2019 04:47:35 No.10314167 Report

Quoted By:

>>10314151
It's doable, but you'll be spreading yourself thin. I'd avoid it if I could.

Anonymous

Anonymous Mon 21 Jan 2019 04:53:17 No.10314181 Report

Quoted By:

>>10314151
No.

Anonymous

Anonymous Mon 21 Jan 2019 04:53:44 No.10314182 Report

Quoted By:

>>10314065
Sounds tough but manageable. Good luck.

Anonymous

Anonymous Mon 21 Jan 2019 05:03:50 No.10314202 Report

Quoted By:

>>10314151
On the off chance that this isn't a meme:
art history and analysis on manifolds is already gonna take most of your free time. This is not doable.

Anonymous

Anonymous Mon 21 Jan 2019 05:48:04 No.10314355 Report

Quoted By: >>10317718

>>10311806
I did thanks

Anonymous

Anonymous Mon 21 Jan 2019 05:49:36 No.10314358 Report

Quoted By: >>10314390 >>10314501 >>10316625

>>10313743
Shitty school and terrible education + parents didn’t give a shit about education

Anonymous

Anonymous Mon 21 Jan 2019 06:02:49 No.10314390 Report

Quoted By:

>>10314358
Work hard brother. Don't forget the board you're on, so people are gonna think they're better than you. That's how it works, but it doesn't at all mean you're hopeless.

Anonymous

Anonymous Mon 21 Jan 2019 06:05:52 No.10314399 Report

Quoted By:

>>10314151
Nigga what the fuck?????¿?¿ Algebra 2 and analysis on manifolds at the same time? What are you smoking?

Anonymous

Anonymous Mon 21 Jan 2019 06:57:22 No.10314501 Report

Quoted By:

>>10314358
In what way?

Anonymous

Anonymous Mon 21 Jan 2019 08:06:27 No.10314577 Report

Quoted By:

>>10314151
>Analysis on Manifolds
>ODEs
>Applied Complex

Why are you taking ODEs so late?

Anonymous

Anonymous Mon 21 Jan 2019 21:58:51 No.10316223 Report

Quoted By:

>>10311650
Pretty cool to see you guys are helping:)

Anonymous

Anonymous Mon 21 Jan 2019 22:01:03 No.10316229 Report

Quoted By:

>>10314089
Lang is actually a meme. Nobody uses his books for anything more than a reference text

Anonymous

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Anonymous Mon 21 Jan 2019 22:17:10 No.10316283 Report

Quoted By:

>mfw stupid as fuck with math
>mfw i see this thread

Anonymous

Anonymous Mon 21 Jan 2019 22:21:59 No.10316304 Report

Quoted By: >>10316532

dx/dy doesn’t literallly mean d times x divided by d times y, it is just a shorthand way of describing the derivative of x in relation to y.
WTF I NEED A QUICK RUNDOWN ON DERIVATIVES WTF ARE THEY???

Anonymous

Anonymous Mon 21 Jan 2019 23:38:48 No.10316532 Report

Quoted By: >>10320312

>>10316304
Derivatives describe the rate that things change. If you have a job account and you get paid $1,000 twice a month, then your bank balance will look like:

time passed | bank balance
0.0 months | $0
0.5 months | $1,000
1.0 months | $2,000
1.5 months | $3,000
2.0 months | $4,000

etc. You can make up an equation for your balance:
$\text{balance} = \text{month}\times (\text{\$}1,000 \times 2)$
If you want to find out how much your balance will change every month, take the derivative:
$\frac{\text{d}(\text{balance})}{\text{d}(\text{month})} = \text{\$}1,000 \times 2$

Anonymous

Anonymous Mon 21 Jan 2019 23:41:07 No.10316535 Report

Quoted By:

How are all numbers equally close to infinity?

Anonymous

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Anonymous Tue 22 Jan 2019 00:16:57 No.10316625 Report

Quoted By: >>10317720 >>10317845

>>10314358
I know that shitty school feel.
>be me in 6th grade
>doing well in all of my classes
>math teacher recommends I skip pre-algebra and go straight to algebra because of my performance
>okay sure
>enter 7th grade
>algebra kicks my ass and I'm completely lost
>parents send me to Sylvan for tutoring, it doesn't help

I had always loved school until this happened and I never recovered. I'm terrible at math to this day.

Anonymous

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Anonymous Tue 22 Jan 2019 00:19:59 No.10316637 Report

Quoted By: >>10317238

I'm having trouble with this one. So the problem says $x+1=2$ . But what is $X$ ?

Anonymous

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Anonymous Tue 22 Jan 2019 04:52:11 No.10317238 Report

Quoted By:

>>10316637
X = capital 1

Anonymous

Anonymous Tue 22 Jan 2019 10:05:11 No.10317703 Report

Quoted By:

>>10311867
Don't let anyone in /sci/ talk down to you. Using your brain is always good, especially if you do it purposely and willingly.

Anonymous

Anonymous Tue 22 Jan 2019 10:09:32 No.10317709 Report

Quoted By:

>>10311880
You're looking for
Polynomial division or Horner's method

The former is slightly easier to understand, as it is mostly long division. The latter is much faster but requires the understanding of the former to do it properly.

Anonymous

Anonymous Tue 22 Jan 2019 10:12:16 No.10317712 Report

Quoted By:

>>10313617
Just google stuff like
"Topic exercises PDF" or something similar. Usually gets you downloadable exercises en masse, especially in math.

Also helps you learn the correct subtopic names.

Anonymous

Anonymous Tue 22 Jan 2019 10:15:44 No.10317717 Report

Quoted By:

>>10313812
Fiction writing is important for developing creativity, something that most pure scientists lack and this board lacks entirely.

Read up on the great physicists and mathematicians. They all read extremely muh high literature.

Anonymous

Anonymous Tue 22 Jan 2019 10:18:14 No.10317718 Report

Quoted By:

>>10314355
Figured I'd comment, since I just drew a comparison. There's a notation of math/programming0 called prefix notation, it's one way of organizing the math (operations always come first. Language isn't that consistent, but we can start parsing the sentence that way, since an "operation" came first

In a "Lisp-like" language:
>The quotient of three times the difference of ten and two divided by their sum
>the quotient of
( /
>three times
(* 3
>the difference of
>( -
>10 and 2
>( - 10 2)
>divided by their sum
>(/ <the preceding stuff stuff> (sum))
>(/ (* 3 (- 10 2)) (+ 10 2))
>(/ (* 3 8) 12)
>(/ 24 12)
>2
Honestly 091-101 math is usually awful in how they teach it. I'll keep the the thread open to see if I get a (you) because I tutored professionally for years and I like to do it.

Anonymous

Anonymous Tue 22 Jan 2019 10:19:07 No.10317720 Report

Quoted By:

>>10316625
I hate this. No one should skip classes, it fucks with childrens' social development, especially if done in elementary school.
Just separate the smarter kids into a special course where they get additional material for that particular subject. They might still suck at other subjects.

Anonymous

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Anonymous Tue 22 Jan 2019 10:25:36 No.10317731 Report

Quoted By:

>>10313743
Pre-Calc and below are shitly taught. Pre-Calc is seriously the worst math ever. Why would anyone need to be able to expand cos(8x) or other shit 10x in a row. I got to skip it in high school, never suffered for it, and I think anyone who takes it becomes worse at math, it's that bad of a course. Remedial math is about as bad as pre-calc, but I think a little less because it's just more poorly taught, versus pre-calc which is brain damaging. Calc I and beyond are piss easy in comparison.
>Japanese raised kid bitching about the "self-taught" software system we had
>it was actually awful but he's just bad at math
>we did this in fourth grade!
>then you should be better at it

Anonymous

Anonymous Tue 22 Jan 2019 11:31:35 No.10317791 Report

Quoted By:

>>10313617
this is a year 11 maths B text book I used through highschool.

http://pdfs.jacplus.com.au/secure/resources/0731408101/PDF/Book/MQB_Yr11_Qld2e_TI_v3_Book.pdf

hope it helps

Anonymous

Anonymous Tue 22 Jan 2019 11:54:55 No.10317815 Report

Quoted By:

>>10313617
Just kahn academy your way to pde's and take it from there.

Anonymous

Anonymous Tue 22 Jan 2019 12:22:52 No.10317845 Report

Quoted By:

>>10316625
Had an algebra teacher who died and then had a different substitute every day, sometimes nobody showed up. My class was also full of degenerates. I passed but didn't learn shit, now I'm teaching myself.

Anonymous

Anonymous Tue 22 Jan 2019 13:36:52 No.10317935 Report

Quoted By:

>>10311732
bracket whore

Anonymous

Anonymous Wed 23 Jan 2019 02:00:33 No.10319329 Report

Quoted By:

so this is the power of

Tuba Jam

Tuba Jam Wed 23 Jan 2019 02:33:06 No.10319403 Report

Quoted By: >>10320130

>>10311880
sometimes you can group them.
Let's say you have y=6x^3+3x^2+16x+8
you can group them: (6x^3+3x^2)+(16x+8)
and factor out a common factor: 3x^2(2x+1)+8(2x+1)
and regroup: (3x^2+8)*(2x+1)
set both sides to zero and you know the rest
also if there is no constant then you can factor out the x and get a regular quadratic.

This works in such a vanishingly small number of cases that it doesn't really matter. I would recommend moving on as long as you can do the factoring.

Anonymous

Anonymous Wed 23 Jan 2019 06:38:32 No.10319862 Report

Quoted By:

>>10314096
thank you

Anonymous

Anonymous Wed 23 Jan 2019 10:50:59 No.10320130 Report

Quoted By:

>>10319403
thanks legend!

Anonymous

Anonymous Wed 23 Jan 2019 13:27:12 No.10320312 Report

Quoted By: >>10320437

>>10316532
What does the d mean tho???

Inb4 cock

Anonymous

Anonymous Wed 23 Jan 2019 14:41:40 No.10320437 Report

Quoted By: >>10320466

>>10320312
$\text{d}$ represents a really small change, similar to when you use $\Delta$ . Taking a derivative is like a "more accurate" version of doing this:
$\frac { \Delta ( \text {balance} ) } { \Delta ( \text {month} ) } = \frac{(\$ 2,000)-(\$ 0)}{(1~\text{month})-(0~\text{months})} = \$ 2,000/\text{month}$

Anonymous

Anonymous Wed 23 Jan 2019 15:02:12 No.10320466 Report

Quoted By: >>10320479

>>10320437
Are they saying d for delta or d for derivative?

Anonymous

Anonymous Wed 23 Jan 2019 15:07:27 No.10320479 Report

Quoted By:

>>10320466
d is derivative.

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