/sci/ - Science & Math

/Sci/ I come to you with a question. I hope it's relevant enough. Has anyone here in their undergraduate studies transferred from a community college to a four year school? I'm going there to save money, but I worry that when I eventually transfer, I'll be miles behind, Their science program is mediocre. I have to study a little bit, but not nearly what I expected.

Should I transfer out next year, or will I be fine with two years and a little hard work? If I stayed there then I would be much more likely to get an internship. Is it worth it? Sorry if this is the wrong place, I know it gets pretty angsty here sometimes.

Pic related: wildlife "science" will probably be my major

Help with babbys first relativity problem? I feel like an idiot for not getting this.

Larry is driving east at 40 km h−1
. His twin brother Harry is driving west at
30 km h−1
, toward Larry in an identical car on the same straight road. When they
are 42 km apart, Larry sends out a carrier pigeon, which flies at a constant speed
of 50 km h−1
. (All speeds are relative to the earth.) The pigeon flies to Harry,
becomes confused and immediately returns to Larry, becomes more confused, and
immediately flies back to Harry. This continues until the twins meet. Ignoring
turnaround time, how far did the pigeon fly?

I know you all hate homework threads but would someone mind helping me out?
I've started a dynamics course with absolutely no prior knowledge and the professor just glossed over all the 1D stuff.
I've had a go at the first 2 but got daft answers, seriously any help is appreciated.

A ball is thrown straight up from the edge of the roof of a building. A second ball is dropped
from the roof one second later. You may ignore air resistance.
(a) If the height of the building is 20 m , what must be the initial speed of the rst ball if both
hit the ground at the same time?
Consider the same situation, but now let the initial speed, v0, of the rst ball be given and
consider the height, h, of the building as the unknown.
(b) What must the height of the building be for both balls to reach the ground at the same
time for each of the following values of v0 , (i) 7.8 ms
1
; (ii) 9.0 ms
1
?
(c) If v0 is greater than some value vmax , a value of h does not exist that allows both balls to
hit the ground at the same time. Solve for vmax.
(d) If v0 is less than some value vmin, a value of h does not exist that allows both balls to hit
the ground at the same time. Solve for vmin.

3/3=1
1/3=.3333333...
2/3=.6666666...
3/3=.9999999...

So .9999999....= 1
There is no number between .99999999..... And 1.
1 doesn't exist.

What the fuck is this sorcery?

So today I offered to go with someone I owe money to go and get less then a mile away food since I still owe them money and wanted to pay with my credit card. To which they responded "so you're going to make me spend more on gas cool". My question is will a 178lb person really make that much of a difference for the amount of gas their car would consume?

hey /sci/, I'm stuck on a calculus problem.
I need to find the critical points of
f(x, y) = x^2 + y^2,

subject to the constraint: x^2 + 4y^2 = 1.

I have to use lagrange multipliers to solve it....

Can anyone help?

>>5056255
>thinking that a picture is related unless specified on /sci/
mfw

Can someone explain how to solve for p and q in this dimensional consistency problem even though its just algebra.

T=2PI*(L^p)*(g^q)

T=(L^p)*(L/T^2)^q

That's as far as I can go. I already know the answers are p=1/2 and q= -1/2, but I don't know how to algebraically solve for them. When I plug them in though I'm able to get T=T.

retard here.

I have to draw |z|^2+ Re z + 2 Im z +1 = 0

breaking z up into x and y we end up with x^4+2x^2y^2+y^4+x+2y+1=0

is there any way to draw this without computer help? if not, if I throw that exact shit into wolframalpha will I get the correct plot?

http://www.wolframalpha.com/input/?i=x^4%2B2x^2y^2%2By^4%2Bx%2B2y%2B1%3D0

sorry for the homework thread but i'm pretty confused. Things like circles are easy to visualize but i'm just not sure what to do with this other than throw it into matlab, etc.

Hey /sci/, quick algebraic question driving me nuts.

Let <span class="math"> \alpha \in G [/spoiler] and suppose that <span class="math"> \alpha^2 [/spoiler] is algebraic over F. Prove that <span class="math"> \alpha [/spoiler] is algebraic over F.

Probably really simple but comes at this topic from a different angle than I'm used to! thanks

/sci/, I can't into the twin paradox. Can someone link me to a better explanation than this? wwwdotbtinternetdotcomslash~j.doyleslashSRslashsr2dothtm

Hi /sci/

I'm just looking for neurologists browsing around these parts to confirm/deny/discuss an interesting theory I have on consciousness.

Basically, a high amount of focus and energy on a certain part of either reality or brain activity would cause a heightened consciousness on said subject. For example, noticing a falling cup you previously haven't been aware of mid flight, or the cup shattering and your attention diverts to said cup.

What I think happens here is that in example 1 you were previously aware of said cup or maybe aware of the motion of the cup falling, and when it took action with a predicable and noticeable outcome (shattering) your brain has to focus (I assume) to prevent shock.

Respond if this is already known among neurosci's, or if you're interested. Have a good day.

Would the universe exist if there was nothing to observe it?

A boy is half as old as the girl will be when the boy’s age is twice the sum of their ages when the boy was the girl’s age.How many times older than the girl is the boy at their present age?

I think it'd be a very good idea to DDoS nasa when the time is nigh. Do it.

Any economics students familiar with CCA and UCC want to make like 30 bucks for tutoring for like 30 minutes? I have an exam on monday and there are a few discprencies between his notes and the textbook.

post email if interested

>>4893864
sage this shit, why the fuck are you guys replying
>getting trolled on /sci/
>2012

Let's say you read a 100 page book (just for simplicity's sake) about something you know nothing about.

After reading it without taking aderrall, how much (in%) would you recall after a day?
Now the same question, but with taking aderrall.(assuming you know nothing about it yet again)

If you've used it before, I'd like to hear your opinion.

i remember a time ago i saw Cal Newport's books, "How To Become a Straight-A Student" & "How to Win at College", here, a mediafire link, can some post a working link with those books pls?
And/or can you guys recommend a couple of books similar to those i just mentioned ? thanks guys.

well here is what the input should do and i cant set up the counters


Given a file of text, assume that
a "word" is 1 or more consecutive, non-whitespace characters
a "sentence" is a series of words terminated by either a period, exclamation point, or question mark
Design a C++ program (using functions/passing parameters) that will

interactively prompt for and read the name of an input file
interactively prompt for and read a string to search for
open the input file (using an input filestream variable) and with one pass through the file
count the number of "words" in the file
for each word, make sure all letters, except the first, are lower case - leave the first character unchanged
count the number of "sentences" in the file
count the number of letters in the file (A-Z,a-z)
count the number of consonants in the file (consonants are letters that are not vowels - the vowels are: a, e, i, o, u, A, E, I, O, and U)
count the number of nonwhitespace characters in the file that are NOT letters
count the number of times the search string is found in the file (must be an exact match) - search for matches AFTER upper case letters have been coverted to lower case

all my counters end up being wrong, i know how to open the input file and all that, i just need to call up the counters :/

Hey guys i am interested in knowing how the human brain works. Specifically the way the brain reacts to what i sees and hears, and how it is able to use this information to control actions. Thanks /sci/

>>4801022
thank you anon

Challenge to /sci/: find the gradient of a general parabola without using differentiation.

does /sci/ know of any place online i can get adderal, ritalin, vyvanse or the like. legality isn't an issue