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Alchemist
3 Coulombs

Registered: Apr 2002
Location: In your dreams
Posts: 3770
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Formulas

I have an Idea, we can post up Formulas that may be useful here.


Just say what course it's for and post it. I'll then add it to this post on the top. This should make life easier for people who don't know or forgot the formula for a thingy.

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Old Post 10-04-2002 11:28 PM
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micron
all i need is a miracle

Registered: Mar 2002
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unstickifying.
theres literally thousands of formulas to memorize for all the different classes (geometry, algebra, precalc, calc, linear, chem, physics...). to have one generic post-all-your-formulas thread would be ineffective.

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Old Post 10-09-2002 12:00 AM
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iLLmaTiC_aNgeL
-huney B-

Registered: Aug 2002
Location: illest city : nyc
Posts: 461
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forumula for finding the surface area of a sphere :
4(pi)(r)squared (i wish i had the correct font to type it out!)

volume of a sphere = 4(pi)(r)cubed divided by 3

eh this is too hard..so i'll jus stop here

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Old Post 10-13-2002 01:01 AM
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PsychoSnowman
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Registered: Mar 2002
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here is a practical one everyone has to use, so if you forget it sometime, just come back here!:

X = -b + or - (Sqrroot(b^2-4ac))/2a

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Old Post 10-13-2002 01:38 AM
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ajy
Senior Member

Registered: Jul 2002
Location:
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formula for finding exactly where on earth fudga is:

C/S PO/C
-------------- x -----------
3BO=GA DHP

cheese sandwich
over three bottles of ginger ale

times

penguins on crackers
over dumb homeless person

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Old Post 10-13-2002 01:49 AM
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Alchemist
3 Coulombs

Registered: Apr 2002
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For AP Chem, Anything to do with Thermochemistry is generally fixing up the problem then multiply everything by everything, or sum of products minus the sum or reactants.





Hell yeah I got a fifty-something on that test. (2 classes in our school, 2 ppl pass this test in our class, everyone passed in other class(in prev. tests, our class goes at a rate 10x faster))



quote:
Originally posted by PsychoSnowman
here is a practical one everyone has to use, so if you forget it sometime, just come back here!:

X = -b + or - (Sqrroot(b^2-4ac))/2a



There's a song to help people remember this.

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Old Post 10-18-2002 04:17 AM
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PsychoSnowman
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hah, how's the song go? i never heard of it.

-edit- alchemist, go read my theories in my subprofile on AIM. It's back up again. sn: VaprSnake21.

__________________
Long messages do not equal aggravation of any sort,
rather they reflect nothing more than a response of insight
that should always be read in a matter-of-fact tone.

"Those womyn that seek equality with men, lack determination."

"I beseech you, in the bowels of Christ, think it possible you may be wrong."
-Cromwell

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Old Post 10-18-2002 05:31 AM
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Alchemist
3 Coulombs

Registered: Apr 2002
Location: In your dreams
Posts: 3770
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Basically say the quadratic formula to the tune of "Pop goes the weasel"

I was reading your profile's philosophy on political correctness when all of a sudden you signed off aim. :sleep:

Isn't it wierd how multiple people can individually come up with the same thing? There I was thinking "Is human instinct suicidal or something? Why are people offended by things that make perfect sense?" Then you come along thinking "political correctness is gonna screw us over" It's so cool.

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Old Post 10-18-2002 05:55 AM
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PsychoSnowman
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Registered: Mar 2002
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hah, sorry bout signing off . i'm online most of the day cause i just leave it on though, so ample opportunity heh.

It is odd that different people can come up with the exact same idea. I thought up that morpheus method theory i wrote, and then i find out that numerous other people have all ready written stuff strikingly similar to it. It's self-defeating (in that others have all ready thought of it) and reaffirming at the same time though, heh..sweet

__________________
Long messages do not equal aggravation of any sort,
rather they reflect nothing more than a response of insight
that should always be read in a matter-of-fact tone.

"Those womyn that seek equality with men, lack determination."

"I beseech you, in the bowels of Christ, think it possible you may be wrong."
-Cromwell

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Old Post 10-18-2002 07:04 AM
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Crazydeb8ter
administrator

Registered: Apr 2002
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quotient rule for derivitives:

g(x)/h(x)= (h(x)g'(x) - g(x)h'(x)) / h(x)^2

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"The weight of this sad time we must obey,/ Speak what we feel, not what we ought to say./ The oldest hath borne most; we that are young/ Shall never see so much, nor live so long."
King Lear (V.3.300-304)

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Old Post 10-18-2002 07:37 AM
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DaWhim
Da Hong Konger

Registered: Oct 2002
Location: New York City
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DMV!!!
Department of motor vichel
nope....

Density = mass/volume

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Old Post 10-18-2002 06:12 PM
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az0nd2r3
Senior Member

Registered: Mar 2002
Location: md
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dang.....to post up formulas u must be freakin bored....lyke i am rite now.....soooo...to help me remember my calc....sum derivative rules...
sin u = cos u * du/dx
cos u = -sin u *du/dx
tan u = (sec u)^2 * du/dx
sec u = sec u * tan u * du/dx
csc u = -csc u * cot u * du/dx
cot u = -(csc u)^2 * du/dx

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...

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Old Post 10-18-2002 07:46 PM
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Drunken Master
Umm... Yeah...

Registered: Mar 2002
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Posts: 273
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Ooooo... forumlas.. i got some up my sleeve... hehe

let see... matrix formula... Ax =b
Ohm's Law: V=IR
Power= P=IV=I^2R=V^2/R
PV=nRT

that's all i can think of so far... oh yeah.. one for unit vectors
u =(xi +yj +zk)/sqrt(x^2+y^2+z^2)

Last edited by Drunken Master on 10-19-2002 at 05:14 PM

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Old Post 10-19-2002 05:11 PM
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XxAzNViPeRBoIxX
:GeNeRaShUn:

Registered: Oct 2002
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pre al * sigh *

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Old Post 10-21-2002 01:01 AM
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ajy
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you guys know you liked my forumla

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Old Post 11-09-2002 04:12 AM
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requiem
Book Mod/Batman Fan

Registered: Nov 2002
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delta ANYTHING = ANYTHING final - ANYTHING initial

Sum of the forces = (mass)(acceleration)
d(ln x) = 1/x
d(e^x) = e^x
sin(45 degrees) = sqrt(2)/2
sin(30 degrees) = 1/2
cos(60 degrees) = 1/2
cos(30 degrees) = sqrt(3)/2

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Old Post 11-22-2002 01:54 AM
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Alchemist
3 Coulombs

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quote:
Originally posted by requiem

Sum of the forces = (mass)(acceleration)



Why is it a sum and not a product?

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Old Post 11-25-2002 04:06 AM
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PsychoSnowman
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quote:
Originally posted by Alchemist


Why is it a sum and not a product?



the sum of all forces will always equal mass * acceleration. It's not saying that mass * acceleration is a sum. It's saying that if you have forces, F1, F2 etc., then:


F1 + F2 = mass *acceleration

it's like saying, this is a terrible example i apologize but it works,

3 + 5 = 2 * 4

8 = 2 * 4

haha, there it is. Thank you hehe Hope that helped.

__________________
Long messages do not equal aggravation of any sort,
rather they reflect nothing more than a response of insight
that should always be read in a matter-of-fact tone.

"Those womyn that seek equality with men, lack determination."

"I beseech you, in the bowels of Christ, think it possible you may be wrong."
-Cromwell

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Old Post 11-25-2002 04:22 AM
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Alchemist
3 Coulombs

Registered: Apr 2002
Location: In your dreams
Posts: 3770
Status: Offline

quote:
Originally posted by PsychoSnowman


the sum of all forces will always equal mass * acceleration. It's not saying that mass * acceleration is a sum. It's saying that if you have forces, F1, F2 etc., then:


F1 + F2 = mass *acceleration

it's like saying, this is a terrible example i apologize but it works,

3 + 5 = 2 * 4

8 = 2 * 4

haha, there it is. Thank you hehe Hope that helped.



Ok thanks.

I should remember to check the entire area upon entering a room I have never been in before. I forgot it this time sorry.

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Old Post 11-25-2002 04:59 AM
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Jesus
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quote:
Originally posted by PsychoSnowman


the sum of all forces will always equal mass * acceleration. It's not saying that mass * acceleration is a sum. It's saying that if you have forces, F1, F2 etc., then:


F1 + F2 = mass *acceleration

it's like saying, this is a terrible example i apologize but it works,

3 + 5 = 2 * 4

8 = 2 * 4

haha, there it is. Thank you hehe Hope that helped.



You're so cool!

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Old Post 12-02-2002 02:29 PM
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