Formulas Definition and 522 Threads

i'm working on a multi-year project with my college's chapter of ASME and we're having a little difficulties finding the formulas that we need i found the formula to determine the force in Newtons being exerted by a magnetic field in Newtons, but I am having a lil difficulty with the formula...

[FONT="Times New Roman"]I have a few questions concerning the Doppler Effect, I know what it is in terms of a moving object, and how speed effects fequency etc. but I'm more interested in the explantions. My actual knowledge of the two explanations is reasonably vague. The one I am interested...

Homework Statement I need to evaluate the definite integral of (x+2(1-x^2)^(1/2))dx from x=0 to x=1 using geometry formulas. Homework Equations None known. The Attempt at a Solution I'm actually trying to help one of my friends in AP Calculus with this problem. I know how to...

I don't really have a book to go by, and am going through examples online. I'm finding that there are certain helpful formulas. Does anyone know of a collection of formulas that I can use. For example, the difference of cubes: A^3 - B^3 = (A - B) (A^2 + AB + B^2) It would be handy to...

I hope this is in the right place. I'm in grade 12, and I've been given an assignment involving complex numbers. The question reads: Use De Moivre's Theorum to verify the identities: cos(2\theta) = cos^2\theta - sin^2\theta sin(2\theta) = 2sin\theta cos\theta I've tried something like this...

Homework Statement Prove that: tan (a - b) = tana - tanb 1 + tanatanb] Homework Equations cos (a- b) = cosacosb + sinasinb sin (a - b) = sinacosb - cosasinb The Attempt at a Solution I have plugged in the two...

Homework Statement I am trying to find a balanced equation for Propanol, and in addition - what is the Kcal/gram of Protonal Homework Equations I think I'm starting with CH3 CH2 CH2 OH (left side) and CO2 H20 (right side) The Attempt at a Solution CH3CH2CH2 OH to 6CO2 2H20...

Ok this is a veryyyyyyyy simple question. d= vt + at^2/2 (motion equation) I want to find a (acceleration) 2d -vt/t^2 = a is this the right way?

Does anyone else ever get troubled by that vast array of mathematical formulas one has to apparently memorize to be successful in mathematics?

Hi all, i hope that i am in the right forum. As you see in my topic i have a problem with Roark's formula especially for elastic stability of plates and shells. The formula i got a problem with is the following: If you have the book: sixth edition: page 689 table 35 formula 15. or...

i am so lost in this area and have huge test coming up on tuesday and we don't have books for this unit either so i can't study or look at examples for that i was wondering if you guys could find me website(s) which shows how to solve equations like these: find exact values: sin 67.5...

I have both a HP-50g and a TI-89T so let's not get into the debate of which is better... I am basically trying to find the most efficient way to enter a bunch of formulas that I use over and over into either calculator. I would prefer some type of app where I can enter the formulas on a...

I have no idea if this is the right forum but I am doing the kinematics chapter in 2204 and I was wondering if anyone had the bassic forumlas for motion.

Homework Statement (1) (1+cosx)/(sinx)= cot (x/2) (2) 2 csc 2x= sec x csc x (3) cos^6 x- sin^6 x= cos 2x(1 - 1/4sin^2 2x) ( I think this has to do something with subtracting -3a^2b^2, since I need to get a-2ab+b to factor it..?) Homework Equations Addition and Subtraction...

[SOLVED] Trig Identities and Double Angle Formulas Homework Statement If tan(a) = 1/5 and tan(b) = 1/239, find tan(4a - b) Homework Equations tan2x = 2tanx/1-tan^2x tan(x-y) = tanx - tany/ 1 +tanx tany The Attempt at a Solution tan (4a - b) = (tan4a - tanb)/(1 + tan4a tanb)...

[SOLVED] Finding sine and cosine formulas Homework Statement If sinx/siny = 1/2 and cosx/cosy = 3 prove: sin (x + y) = 7/3 sinx cosx Homework Equations sin (x + y) = sinx cosy = cosx siny The Attempt at a Solution Can someone please give me a hint so that I can start? Thanks.

Hello, I am EXTREMELY glad I found this forum. I used a chemistry calculator that was posted by a poster here in a signature (BATE calculator from ChemBuddy) and it gave me an instant result to a problem I was trying to solve for a while, and that I should have been able to do on my own. I was...

# Hi # My instructor of EM course wrote two formulas on the blackboard and asked whether they are correct and what their names are. (He does not know the answers too) # These formulas give V and \vec{A}, given \vec{E} and \vec{B} V(\vec{r},t) = - \vec{r} \cdot \int_{0}^{1} d\lambda...

Homework Statement : #1. You are walking on a perfectly round asteroidwith a diameter of 40km and a mass of 10 to the 16th kg. your mass is 60kg. how much will you weigh, in Newtons? #2 a 100 kg porshe is moving at a steady speed around a cicular track waith a 1000 m radius. The porshe's...

Homework Statement A circular curve of radius R in a new highway is designed so that a car traveling at speed v can negotiate the turn safely on glare ice (zero friction). If a car travels too slowly, then it will slip toward the center of the circle. If it travels too fast, then it will...

Homework Statement Give the formula of a fluoride molecule that: is octahedral in shape is trigonal bypyramidal in shape is T-shaped ...etc The Attempt at a Solution Ok, I'm not really actually looking for an answer, because I already know the answers are SF6, PF5, and ClF3. And I have...

Homework Statement Someone I am stuck and need help solving a questions in formulas for x-rays. Converting 300 ma, .016 14cam 94kvp and a 6:1 grid to 18cm and T.T Homework Equations The Attempt at a Solution

In my book, we were give: int of tanx dx = - ln|cos x| + c and later I cam across: int of tanx dx = ln |sec x| + c --should I use these interchangeably or what?

Homework Statement How much weight would 5g of CuSO4 5H2O lose if ti were dried at 120 degrees C for 12 hours (i.e. if it were heated to drive off all the water of hydration)? The Attempt at a Solution CuSO4 = 159.61 g/mol H2O = 18 g/mol = 90 g for 5 mols 159.61/(159.61 + 90) =...

I'm not quite familiar in QM. All I can see are formulas, I'm familiar with diff.calc., integral, & diff.equations. Do most QM formulas use these methods in deriving their formulas? if not, what else?

I think I found a simple formula if I was putting in the same amount of money each year, but what if I wanted to start with 1000$, add 10k$ for 10 years, and then watch it compound at X interest; how would i set that up? And if you know, can you put this formula into Excell.

"A compound contains only carbon, hydrogen, and oxygen. Combustion of 10.68 mg of the compound yields 16.01 mg CO2 and 4.37 mg H2O. The molar mass of the compound is 176.1 g/mol. What are the empirical and molecular formulas of the compound." I saw an earlier post but it wasn't solved yet...

Ok I am a high school freshman and haven't actually studied physics yet, but I'm trying to learn the formulas needed for a project I'm working on. ( I didn't know if this should go here or in the homework section, since it isn't really for a school assignment, but please move it if it belongs...

Formulas for acoustical dampening? Hello, A number of years back I worked at an engineering company where we needed to isolate very large, very loud motors from transmitting sound energy into the supporting structure. We did this with a series of elastic isolators that supported the motors...

Hi! How can i write chemistry formulas in LaTeX ? Such as: MgC_12 etc... It does not look good if it is done in math-environment...:rolleyes:

Name the following :ZnI2, BrF, FeSO3, CaH2, BaHPO3,CuNO3, AgIO, SO2 write the correct formula of these: zinc sulphate, barium nitrate, gold(III)nitrate, barium chloride, mercurous nitrate, antimony(V)cloride, ferrous bromide, calcium carbonate and hydrobromic acid. i have attempted them...

Is there a kosher way of manipulating formulas containing floor truncation, say, \sum_{i=1}^n \left [ ~ { 333 \over 2^i } ~ \right ] ~=~ ? (I mean analytically, not writing a computer program to find out the result.) Thanks.

Given: Draw structural formulas for all the alcohols that have the molecular formula C5H11OH. Name each one and classify them as primary, secondary, or tertiary alcohols. Describe how they are formed and give two uses for this type of alcohol. Solution: I am still at the naming portion but...

What is the difference between formulas E=p^2/2m and E= hf ?

Hi, does it exist a program where you can write in mathematical formulas, draw geometrical figures and create graphs and functions easily?

Hi all Looking for simple formulas to describe maximum acceleration of steel tubes when tubes are compressed and suddenly released when submerged in water (dont know if the water does anything else than supply buoyancy). Please, also feel free to comment freely on the topic and formulas...

Help! How do i rearrange this equation to make x the subject? y=xsquared

The Problem; Given H = U + PV and dU = TdS - PdV Find dH in terms of T, S, P, V My Solution; H = U + PV dH = dU + PdV + VdP dH = (TdS - PdV) + PdV + VdP dH = Tds + VdP My Question Am I missing a step between the first and second steps? I'm taking the derivative of both sides...

Sorry to bother you all with a trivial question. I'm a Belgian teacher and I'm struggling because I don't know how to read a formula in English. How do you pronounce the apostrophe in for example v'. In French we say 'prime'Can anyone help?

It's a previous exam question using compound angle forumlas. I've tried everything to try and get the answer involving rearrangments! I know the forumlas i just can't get them to work to show this. I assume its something to do with adding or subtracting the forumla away from each other...

I was bored so I make fun with derivations of SI units of many Physics formulas. Note, this should just be called "introductory physics", that means NO calculus (but rate of change designated by the delta symbol) and motion is in one or two directions only. This is high school physics level in...

I am a 2nd year student at an engineering school. I searched google and other sources to try to find anything and everything on electrical engineering. I found only a few good sites, though. So I was wondering if anyone could please give me a useful site or two. : ) Of course I am looking for...

I recently made several comments about the sole use of formulas when a logical approach would be as effective. https://www.physicsforums.com/showthread.php?t=150999 I am a high school senior taking AP physics C. Last year I took a more basic course, and in both of these classes (more so...

How do you rearrange a formula to isolate a particlur variable.

Homework Statement What is the likely formula for CH3NH? Homework Equations We need to find the value of ? in order to have 8 valence electrons on the outer shell of the compound. The Attempt at a Solution I could do less "complex" ones, such as GeCl? Ge has 4 valence elctrons...

One of my homework questions asks to give the formula for the compound mercuric carbide. I'm pretty sure that the symbol for mercuric is Hg^2 and the symbol for carbide is C_{2}, so does this make the formula Hg^2C_{2}?? Or is it more complicated than that?

Hey, Does anyone know a good program (similar to word) that can be used to write mathematical formulas? It kind of sucks to write them in word as it is very limited. Lol preferably a freeware.

Can you tell me the 3 basic formulas? I forgot them. The ones with V= Vi-Vf= D=

Today I was watching my sister do her Financial homework and I tryed to do one of them problems it said something about haveing 5000 bucks at 9% interest for 6 years and you had to find how much you would have. And so I tryed to use the compound interest formula P=A(1+(r/n)^rt but we both got...

We lit a piece of Mg so the formula is: 2Mg(s) + O2(g) HEAT-- 2MgO(s) We then dissolved this in water so it would then be: MgO(s) + H2O(l) -- Mg(OH)2(l) Next we blew into water which is: CO2(g) + H2O(l) -- H2CO3(l) Is this all correct? Should I have (Aq) after the H2CO3?