Tips — 395 discussions

I have an exam today, a final exam. Usually I don't ask this, but its an physics exam so I will need as much as help I could said. With that said, I was wondering if you had any specific tips on taking a physics exam? Like how to dissect a problem.

Hey everyone, I'm in my final year in high school right now and I always seem to be stressed about physics. My other classes are fine with high 80's/90's, but with physics, I always seem to be in my low 70's o.o. I'm just wondering if some people have experienced this problem before and how did...

I find it rather tedious to calculate the eigenvalues of a 3x3 matrix. For example The \emph{characteristic polynomial} $\chi(\lambda)$ of the 3$3 \times 3$~matrix \[ \left( \begin{array}{ccc} 1 & -1 & -1 \\ -1 & 1 & -1 \\ -1 & -1 & 1 \end{array} \right)\] is given by the formula \[...

I'm trying to find the equivalent resistance for this circuit IIRC, it's a resistor ladder. I think I've seen this solved by working backwards, but I can't for the life of me remember how to do it now. I've tried rewriting the network in other ways to expose any series/parallel/voltage...

There was great input on Studying smarter, thanks everyone. Now when it comes to test taking itself are there any suggestions? All relevant input welcome.

Looking forward to going back to school and get that degree thingey over with. Will be using the summer on brushing up the old math skills. Anyone got a good recommendation for a calculus textbook that can jog my memory and bring me back up to entry level university speed? Thanks in advance!

I have to connect very thin wires d<40\mathrm{\mu m} of different metals multiple times to make a thermopile. Due to the geometry, the cost of the wire and personal nerves I do not have too many tries. The wires are insulated, and in the end the whole thermopile should also be electrically...

Hi, I am taking an electrodynamics course. The textbook we are ussing is Introduction to electrodynamics by Griffiths. We are taking it from chapter 8. I am having an extremely hard time in learning it. Can somebody recommend me a few good books, webpages to learn? Also any tips on how to...

Homework Statement So this Monday I will have a test, and I know for a fact that one of the free response questions will be a circuit with a combination of series and parallel resistors.So my question is can you guys give me some tips on how to do these successfully. I know that I need to...

I'm a first year engineering student in a Finnish University. I'm majoring in electronics, more specifically microchip and microprocessor design, and was thinkin to take my minor from something completely different area like economics. Currently I'm only aiming for masters degree. I know this...

Hexagonal ice?? Has anyone ever modeled hexagonal ice Ih using c++ before?? Or has anyone got any tips on how to visualize the structure?

I just downloaded this version, but the navigation bar on the right hand side does not show up, it flashes on for a split second then vamooses, hovering over it don't bring it back, is there some trick to get back?

Is there anyone who can help in anyway to study for the Praxis II Physics Content area. I have taken it and just need a little help on what is the best way to study and prepare for this test. Any help would be greatly apprecited.

Homework Statement Newspaper Boat- So I have been thinking about designing a newspaper boat out of pure entertainment. I want to build a boat out of shellack, tape, and newspaper, to maximize speed (to race people in swimming pools). considering i have some amount of these supplies, what...

Sometimes solving a circuit by KVL and KCL can be a little difficult. What tips/tricks have you gained from solving such circuits? i know that little tricks won't be as helpful as actually practicing, but they will help nonetheless. for example today i discovered it is not a very good idea to...

Astronomy for AS extended project need help! + tips! Hi i want know what sort of things can i include for a basic level astronomy. Despite doing physics I need some tips which i could include I am currently at college i will update it soon in more detail thanks

Homework Statement For whatever reason, I'm having issues integrating sin2(x) Homework Equations I can use U-sub, trig-sub, integration by parts, partial fractions, in any combination as needed The Attempt at a Solution My brain is failing me, so any hints would be awesome.

I have a problem in balancing the equation can anyone give some tips in balancing them.

Hey, I need to design somethign that rotates the holder drawn below, to a full 180 degrees and stops. And should be able to repeat that process as required. It should be also precise, that is, stop at the same place each time. Any ideas on how to implement this? needs to be cheap and...

Hey, For most of us undergraduates, it's that time to start a new semester of school. I was just curious as to what "rituals" you may have found successful in preparing yourself for a new term. Anything related to organizing yourself, overviewing the material in any particular way, talking to...

I'm currently in the process of searching for and applying to various REU’s and I would like to know if any PF members have participated in a great program and would recommend that I take a look at it. I have searched through the NSF database so I have a good idea of what's out there, I'm just...

I'm currently a freshman physics major at UIUC. I really want to do engineering so I'm thinking of doing a double major in Physics/Engineering (some sort). Due to an a lot of AP credit, I'm all finished with my general education requirements, leaving only math, physics, and engineering classes...

Hi, Can anybody help with this question? I have attached a scan rather than type it all out. Any tips would be appreciated as I'm unsure how to start it. Thanks

Hey, does anyone know much about knot invariants and the stuff? Including Fox Calculus, Alexander Polynomials, Reidemeister theory? Any helpful sites? Tips for learning about this subject? Also, what are quandles and how are they related? Thanks!

To prepare for the worst economic recession in 30 years, one should be learning how to cook, practicing your best pick up lines, ( 2 can eat as cheaply as 1), refrain from getting Disney mania, and avoid beds with electrical activity, ( one needs a good nights sleep for productivity), watch out...

I really need some tips on taylor series...Im trying to learn it myself but i couldn't understand what's on the book... Can anyone who has learned this give me some tips...like what's the difference between it and power series (i know it's one kind of power series), why people develop it, and...

Well I figure since the market is going to hell and a lot of stock are dropping in price across the board, this would probably be a good time to invest. But i am a noob concerning the stock market and was wondering if anyone would care to share their knowledge/tips on how to take advantage of...

Homework Statement (note: this is not an easy question and will be marked very strictly.) Find the values of the constant a and b such that limx->0 ((ax+b)^1/3)-2)/x = 5/12 NOTE: you are not allowed to use L'Hospital's Rules for this question Homework Equations whatever you learned...

Question about how to study physics; general question all input is allowed:)THANKS Ok so I am a EEN major and while I know there are others with a lot harder course load I am taking...Vector Cal(252). university physics 2(242). arabic 2(112), and busniess course(business magt. is my...

yes, i just got a nice new macbook pro... how do i get all my music, important files, pics, etc from my pc to my mac?! lol sorry i came here to ask but any info would be great !

I could have posted this in design/systems engineering but thought I'd reach more user's this way. How could I get better with hardware? Should I be building kits, taking existing devices apart, living on www.sparkfun.com ? I wish I could be at the stage that I can take any idea and be able...

How to do bold letters and larger font with certain words in Latex?

So I'm beginning college in the Fall. Considering I'm going to be a Biochemistry major, does anyone have any advice as how to survive Gen Bio? I hear it's a big weed out class for the Pre Med kids. I'm also taking Gen Chem and Calc I, both which I feel confident in, since I've studied it by...

Hey!, I'm starting university soon and there we have to use a little Matlab. I have never programmed before, so I was wondering if you guys knew of any good texts for a beginner?

Hi, I have just started to look into PIC ALP coding. i am also fortunate to work on one the PIC controllers, though i am responsible for hardware design only, i want to develop some firmware knowledge. If such a question has been answered previously please give me the link, or your precious...

There's already a thread on conventional (terrestrial/earthen) gardens, so I thought I'd start on water gardens. I was visiting a local nursery last week, and they have a really water garden set up (about 2 m x 3-4 m) in the shape of an irregular oval. Anyway, some members have posted...

Hi, As you know , PCB design tools have manuals accompanying them ,but there are points in designing that a PCB designer earns by long time experiment.Now,are there any places on the web telling us these special points or tricks?

Hi everyone, I usually see people asking for self-study tips or more physics and engineering tips. Well I was wondering if some of the Biochemists could help me out. I am currently applied to a Biotechnology program in the second year. Since Biotechnology takes heavily from Biochemistry I was...

So one of the research groups at my school is looking for "graduate students like me" - according to the professor who runs the show. They are sponsored by a large tech company and they need to review me also. I'm a comp engineering Masters student btw. About the assistantship: It's an...

If you could offer any tips for studying for an Algebra test for tomorrow morning it would be great. It covers: Vectors: Vector quantities and $\mathbb{R^n}$ $\mathbb{R^2}$ and analytic geometry Points, line segments and lines. Parametric vector equations. Parallel lines. Planes. Linear...

Give me some tips! Hey guys, Can anyone give me some tips for distance learning education, with the help of which I can perform well? I can score good marks in exams. Please give me some tips for it. Any help will be highly appreciated. Thanks in advance.

Hi I'm struggling to create a DoublyLinkedList<T> class in Java. Well,it's actually the iterator that's freaking me out.. Most tutorials and documents I've read use three classes for this:Node<T>,DoublyLinkedList<T> and LinkedListIterator<T>. I can see the point in creating Node and...

Hi, I have the following problem: Calculate the pH of a 0.200M Sodium Cyanide solution. I'm confused because this salt has no H or O atoms in it. How could it affect the pH of a solution? What formulas would I need to solve this? My final is tomorrow and I'm really worried. Thank you for...

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hi, i have my SAT exams this saturday. i was wondering whether anyone would be having some tips concerning the test. I'm an international student (from mauritius). my mathematics is ok, but the english section might be hard, specially for words i never met before!