Tips Definition and 553 Threads

Homework Statement I have been practicing proving trig. ident. for the past couple of days... although I am getting better... I wanted to ask are there any strategies that I should be aware of to make the process easier ? Homework Equations The Attempt at a Solution

Since I'm trying to make sense of the application of a concept, I figured I'd post this thread here. If this belongs in the homework forum, I sincerely apologize. For the longest time I would do integral problems in Calculus. I figured I understood how to do them because after I finished...

Hi, How to prepare to the GRE exam? and, how to get high score?

"Science sense" list trashes celebrity health tips It's amazing what people choose to believe. read on for some nutty ideas. Reabsorbing sperm is a good one. http://news.yahoo.com/s/nm/20101229/lf_nm_life/us_science_celebrities

my program is not working properly after taking values it gets overflow #include<stdio.h> #include<conio.h> void insert(struct node**, int); struct node *ptr; struct node { int data; struct node *right; struct node *left; }; void main() { int will , i , num; ptr = NULL...

Question on Solving Laplace Equation Potentials. Hello, I'm learning how to solve Laplace's equation to find Potentials in Cartesian, Cylindrical, and Spherical Coordinates and let's just say it's not going as smoothly as I'd like. In particular, I'm having difficulty with the Spherical case...

I've just finished pre-calculus with an A+, so the math won't be much of a problem. Due to some unfortunate circumstances, I will have to take the course online before I can do grade 12 physics in school. I was just wondering tips on succeeding in this course and the do's and don'ts? Is it...

I am having a real tough time memorizing the unit circle and it's values. What would you suggest to make easier for me to remember the quadrants, square roots, and radians?

Homework Statement Find the value of limit x-->0 cosx-1/x The Attempt at a Solution one thing i understood is that i can't use the triangle and circle way as i did for limit x-->0 sinx/x nor have i found out a way to use the 'sandwich' theorem. So anyone have any tips please...

Hello guys Does anyone use Maxwell Ansoft? If so, have you tried to export it to Excell? if so do u use any MATLAB code to convert it? or use macros in excell? Thanks

I have a really bad math background, so sometimes I struggle with or am just a little slow with some algebraic things, while I can handle more abstract stuff fairly well. Lately I've been running into certain types of problems in my algebra class which are proving to be time-consuming for me...

Hi everybody, i have 16 days to prepare a speech for my increasingly closer wedding day so my question to you is this, what makes a good grooms speech?

When I started school (2-3 years ago) I thought the best field to get into would be the IT field. Few months later I get an IT job and it's "meh", then I get a better paying IT job and it is even more "meh". Long story short I cannot stand my classes and have grown to hate the IT field, hate...

hello everyone! I just started a course in real analysis and i must say that it is quite different from all the "engineering math" that i have taken before.I was wondering if anyone could give me tips or advice on how to get better at writing good proofs. Right now,we are using a book called...

What are usual tips in conjecturing formulas for math induction if I am given a certain sum of sequence? Thank you.

Homework Statement Tomorrow I am having probability exam ,but the main issue remains. I need tips in solving problems. Example ,when would the question be related to permutation or independent events or else .I know how to solve it which is pretty easy in probability but I need more tips...

I am just wandering how everyone studies or what good study methods are. My father tells me to read the topics the night before the lecture, then listen to the lecture carefully and then study the topic again after coming home on that day. (I'm in first year of Higher secondary school, K-11...

In school I'm in a class AP Computer Science where we learn java. In the past few weeks I have learned the basics of java which came very easy to me. Now I want to know what can I do to my programs to make them stand out? What should I strive for, least amount of lines or looks the best(we...

hi everyone, I'm a mechatronics student. I'm sorry i posted this question here. I hope i can get some tips/answers/designs(rough design) http://i101.photobucket.com/albums/m62/minmonster57/Robot_Arm_Design.png I'm having this Robot building project. And faced a designing problem, This...

I posted before about possibly retaking the physics GRE, but now I have a question about the general GRE. First of all, I took the general GRE years ago, and scored well as I recall, but ETS drops scores after 5 years, so I have to retake the booger :mad: I mean, there are sooooo many other...

I have a midterm tomorrow and I find I'm quite slow at finding the determinant of a 3x3 matrix. Basically I'll only need to find the determinant to find the characteristic polynomial (at least for this class) and my prof on the board does it so fast, I'm wondering if there's some trick I missed...

OK, I have a plan to learn this summer after all of my exams will end, some subjects in physics and maths (GR,QFT, measure theory,DG and some random matrix theory, not sure if this plan is tangible, I'll try), so for GR I think of using Wald's and A First course in GR, maybe I'll also look at...

Hi! I am trying to demonstrate a solver for non-linear ODE an wonder if anyone has got a tip on one which is non-trivial to solve, and has some significance to some people so that maybe someone will read my report =) If you got a good tip, thank you very much!

I'm taking the SAT II subject tests saturday and I know it's a bit late but I need to cram. I have done barron's for math and spark notes book for chemistry and I consistently get around 620's on both. I'd like to get above a 700 but I'm having trouble. 1. Are these all of the formulas I...

If you are going to buy a computer, then buy a laptop computer. It needs less space and less energy to operate. No need of ups or any additional things all are in built. Ethan

Exams which are the Irish equivalent of SAT and A-Levels are starting next week. The samples below illustrate the differences. Does anyone have any advice how you should prepare mentally for these exams? Like how should you get yourself into the correct frame of mind? Here are sample papers...

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I have problems solweing this task. In magnetic field with induction 0.25 is a flat coil which has N=75 whrols with a radius of 25cm. Angle between Coil‘s flat and magnetic force lines is 60 degrees. How much torque afects coil in a magnetic field, while there flows 8A of curent? What work...

Hello PF. I am a Greek student ,currently in the 9th grade. I love mathematics and physics and I want to study Computer engineering. I am planing to study abroad preferably in the US or UK. Recently, I discovered an option to take some IB diploma courses for the 11th and 12th grades in...

Hey guys, I have my final exam in a week for my thermodynamics class. So far this year, things have been sort of roller-coaster-like. I did poorly on my first test because I was caught completely off guard. On my second test, I raised my grade substantially to the point where I was...

Homework Statement A cube of side l rests on a rough floor. It is subjected to a steady horizontal pull F, exerted a distance h above the floor as shown below. As F increases, the block will either begin to slide, or begin to tip over and thus rotate. Determine the coefficient of static...

Just had a 4 hour exam and I was physically exhausted after taking the test. I'm in good shape, but concentrating for that long is tough. Does anyone know how to "train" for long tests? I was considering trying to study in 4 hour exam-like increments, any other tips?

I'm curious, what do you PF'ers prefer when it comes to staying up to date with science news? I.e what websites and/or subscriptions do you recommend? Currently I check physorg, sciencenews.org, and sciencedaily.

Homework Statement I bought an FM radio mono kit. After I assembled it, it works. But I want to know how to have a clear reception or signal and to acquire more stations. What should I do? Any tips or techniques? does the coil affects the signal? Homework Equations The Attempt at a...

Hi there , I am a recent graduate from nuclear engineering and I need some tips from nuclear experts : Should I start looking for a job or pursuing a master degree? and what about getting MBA? What is the most promising research area one should get involved to increase my job opportunities in...

Hi, When drawing the FBD (ex. block on incline), and when you split a force into x and y components, where do you put theta when giving the angle of let's say, the incline? Is there a trick to this? I generally know where to put it (basic trig), but for some reason I can't use trig for some...

1. The problem statement, Last year in physics i did good on every test but the kinematics test. i got a 69% on it... Now i am in Grade 12 physics and my Kinematics Test is tuesday. We are given a formula sheet. I don't want to get another 69% on a kinematics test, i want to do good, like 75...

Nevermind Thanks!

Hello. I have a very large, very complex equation to post here at the forums. I just finished writing it in Latex but I am having problems posting it. In the past I have always used the short cut keys, but this time a wrote out the whole thing. Here is one part in Latex: A=...

Hello, I have an AP Calculus midterm tomorrow and was wondering if anyone had any tips or tricks to help me succeed. The course material covers finding derivatives of any single-variable function, applying them in optimization and related rates, integral approximation, finding the integral by...

Hey guys, I need some help and I hope you all will be able to assist me. I dream just like everyone on this forum to one day become an engineer (concentration - Automotive Sector). I'm 15 years of age and presently I have no means of true hands on exposure to the field, are there any tips...

Okay so, I'm a freshman in a Physics I class. I must admit, it's not the easiest thing ever and I really want to pass this class. Physics doesn't come naturally for me but most other people in my class seems to understand all the information bieng taught. I'm however mostly clueless. One...

I need to build a toothpick model that can hold a 16 pound bowling ball. I have no idea where to begin, does anyone know of somewhere I can find a tutorial or something?

Hi there PF. For this problem I need to take the following code which apparently sorts an array with integers, and sort strings instead. However I DO NOT understand how this works for integers, much less how I could make it work for strings. Could someone please explain it to me? A few tips to...

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One thing that can REALLY mess you up gradewise is trying to figure out how to do a problem, and spending so much time tinkering with it that you are not getting any actual homework done, you may think you've spent countless hours studying but you were not studying right so you get an F on your...

Hi, I am slowly realizing that for the first time in my college career I have a class that is very difficult to get my head around. Not so much in that I have trouble with the topic at hand, I actually find it quite interesting rather that it seems the class is just plain bad. 1. Our...

There are much better debaters here than I am, so I seek your advice. My question is, how would you respond to: "So you believe Obama. What do you say about this?" (Then the following link was supplied.) http://obamawtf.blogspot.com/2008/05/documented-lie-50-obama-claimed-he-had.html My...

Hi, I'm currently working on Mathematics (3rd year) and doing Physics alongside. My Universities Math department is ranked well among other top 30 (50?) Universities in US but the Physics department sucks, it really does. I'll have to stick with this university for my remaining undergrad...