Member Definition and 250 Threads

Homework Statement Find the value of ArcSin[2]. NOTE: This question was asked in: https://www.physicsforums.com/showthread.php?t=226670 I made a new thread since I wasn't sure about my solution and didn't want to confuse the OP or anybody else. Homework Equations e^{i \theta} =...

Hi guys, I was wondering if you could help me with the following: 1.I declare a class, then put public members into it. 2.Then I make member functions that return values that are computed from the values of other members. These functions would have no input, I guess, so I gave them none. I...

I am new here. I am Aniana. One of the latest member here in physicsforums.. I am glad I have your site.

Homework Statement Determine the force in each member of the truss shown. Homework Equations \SigmaFx = 0 \SigmaFy = 0 \SigmaM = 0 The Attempt at a Solution I divided up the truss into different systems, the whole truss, and then a system for each pin. I must be doing something...

Which fish would you prefer to be slapped with?

So I know the that the general rule for identifying a zero force member is that if two members form a joint and no external loading or reaction forces are applied to the joint then the members must be zero force members. And if three members form a joint for which two are collinear, then the...

Hello, I'm trying to solve this equation : \frac{d^2f\left(x\right)}{dx^2}= A\exp\left(f\left(x\right)/B\right) (which comes from plasma equilibrium) I can't find out what's the general solution... is there a method to solve with this kind of second member

Homework Statement http://img210.imageshack.us/img210/5118/probrb4.jpg The weight W=50N acts at the center of the disk. Use the fact that the disk is a three force member to solve for the tension in the cable and the reactions at the pin support. Homework Equations The Attempt at...

Yes, we're getting close to that time of year. We're going to need nominees for Funniest Member. This has been a rather dry year. I know some of you are just hilarious. It's time to start strutting your stuff. Artman, where are you?

Homework Statement using joint method,indicate all the zero force members in the truss (Note that G is a roller, and A is a pin) Homework Equations \sumFx, Fy=0 The Attempt at a Solution my solution: consider D, by summation Fx,Fy=0, F(cd),F(de)=0 consider E since\sumFx=0,=>...

I am currently a college student who has always had a love for math and science. I was recently thinking and discussing with some of my friends, how mass increases with speed as it gets closer to the speed of light. Then I started thinking about the concept of speed of light and how it is the...

Homework Statement Determine all the member forces in the truss shown below, and identify tension/compression for each member. I know there was more to what I was supposed to put here, but I really only have a terminology question. I know that I have to determine all of the reactions...

A member has complained that all scientific references should ONLY be made to articles in peer reviewed journals. He claims (and this is in reference to P&WA) Based on P&WA's guidelines this does not apply. But since I am a fair person I will let everyone vote. Do you want to do away with...

concept of resistive touch screen, anyone an IEEE member? hi, i am having a problem with my 8 wire resistive touch screen the cursor keeps drifting about due to analog noise i suppose i would need to program an algorithm to clean up the noise to keep it stationary. i have tried putting a...

http://home.comcast.net/~integral50/Ricochet/HPIM3513a.JPG It was just a year ago that I was hauled 50mi to the pet store to watch while \partial and \partial ^2 bought a puppy. They did it again.. seems like our average is not quite small enough, we need a smaller dog. This little...

It is geometry. In a isosceles triangle is i nscribed a circle. Three more circles are inscribed in that triangle so that every circle touches the big circle exactly at one point and the two sides of the triangle exactly at one point. So the problem is how to set the ration between the...

Homework Statement A block with a mass of 150kg is supported by a cable which passes over a 150 mm diameter pulley that is attached to a frame. Determine all forces acting on member BCD of the frame. The distance from A to B is 600mm, and the distance from A to C(just horizontal...

Building a Speaker...New member ok, well firstly let me introduce myself; I am a new member here, I am by no means a physics/engineering person...but I got myself stuck in grade 12 physics and I am almost through the semester. Now we've got this assignment to build a speaker or headphones from...

Homework Statement "The axial load for a given test sample carries 1590 N. Calculate tensile stress at sections (1) and (2) assuming the sample thickness is 5mm. (Rectangular cross section). http://img208.imageshack.us/img208/121/tensilestressby1.th.jpg Homework Equations normal...

Hey everyone. I'm a sophomore in Electrical Engineering, and loving it (except for the homework...and tests...). Anyways, it's almost time for me to be applying for scholarships (well, in a couple months), and I was thinking about applying to IEEE as a student member. I was wondering if anyone...

Hi No doubt this question has been asked by many before. I am new to the study of Relativity. I have spent several months reading this and that and generally getting very confused. One thing that I just can't get passed is understanding even what the heck tensors are. Every single...

Yep, it's getting close to that time of year again. The Annual PF Guru Awards will be coming up in a couple of months. We need to start seeing some funny posts. I've seen some really funny posts by zooby, yonoz and Math is Hard in the stupid quetion thread recently. Aside from that...

New Member and Need help with a question Hi. I am attempting to study introductory College Physics on my own so that when I find the time to go back to College- physics won't be so hard. I want to major in Math and Physics. Right now though, I am stuck trying to understand vectors. Could...

PF Member becomes famous! Fellow PF member bitjumper (and my very good friend) was on MSNBC, made the headlines of the local paper (attached link) and has been contacted by numerous radio stations. I'm proud to say I was one of the first in on his "campaign". :smile: "Erik Kilk, a...

hi to all...am a new member here...:smile: :!) hi to all...am a new member here...:smile: :!)

There is essentially no difference between a superclass of a class and a public member variable of that class. For example, if you define public class Blob { public int mass; } then defining public class Ball extends Blob { public int radius; } provides all the same...

I have a simple statics problem that I am trying to solve. The rigid body to be analyzed is an upside down L-shaped beam connected together at the corner by a pin. The object has a height of 4.5 meters vertically, by 3.5 meters in the horizontal. Additionally, the object is secured to the ground...

Is it possible to give a set of inconsistent sentences with only one member? An inconsistent set of senteces requires that it is not possible for all members of that set to be true.

Sorry for the etc... you know who you are, I was running out of space. OK, it's going to be a fierce week. Here is your opportunity to strut your stuff. Post your best posts here. I think this will be a fun stroll down memory lane for all of us!

Hey guys, I need setting up this problem. Here it is: A structural member is fabricated from a solid round bar of steel with a diameter D=50mm. If the member is 6.0m long, determine the maximum axial force that can be applied if the axial stress is not to exceed 175MPa and the total...

I paid, just now. Am I yellow to anyone? I still can't have an avatar or sig

Because besides Evo's statue in Sweden, none of you have your own tower in another nation :smile: :smile:

now, I know that everyone at PF hates MENSA immensly, but I don't care. I'm wondering if anyone here know's how to join. it seems like the MENSA test is figuring out how to become a member. I know I'm qualified. I'm in the international high iq society, and my iq is about 135. but how to join?

I've come across a problem I can't solve, and I'm hoping you can help me out here...I've got this setup you can see in the drawing. I'm supposed to find the the axial-force in the member BC. I don't even know where to begin...the answer is supposed to be G-\sqrt{G^2-GF} Anyone...?

In this game, I (and later, I may nominate others to help me) make up cryptic clues that reveal the usernames of PF members. Other folks guess the names (and provide the reasoning). Here's an (medium to high difficulty) example : Standardized test leads a free fall Answer in white ...

I was reviewing my book when I got to thinking about a special type of connection, the "member fixed connected to collar on smooth rod" It prevents a force in the direction normal to the rod, and also prevents a moment. The first part is fine, but the moment part worried me a little bit. Since...

By popular demand, here are the member photos only in alphabetical order. Continue to post pictures and comments in the member photo thread, and the pictures will be moved here. I want to say thank you to tribdog for getting this started. Hypnagogue has spent the last few days gathering all...

Hi everyone :smile: I need help to answer these question related to physical chemistry : 1- In reaction Kinetics, what reaction takes place during titration? 2- In reaction kinetics, why do we use a water bath? 3- Why Dicarboxylic acids do not show a clear odd-even effect in pKa...

I think I've had some pretty good posts in here, and I won't be the easiest person to forget, so I'd like my screen name retired if I ever die.

Visit www.quantumninja.com then click film i suggest watching jesus vs muhammad and the spirit of christmas any comments would be great

Hi! Just discovered this forum, and it's like the best ever! Anyway, I do have a question. In statics I hear about an "axial member" of a structure. This means that the force in this member works along the rod or wire or whatever, so that the direction of the force need not to be determined...

Jorge Pullin co-authored a recent paper aimed at resolving the BH information paradox. This just out http://arxiv.org/abs/hep-th/0406260 It seems to make sense, they say look at an actual clock and you have to admit that evolution aint unitary and states eventually decohere and before...

i know I've only been on for couple of months, but i was always afraid of asking for help. thanks to this site, i now understand all of this theory stuff! ?'s prove that [alpha] + [alpha + 1/3] + [alpha + 2/3] = [3 alpha] for all reals alpha. prove [alpha] + [beta] <= [alpha +...

hi.. I am new. well, actually i signed up for this thing a few months ago back when i was in calc class... i was searching for math help on google and found a problem similar to the one i had a question on here... i signed up and havnet been here since. i think i can learn a lot from these fora...

Hi everybody, I'm a new member in these lovely fruitful forums.I'm sorry of bothering you but I love math so much and I spend much of time with it.I'd like to ask you a strange question :confused: : Is there a scientific math website redirects the beginer mathematicians and discusses their...

sir, I am a member of Michio Kakus's organisation.Some days later i have ask this organisation a question about astrophysics and in reply they have told me to send this question in Michio Kaku's forum. As a member of the organisation i would like to ask you a question about astrophysics.If...

First of all I'd like to say hello to everyone. I've just started my first year physics course at the university of Brussels and after 2 months I have to say that it turned out completely different than I expected. I knew I would get a lot of math and physics, but I expected something...

Yeah, so i was looking through the archives at every post I've ever made. And its really neat to see the way my posts progressed. Originally, i only ever asked question, i didn't make many statements that could be refuted or argued. I was too scared. most of you don't know this, but I'm terribly...

Let's see ya... c'mon don't be shy ok ok I'll go first btw, please don't print this photo and throw darts at it... thanks also when posting your own, for the database's sake try to optimize and crop as much as possible to reduce the file size.

http://members.aol.com/crebigsol/awards.htm this may be old but did anyone win?