Desperate Definition and 89 Threads

I am doing a project for Physics at the moment, and I am really struggling to come up with ideas. By that I mean, I have plenty of ideas but none of them are really feasible for what I am doing, i.e., impractical to do at home (too much work in doing the actual experiment), or that the actual...

Hi I'm new here and I've checked everywhere on google but I can't seem to find a website that'll tell me the spring force constant of items. Also what things would be in the range of a spring force constant of 163.427 N/m/

Okay, I have a good friend and he is into the idea of becoming a Mathematical Physicist; however, there's several issues at hand. He's in his mid 20's and attends a really cheap community college. Apparently his high school was horrible at teaching students good material; in other words, he...

I have my BS in physics and am looking for anything , anything that i may be qualified for above 35k a year. I worked too hard to make $10-20 an hour and want something viable that i can excel at. Does anyone have any job hunting tips? job titles that i may be qualified for? etc ive been...

Hey so I'm getting the error message: Euler_Method.f90:43.1: fun=(c)(1-c)/(d+2) 1 Error: Unclassifiable statement at (1) And here is my code: PROGRAM Euler_Method !------------------------------------------------------------------- ! The purpose of this program is to read in endpoints...

What happens when we fall in love? As a result of certain stimuli, the hypothalamus releases a powerful discharge of endorphins, but why exactly that woman or that man? Is there a release of odorless pheromones that correspond to a complimentary genetic signal? Or is it physical features that we...

Hello guys (and girls as well). My college is having a physics open day on the 30th of april, however we should be done our preparations by the 30th of april. do you guys have ANY idea that we perform? no matter how small or large it is please share it, we need the ideas to keep flowing

hi folks, my back story is that I have failed my strength of materials and dynamics twice. the college I am attending put these courses in an accelerated time frame... this means 14 weeks of material turned into 7 weeks of material. I am not able to learn at that pace, hence why I failed twice...

Just finished Physics I and II, and getting ready to start Thermo/Stat Mech, Wave/Particle Theory (Modern Physics), ODE, Electronics lab, and a Cryptography elective next week. When I look back at how I took and organized notes, I feel that I wasted a lot of time shuffling through loose leaf...

Hey people! My names Josh and have always had an interest in the natural world, physics, and most especially, astronomy and all its related fields. Unfortunately, it stopped there and remained simply as an interest, mere dabblings in fields of knowledge that I really had no comprehension of...

Hi everyone! I searched all over the web and nobody/nothing gives a good explanation on how to plot nyquist diagrams... can somebody help with these ? I can't go forward in my study of control engineering without knowing these and I'm stucked... How are nyquist diagrams plotted starting from...

I recently asked my professor if he had any research opportunities in the following semesters and he told me that I should download and play around with 'Fortran G77 Compiler' and get back to him. So, I've looked into it but didn't make much progress.First off, I'm confused with which program...

I need to find the value σ for which: ψ0(x) = (2πσ)-1/4 exp(-x2/4σ) is a solution for the Schrodinger equation I know the equation for the QHO is: Eψ = (P2/2m)ψ + 1/2*mw2x2ψ I've tried normalizing the wavefunction but I end up with a σ/σ term :( Any help would be greatly...

I am a Electrical Engineering pre-major at UW, and I am currently taking Cal 2 in the Summer. I find that most of the material is pretty simple to grasp; however my teacher can hardly complete an English sentence, and let alone clearly explain calculus.. The only reason that I am surviving it...

Hello all, I am a new member here and am currently doing my PhD in nanoscience related area. My husband is a successful phd and currently in academia. I joined phd right after my masters, and hence have no industry experience. However, I am keen to enter industry after I graduate...

I have these practice trig problems for a test. I understand the simple graphs but its these more complicated ones. y=2sec(3x-pi) my approach: I first find the period and phase shift. Since the period of a normal secant function which is 2pi. Then the period of this one is 2pi/3. The...

Homework Statement http://img855.imageshack.us/img855/5648/fbds.png Basically I am analysing the human leg in the given position. I need to find the force (F) which is exerted at point C, when the person is in such a position. Point B represents a "pin connection" at the ankle, body AB...

I got a test and I am having trouble on functions. On the quiz we had this problem on composite functions. given f(x) = 6/(3-x) and g(x) = 5/3x find the following a. f of g b. the domain of f of g c. the range of f of g My attempts a. For a I got 6/3 - 5/3x = 18x/9x - 5 which...

While dealing with a wave problem, I encountered the following equation \frac{d}{dx}\left[(1-x^2)^2\frac{d}{dx}y\right] - k^2y = -\omega^2y with x ∈ [0,A], (0<A<=1) where k is a real number. Thus it has eigenvalue ω^2 and weight unity. Boundary conditions are \frac{dy}{dx}...

I am looking through all sorts of tutorials and I could swear I am doing this right. But obviously not. The source code compiles and generated the PDF just fine, but no citation number shows up (just ?? in stead) and no bibliography section is generated. Here is a sample code. I know the...

My husband and I frequestly have arguements about physics when we are both intoxicated. Needless to say neither of us really have anything but a basic, basic, basic, understanding of physics much less astro-physics and the nature of the way things work. That said, may I introduce my husband...

Homework Statement Hi, I am trying to complete my MSc in Structural Engineering and being an engineer my maths sometimes let's me down. Please help me to solve this 3rd order differential equation...it relates to solving the later torsional buckling of a beam. Here goes! So far i am at this...

I know how temperature, volume and pressure are related and I think (think because I haven't tried any exercise alone yet) I can apply PV = nRT with no problems. But usually I am not able to apply a formula until I understand how I got to it, what it means. I'd like to start from the beginning...

ok, and object is hanging on two strings. The object weights 20 kg and the angle of the two strings are different, one of them is 60 and the other one is 70. There are no other forces in it. I need to figure out the tension of each string. Please help me

Hey! Could anyone post solvation of lim x->+eternety (x - x^2*ln(1 + 1/x)) using Taylors formula? Need to go to exam in 1 hour, would be so thankful for person who could answer thatin this time :D (desperate)

could someone please help me I am urgent & desperate Homework Statement True or False, give proof or counterexample (1) If a_n \geq 0 for all n and \sum a_n converges then na_n \rightarrow 0 as n \rightarrow \infty. (2) if a_n \geq 0 for all n and \sum a_n converges, then n(a_n-a_{n-1})...

Homework Statement Give a Cartesian equation of the given hyperplane The plane passing through (1,2,2) and orthogonal to the line x = (5,1,-1) + t(-1,1,-1)Homework Equations The Attempt at a Solution So I've looked at this for a few hours and still can't figure out how to do it. It's supposed...

Homework Statement Hi, Can someone please explain me on how to do both of the question posted. Honestly speaking as i type my head is aching real bad, having a total mental block. Homework Equations The Attempt at a Solution for question 2) i don't know which region to shade for...

Desperate for help! Homework Statement I am doing an electromagnet project. I am a bit lazy and was asking if you guys could give me a list of ALL the materials I need to compete in the science fair. I'm in 10th grade, and my question is which factor affects strength of electromagnet the...

Newtons 2nd Law experiment Homework Statement I need some data for labexperiment 11 Newtons second law in which you add weights to a hanging weight which pulls a cart through a photogate. Anyway i was wondering if anyone else has done this lab because i need data for the acceleration of...

A mass is placed on a frictionless incline and attached to a pulley by a light string. The situation is sketched below. The incline angle, theta, is 42.0°, the mass is 3.00 kg, the moment of inertia of the pulley is 0.400 kgm2 and the radius of the pulley is 0.145 m. The mass is released...

Ezy velocity questions! Please help me // I am desperate! Homework Statement a)How long does it take an object to fall from a height of 20 m to reach the ground? b)if an object is launched horizontally from a height of 20 m with a velocity of 2/m/s where will it hit the ground...

Hello all! This year i have signed up for Physics B AP, it is an algebra based physics class that deals with E&M. I have been very inspired by this class, it is very interesting and intriguing, but i am horrible at the subject. I average 40% on tests/quizzes, when the class averages around...

Homework Statement Consider harvesting a radioactive daughter product from a radioactive parent at regular intervals of time, \theta. If n samples of accumulated daughter product are removed at time \theta, 2\theta, ..., n\theta, show that the sum of their residual activities at time n\theta is...

Homework Statement Ok, so, I did a experiment in school and I was supposed to find the volume of gravel + water in a graduated cylinder. However I found the mass of the gravel, cylinder instead. I also know the amount of water and gravel I put in the graduated cylinder. Can someone please help...

I'm sure this is so easy and just 1 step. I can do questions like this, I just don't understand, this theory one, or whatever it is. Homework Statement How far apart are two protons if they repel each other with a force of 1.0 mN?Homework Equations F=k * Q1Q2/r^2 k=9.00*10^9 e=1.6*10^-19The...

I've been looking for a part-time job when I get home for weeks and still haven't found a single thing. I've applied to a library, which never called back (they never call back anyone, from what I've heard) and a receptionist position that called me back and told me I was far too young, despite...

Homework Statement Let f: R→R have the property that for every u and v in R. f(u+v)=f(u)+f(v) (a) Prove: If f(1)=m, then f(x)=mx for all rational numbers x. (b) Prove: If f is continuous, then f(x)=mx for all x ∈ R. Homework Equations The Attempt at a Solution I am really lost on this...

• Choose one of the industries listed below to research. • automobile • cleaning • clothing manufacture • computer • construction • cosmetic • dental • farming • food preparation • food processing • fuel • law enforcement • medical • photography • software 1. Identify...

circuit with an uncharged capacitor -- desperate Homework Statement http://img91.imageshack.us/img91/7533/physicsimage.gif Switch S has been open for a long time. It is closed suddenly at t=0. A long time later, it is opened. Determine the potential across and the current through each...

Can someone tell me how to claculate the uncretinty on (R^2 + z^2) ^3/2

I used to always wondered why people in my age group were hopelessly passionate and seemed to fall into the stereotype of 'young and restless dreamers' until a few years ago. As I go on in college, I, as well as many other people my age, have to make more and more choices and seriously...

Homework Statement Homework Equations The Attempt at a Solution I only know how to do this with the coefficient of friction, and since there is no friction here I don't know how to do it. Normally the equation is = Fstatic friction max = v^2/r mu * g * r = v^2 and then finally root(mu*g*r) =...

It is 2 days before final exam and I don't even know how to solve this. I am so screwed.Homework Statement http://img201.imageshack.us/img201/9822/picture1ap8.png (The answers written above are supposed to be the correct answers.)Homework Equations P + (1/2)pv2 + pgh = constantThe Attempt at a...

Need desperate help! Two Children (A and B) of equal weight are sitting on the seesaw holding rocks of equal weight so that the seesaw is balanced. Which of the following events would lower child B? Explain why or why not the situation is or is not the best choice. There is only 1 most...

First of all Hi! Im from Bulgaria (Europe for the ones who don't know where BG is) and I am new to the forum Im 14 and I've started learning physics in german (i learn in a german high school..) I might have a bit of mistakes /mainly spelling/ so please excuse me for them... So tommorow I am...

Desperate ! Circular motion Homework Statement Particles travels counterclockwise in circles of radius 5m. The accleration vectors are indicated at three specific times. Find the values of v and dv/dt at each time. a. a=20 m/s^2 . vector a points toward the center of the circle, vector v...

Need desperate help! Velocity! The graph shows the change in the velocity of an object with time in a situation in which momentum is conserved. which of the following situations is most likely indicated by the graph. explain why or why not the situations is or is not the best choice...

HELP! I am desperate! 1. Homework Statement The minute hand of big ben is made of copper, has a length of 4.27 meters, and a mass of 101.6kg. The hour hand is made of gunmetal, has a length of 2.74m, and a mass of 304.8kg. Assume that each hand is a uniform rod and rotates about one end. Use...

I am supposed to make a car similar to that of a mousetrap car, except without using a mousetrap. I have basic materials and I am completley dumfounded when it comes to making the car "go." please help me! i am so desperate! i originally thought that using a car to make the car go would be...