Desperate Definition and 89 Threads

Ok here we go.. (warning: contains angst) Not even sure where to begin. I guess I'll start with my current situation. I failed the first year of my maths course in university. I had several crippling addictions (MUDding and smoking weed) as well as an unhealthy and distorted mindset which...

here is the problem I couldn't solve, anyone got any idea please help me. thank you very much in advance 1) use double integrals to derive the given formula for the volume of a right circular cone of radius R and height H. the volume of a cone is given by the formula (pi*R^2*H)/3 I...

desperate college student needs help in double integral! here is the problem I couldn't solve, anyone got any idea please help me. thank you very much in advance 1) use double integrals to derive the given formula for the volume of a right circular cone of radius R and height H. the volume of...

Homework Statement I am having trouble with two problems. 1. An onion grown in 1994 had a record breaking mass of 5.55 kg. Assume that this onion can approximated by a uniform, solid sphere. Suppose the onion rolled down the inclined ramp that had a height of 1.40 m. What was the onion's...

Homework Statement 6+X = 3+(X/2) ---- X Homework Equations Quadratic formula? The Attempt at a Solution 2(6+X) = 3+X ------ X 12+2X = 3+X ------ X 12+2X = X(3+X) 12+2X = 3X-X^2 so, X^2+X-12 when putting it in the quadratic formula, I don't get the right...

If you can help me on even one of these questions, it's greatly appreciated! Homework Statement Use the following info to answer next 4 questions: The vapor of Element X produces an emission spectrum that consists of wavelengths of 400 nm, 550 nm, and 680 nm. 1) If an unexcited...

all, i am stuck on this problem. physics has not been good to me this semester. its like "in one ear out the other" this is the problem: i can't get c or d. for c i tried .25(29*9.8+117.37*sine(40)) that wasnt right for d i tried 117.37*4.1 and that wasnt right please help me.

i have a few questions that i just can't seem to understand, if you could PLEASE help me i'd appreciate it! Consider the quadratic function f(x)=2x^2+4x-3 what is the domain and range of f(x)? and Find ALL asymptotes of the function f(x)=x^2-x-12 ______________ x-2 * that's suppose to...

Really Desperate For Help! Homework Statement Quad MNTS ~ Quad MOPR Find the length of PQ Homework Equations Big ___ Small The Attempt at a Solution i have done numerous attempts and i can't figure out what to do after i get the ratio of 5/4

a .565kg football is kicked from the ground at a speed of 22 m/s. what is its speed just as it passes between the uprights 5.0 m above the ground? please help! G: m= .565 kg v= 22m/s 5.0 m r: velocity a:no kinematics's equations

I have this reaction: CH4+4(O2+3.76) --> CO2+2H2O+2O2+15.04N2 Through other calculations and given information I have found that the mass flow rate of the air (the O2+3.76N2) is 25kg/s and the mass flow rate of the fuel is .87 kg/s. I am having the hardest time finding, using these mass...

Homework Statement A 98.6 kg box is resting on a horizontal surface. The coefficients of friction are uk= .1602 and us= .6027 for the surface to box. The box is attached to a 59.1 kg rock by a cord that passes over a frictionless pulley. What is the acceleration of the 59.1 kg mass? Make...

Hi, I have been doing a simple experiment with a 2L bottle and a cut out slot near the bottom. I have gathered data regarding the time it takes the water level in the bottle to go from 13cm above the slot to the slot itself, versus the area of the slot. My data shows a perfect inverse...

DESPERATE NEED OF HELP ON THIS Physics PROBLEM! Okay for those who are really smart in Physics, please help! I've been staring at this problem for hours and I just can't figure it out. :rolleyes: I know that you need to find the final velocity and then time, but it just seems like there's not...

Hi, I am starting to get desperate with my search to find information about the reaction of plastics with acids. I have searched all over the internet for a while now and I have found very little. If anyone knows anything about the form of any reactions that take place with plastics and acids...

Desperate Need of Help! I've done my homework (except one problem) and I want to make sure I am correct? 1. What is the sign (delta G) for the folding process? Unfolding? How do you know? -(delta G) at low temp is positive and equilibrium will favor protein folding. At high temperature...

I have trouble solving this first order nonlinear ODE : f'(x) = \frac{af(x)[f(x)-bx]}{(1-c+bdx)f(x)+bcx-df(x)^2} where a,b,c,d\in\Re_+ are parameters and x\in\Re_+. The particular solution I am looking for should be such that: f'(x) &>& 0\\ \lim_{x\rightarrow 0}f(x) &=&0\\ f(x)&\geq & bx...

Help me! Redox help, product predictions I have a lab that we have to get a perfect score on to pass the class, and I'm so overwhelmed and confused right now I could really use some major help. Basically we were given the names of 9 mixes, and we have to predict whether or not they will have...

I'm a Junior, in my 3rd year of Algebra I will probably just try a tutor, but... maybe somebody on here could help me for the time being. Here is an example of a test we take. ********** Solve: (6, -3) (-4, 1) Point Slope Slope Intercept Standard Intercepts ( , ) ( , ) **********...

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this is due on wednesday i would really liketo hand it in on time couple of my questions are in these threads which have not gotten any answers... https://www.physicsforums.com/showthread.php?t=106913 https://www.physicsforums.com/showthread.php?t=106930 For a particle of mass m moving in...

I have a test tomarrow and My tutor did not show up at 9pm like he was supposed to... I have been working as hard as we can to work out the problems but still have 4 that we have no clue how to even begin is there anyone on tonight who can help? Please IM me Quad150db at yahoo or AIM or post a...

The energy generation rate for p-p fusion has an approximate dependence on density and temperature given by: E= e (p/pc)(T/Tc)^4 i don't know how to write all the symbols so in the above: E is epsilon, e is epsilon at the centre of the star, p is the density, pc is density at the centre...

The question says... To create artificial gravity, the space station shown in the drawing (THE DRAWING SHOWS THREE CHAMBERS, WITH THE TWO OUTER CHAMBERS BEING A'S AND THE MIDDLE BEING B) is rotating at a rate of 0.720 rpm. The radii of the cylindrically shaped chambers have the ratio rA/rB =...

I'm in big trouble, I have a Chapter test in Physics tomorrow & I don't get anything that will be on it. I can't answer any of the problems on the hw...I just don't get it. How do people find out the answers to these problems? I'm not one of those people who can spend 1 hour working on a single...

2 a) Calculate the expected mass of one mole of 31^P atoms that the avogadro constant equals 6.0225 x10^23, the mass of one electron equals 9.1091x10^-28g, the mass of one proton equals 1.6725x10^-24g and the mass of one nuetron equals 1.6748x10^-24g. b) The actual mass of one mole of 31^P...

Desperate Help Needed! hey everyone, i'm kinda new but i know how this works. this has nothin 2 do with science or even maths, its history but i really need help. I've been to several sites to learn about the battle of the Somme which occurred in world war one. sites are giving me different...

Hello everybody! My name is Nazia, and I’m from Australia . This is my first post, so please let me know if I do something wrong. I’m 15 and in grade 11. I seem to be having problems with Projectile motion. Recently, we were required to conduct an experiment, in which a marble was launched...

Waves and Energy transfer problem (please am desperate) Well, this is the problem that is breaking my head the time needed for a water wave to change from the equilibrium level to the crest is 0.18s a) what fraction of a wavelength is this? b)what is the period of the wave? c)What is the...

Ok, I have a confession to make. I LOVE the tv show "Desperate Housewives". I didn't watch it the first few weeks it was on because I assumed it was just another stupid, smarmy soap opera. Boy was I wrong. The show is clever and HYSTERICALLY funny, with several bizarre murder/suicides...

Simple algebra, derivations, integrations. Desperate need of help :) Hi! This is my first post here (and it's not a very funny one). :) It's been a long time since I took any math, and I'm getting more and more confused. Need some help! a'*m' = b'*m a*m' = b*m b-b'=(a-a')*(m/m')...

Several optics questions, need desperate help. I have some questions about optics. I've been working on these problems unfortunately over thanksgiving break and without a book (I forgot it to bring it) So any help you guys can give me will be awesome. 1. A concave mirror has a radius of...

These two are toughies for a first year rookie like me. I survived kinematics, and I thought I survived circular motion. But the work-energy chapter just threw 2 curveballs in my face. Any help would be more than appreciated: 1) The drawing shows a version of the loop-the-loop trip for a...

Okay, here's the problem: For my freshman chem class we need to know which of Dalton's 4 atomic theories were disproven. There are two of them. I can't figure out which ones. Also, we need to know why they are wrong. I need this by tonight. Someone please help me! :bugeye: Thank you...

I have been trying to get a hold of my Physics tutor all morning, but he left for the week already the Veteran's Day Holiday cutting the week short and all anyway I only have a couple of questions left and could use some tutoring help on them so here goes: 1). A 5.0g coin is placed 15cm from...

For an n*n matrix C=(cij) over R or C, we define v(C)=Max|cij| a.Show that if A is invertible, then B is invertible if v(A-B) is sufficiently small. b. Show that for any, not necessarily invertible, n*n matix A, there is a sequence Ak of invertible matrices with v(A - Ak) -> 0 .

Desperate for a help with tension in rope! Two blocks are connected by a cable via a pulley which are massless and frictionless. Given the following: m1 = 300.0 kg, m2 = 100.0 kg, theta=40degrees, uk=.350 ,what is the tension in the cable? So have figured out the acceleration to be .304m/s...

Desperate for a help! Ok , I have a test tomorrow and I can't seem to answer this question: In doing a lab using Atwood's Machine would the acceleration have been different if we used an initial velocity? What variable would be changed if we used intial velocity?(displacement...

IAM SO DESPERATE...I need help with hovercraft project Hi everyone, Iam a student designing and building a hovercraft project with other group members at school. my problem is that i can not find the actual calculations (equations and formulas) to start the start the design :confused: ...