Assistance Definition and 214 Threads

I would like to apologize in advance if this is posted in the wrong category. I am currently participating in NaNoWriMo with a story that I hope to finish and submit for publishing. It is of the Science Fiction genre, however, and I do not have the working knowledge of certain things that I...

How can we make a best resume to apply for undergraduate research assistance? I sent a message to professor and he said to send a resume. How can I make a best resume? The program is about: Assist with behavioral neuroscience testing of husbandry laboratory rats. Duties include tube/slide...

Hi guys! Kinda stuck here.. I'm trying to plot the temporal temperature distribution across a metal rod of length 1 meter. The rod is heated at one end and the temperature is measured every 5 cm along the meter rod every 10 minutes for an hour. Basically I have 6 text files, each...

Simple PDE... I'm trying to solve the PDE: \frac{\partial^2 f(x,t)}{\partial x^2}=\frac{\partial f(x,t)}{\partial t} with x \in [-1,1] and boundary conditions f(1,t)=f(-1,t)=0. Thought that e^{i(kx-\omega t)} would work, but that obviously does not fit with the boundary conditions. Has...

[1] When self studying, do you memorize vocabulary words and things like that? This isn't like taking a course where the teacher tells you what to memorize and what will be on the test. When self studying how do you separate the stuff? Or do you literally study the material "inside out" as in...

Hi everyone...how I wish someone could share their knowledge and help me through this..im having a difficulty on finding the right FBD of this problem.. I tried solving it but still I couldn’t get the right answer… anyone please help?. Here is the question: The window washer A and B...

Im having trouble with this equation and not sure if my calculations are correct, i think i have worked out the profit maximisation correct but am unsure how to calculate the revenue maximisation1. Desktop Publishing Software Inc. develops and markets software packages for business computers...

Hi All I am a mechanical engineering student and require to attach a full Wheatstone bridge to the underside of a cantilever beam, 103x27x5 mm LxWxH. Where would be the best location to mount the gauges?, also in which orientation should I mount them? All parallel to the length of the beam...

Hello, I'm from Brazil, and at my university the teacher told me to do a hashtag(#) game, built in Fortran, but I started to use this a few time ago, so I don't know how to do that! I need to do that, the faster that I can and I hope a hand from you guys. Thank you so much, Danilo.

Can anyone help me solve this ODE: ..in other words, find a general solution? dy/dx = e^(x+y) I use a separation method, but i can't take the natural log of -e^(-y). So, help?

Hi everyone, I have the answers for the following questions, I need the working out shown step by step. As i seem to get the incorrect answer. Not sure how to even start with the evaluation of integrals when in fraction form as below. Help very appreciated . Thanks 1. Evaluate the integrals...

thanks

Homework Statement Suppose there exist three functions: f:A\stackrel{1-1}{\rightarrow}B g:B\stackrel{1-1}{\rightarrow}C h:C\stackrel{1-1}{\rightarrow}A Prove A\approxB\approxC Do not assume the functions map onto their codomains. Homework Equations The Attempt at a Solution I took a...

Homework Statement Two point-like masses have common center of mass located at (xc=2.1cm, yc=4.3cm). Mass M1=49kg is at (x1=65cm, y1). Mass M2=7.5kg is at (x2, y2=(-85)cm). A third mass M3 is placed at (x3=(-15.3)cm, y3=9.4cm). What is the mass of M3 if the x-coordinate of the center of mass...

Hi I need assistance with ma electronics project.I need a site to get schematics and materials for building an automatic gate prototype using light sensor with or without micro-controller.thanks for any help

Homework Statement r = 2/(2 - cos (\pi*t)) Homework Equations N/A The Attempt at a Solution Hello everyone, first I would just like to say (which is obvious since I'm asking :-p ) That it's been a long long time since I've had to do derivatives, hence my total cluelessness with...

Do any devices exist that can assist your arms in exerting a force of 160 lbs or more in a direction of such where you would have your arms extended and move them up and down, like flapping wings for example, to the effect that you would be using the minimum amount of effort required which would...

Hello all - once again! I am an aspiring SF writer currently in the process of writing a book. I am looking for ideas (go nuts!) for different types of spaceship fuels. The idea is that the fuel has to be something that exists in abundance (preferably naturally occurring), and...

I am currently working on an algorithm which will ultimately be able to take as input a 3 matrices, (R,G,B) and convert each pixel value into hue saturation and intensity values. So far I have been able to get all but the hue portion to work properly. Here is the code thus far...

I have three n x n matrices for which I am try to compute the saturation of each element in the matrix. The function to find this is S:=1-3(Min r,g,b) where r,g,b are the color channel matrices. For my output I am trying to get it to return an n x n matrix with each element having the function S...

Hey all, hope you could help me, would be very gratefull if you could. Homework Statement Show that sin(x) + cos(x) = √2sin(x + π/4) Homework Equations sin(x+z) = sin(x)cos(z)+sin(z)cos(x) The Attempt at a Solution Ive been doing some of these trig identity problems without an...

Hello, As part of my final year project I am to run a CFD analysis of a pump impeller. I have been provided with the impeller and diffuser CAD models and successfully imported these into gambit. However, after completing a number of the gambit tutorials I still have no experience in meshing...

Hey all, I got a proposition I am supposed to prove by induction but am just a bit confused. The problem is as follows: Prove by the principle of mathematical induction that if m is a natural number, then for each natural number n, there exists an integer a greater or equal to zero such that...

Hi there! I am in need of assistance, please. My son was involved in a car accident, in which there was an obstacle in the road that caused traffic to suddenly stop, unexpectedly. He (from what he tells me) was paying attention and was slowed almost to a stop, when he was struck from behind...

please excuse any inaccuracies in the following formulation of my problem. here it goes: 1. there are n discrete time steps 2. between every time step, transitions 0 -> 1, 1-> 0 can happen between states denoted by 0 and 1. the two possible transition directions are poisson processes, i.e...

If someone could assist me with some information re: the following it would be very much appreciated. I am planning to build an energy system for my home to address the drastically increasing power bills we have been getting as a result of the unusually hot weather lately. Problem is I am not...

Hello, and thank you for any assistance offered. I believe the attached nested radical to converge to a value, but I can't find what it is. I've tried the typical recursive function methods to no luck.

Electric Potential Problem Assistance! Homework Statement There is an equilateral triangle with one point charge at each vertex. The point charges have charges of -Q, +3Q and -4Q respectively. The length of one side of the triangle is L. Determine an expression in simplest form for the...

Okay, you know how the acceleration of gravity changes by a factor of r^2 when you are falling downward from the sky to the ground. Say I drop a ball from b = 50 meters to a = 0 meters(surface of the earth). The change in acceleration over time is called a "jerk" and its the second derivative...

Homework Statement ∫ x^(5)-2x^(2)-1/3x^(4) dx Homework Equations I am familiar with the power rule and how to split the expression into three separate expressions and then simplifying. I just can't seem to sort out my algebra for this problem. xn dx = xn+1 n + 1 + C if n is...

Homework Statement Hi, I was wondering whether anyone new how to measure the effects of dielectric heating. Recently I have been looking into the functions of a microwave and understand how the process in which microwave heats food and other items by dielectric heating. I understand the...

Hi, I'm working on a project that uses a mass air flow sensor. It outputs a signal in hertz which relates to grams per second. I am trying to create a formula that I can use to easily convert the Hz to G/s. I have only been able to get a few samples of information to assist in the...

I have been engaged in a debate between a co-worker regarding the empirical evidence that astrology has a profound and unique affect on our consciousness (or our personalities and development). We had been exchange brief arguments back and forth until she finally presented me with this website...

Hello all, I'm attempting to create a dimmer circuit for some lights Id like to install in my room. I've attached the diagram below. Heres the problem: When I increase the resistance of potentiometer 2, for example, to decrease the current lamp 2 receives (thus dimming the lamp) the other...

I have selected Neuroscience is the major that I will be pursuing (for personal and intellectual reasons). I work forty hours a week and take classes at night and online through my community college. I currently have a transfer contract with William and Mary, upon completion of the required...

Im currently studying A2 physics and I am doing potentials and electric fields etc. I've learned about Coulombs Law etc. and I am having difficulty rearranging the formulae. For example take Coulombs Law. I had to rearrange it for Q2 and I spent ages just trying to rearrange it as I don't know...

1. A bike rider leaves a ramp at an angle of 32 degrees and lands at the same height after traveling a horizontal distance of 36m. What was his take off speed? 2. S=ut+1/2at^2 3. My attempt: Vertical : s u v a=9.81 t=? Horizontal: s=36m u v a=0 t=? Horizontal: S=ut+1/2at^2...

Homework Statement It is desired to have a pile driver strike a pile with a speed of 20 m/s. Assuming the driver to be in free fall, from how high above the pile should be released? Homework Equations Used v^(2) = V(o)^(2) + 2ax v=final velocity V(o) =initial velocity a=acceleration...

Homework Statement Question: A motorcycle traveling at 40 ft/s is given an average acceleration of 4 ft/s^(2) for 10 s. Find the final velocity. Homework Equations Average Velocity= [displacement][/total travel time ] v= [[x][/2] - [x][/1]][/[t][/2]...

MATLAB : Step Plots [Urgent] I am stuck at very crucial stage. I want to generate the step plot which is generated using step command in simple MATLAB environment. However, I am trying to incorporate it in GUI where it should plot the step plot when clicked on the button. Following is the...

I've been having difficulty understanding how the Parabolic Equation works... everytime I do a problem I get some really nasty looking numbers and often times it just doesn't work at all. The equation I was taught is: y = tan(θ)x - ( g / 2vo²cos²θ ) where vo = initial velocity vector...

Homework Statement given that sin theta = 3/5, 0 < theta < pi/2 find sin theta/2 Homework Equations http://www.intmath.com/Analytic-trigonometry/sinalphaon2.gif The Attempt at a Solution I appologize that I don't know how to use all the symbols on a keyboard (square roots, etc)...

Hi, I am trying to figure out where I can get a glass or Pyrex petri dish that has a tight seal or has a threaded lid. I'm holding a liquid that i don't want leaking out because it stains everything in its path. ferro-fluid. I've searched for petri dishes and found plenty, but none with a...

If you add up inverses of odd numbers, can you get an even integer? Of course, I mean you only use each odd integer once... so 1/3 * 6 doesn't work. I remember seeming to think that if this could be proved impossible, one could provide an elementary proof of Fermat's last theorem...

Homework Statement Three Forces are applied to a large boulder in an attempt to move it. The Forces are F1=(600N, 130 degrees), F2=(780N, 200 degrees), and F3=(550N, 165 degrees). What is the net force acting on the boulder? If the boulder does not move, what is the resistive force acting...

Homework Statement I need to know whether the derivation is correct, thank you in advance. Homework Equations Just relativity and parallel velocities The Attempt at a Solution \frac{v^2-c^2}{c}=\sqrt{\frac{v^2}{c^2}=\frac{v}{c} -1 by pure algebra. Now a quick look at...

Homework Statement Hey guys. I need to develop this function into Laurent series. I used the Sin Taylor series and got what I got. Now, is there a trick or something to get the z-2 inside series or is this enough? Thanks. Homework Equations The Attempt at a Solution

Homework Statement a 240nC point charge is placed at the center of an uncharged spherical consucting shell 20cm in radius. A) What is the surface charge density on the outer surface of the shell? B) What is the electric field strength at the shell's outer surface? Homework Equations A)...

Assistance Please! I'm sorry if this in the wrong section but I'm rather desperate How do you figure out the mass of a motor to have a specefic torque?

Homework Statement Give the components of the velocity vector for wind blowing at 12 km/hr toward the southeast Homework Equations The Attempt at a Solution 12cos(45)i - 12sin(45)j Isn't this right?