Output Definition and 1000 Threads

Hello everyone, I am new here and just wanted to take this time to say hi. My name is Victor I am an automotive technician from Boston MA, I'm really glad I came across this Forum it has deffinetly peaked my interest. With that being said... I do have a question. I am working on a project...

Im trying to calcuate the energy output of Saigtarius A star if it were to accrete material at the same rate as a typical Seyfert Galaxy which I understand to be about 1 solar mass per year (correct?). I am getting an answer that looks way too low. As I understand it we should get a number...

Hi. no output from 7905 when configured in high current mode and parallel transistor short circuit protection. please see the attachment for circuit diagram. the load connected to the output is 100 ohm (50mA).

Total Power output Sound! All right, nevermind, problem resumed. . A rock band has an average intensity level of 110 dB at a distance of 15 m from the speakers. Assuming the sound is radiated equally over a hemisphere in front of the band, what is the total power output? Relevant...

Hello!I'm working on an experimental alternating current generator project and need specific equations to calculate voltage and current output from a permanent magnet driven inductor, so I will have an idea what to expect before I commit real money to expensive materials. the only variables...

Homework Statement If f is a quadratic function such that f(0) = 1 and \int \frac{f(x)}{x^2(x+1)^3}dx is a rational function, find the value of f '(0). Homework Equations The Attempt at a Solution This question is presented in the context of learning about integration by...

Hello I'm designing a project and i need a sensor that can detect human motion.I would like to detect the output signal of this sensor by searching it via laptop or mobile phone as if they are searching for a wifi signal. I would like to know if such sensor is available or should i build a...

My dad is an electrical engineer, I am not. I am just a dumb race car driver. That said, I want to not ask him too much about all this stuff since I want to not look like a complete idiot. I feel that some of this stuff should be somewhat common knowledge, but alas, I am drawing a blank. I...

Hi I'm just thinking over a few things and realized there's something pretty fundamental that doesn't seem to get explained often or at least very well. Maybe I'm too much of a novice, who knows...anyway... When a power supply states a power output of say, 750W, what exactly does that...

Hi guys, I seem to still be having problems formatting polynomials in a standard way in Mathematica. I generate them randomly and would like them output using Print in a particular format. Say I have: theFunction=-2 + w^3 (-9 - 3 z) - 7 z + w^2 (4 + 5 z) + w (8 - 2 z^2) + w^4 (-5 z^2...

Say for example you have a Input Voltage in a circuit that is equal to Vin = 4cost + 5sin2t. Clearly, the input is operating on two different frequencies, namely w=1 and w=2. I am trying to find the Output Voltage across an arbitrary resistor in the circuit. The circuit consists of resistors and...

Hello, I am in the process of designing a voice activate control system for my truck for various things like wiper motors/windows/etc. The development board I am using will have up to 20 outputs @ either 5 or 12V DC around 10mA. However, this is not strong enough to drive a wiper motor or...

I would like to know the output voltage in this circuit at label A. (I am a beginner , sorry for stupid questions if any? ) The circuit setup is a sine wave source (ideal) in parallel with DC source series with a resistor. -Devanand T

This is actually a heat transfer question but what I don't understand is the electrical part of it. Given the current (in amps) and the resistivity (in ohm x seconds), how do I figure out how much heat is being generated? I would think you would need to know the voltage as well, but it is not...

Hi I am measuring the acceleration of an oscillating body with a triaxial accelerometer. I want to derive some kind of vector average of the 3 channel output. Someone suggested using x= √(a squared + b squared + c squared) ... where x is the vector average and a, b and c are the...

What are the various details and information (like particle size, crystal structure) that can be obtained and infered from xrd analysis of a copper nanopowder.

Hello Forum, I have a MacPro Apple computer. I just got a new power adapter rated 85 W. Does it mean that the computer is always drawing 85 W of power does is the power delivered depend on how many programs are open, etc...? thanks fisico30

Hello, the table below represent output values of a device which is connected to USB port: (device used is USB-6501) Its first time I see such output values and thus I don't understand the following: - What is push-pull ? - Negative current means that I should supply the device with such...

Homework Statement given the: Intensity = .026 W/m^2 Distance = 4.3m How much sound energy does the source emit in one our if its power output remains constant Homework Equations Pmax = sqrt ( uF(w^2)(A^2)) The Attempt at a Solution I don't even know where to start and that is...

Homework Statement Hello all, I have the following logic gates: (A'.(B+C))' which I had reduced to A+B'.C'. I then want use a NAND gate connected to a NOR gate, then connected to an inverted. However, I have been informed that I need not to use ten transistors, and that 8 can get the job...

Hi, I am running FindRoot on three variable system of three non-linear equations for a variety of parameters (four) and a huge range of parameter values. A simplified example is as follows: one parameter and one variable: I want to solve the equation f(x,a)==0, where 'x' is the variable...

http://img20.imageshack.us/img20/2350/qqqqmf.jpg http://img220.imageshack.us/img220/5246/transfixed.jpg I'm pretty sure I got the right system reaction. My problem is whether I got the right system output. Did I?

I was reading that i certain type of linear accelerator increases in output though time... why would this be? If anything i would have thought it would have been the opposite.. thanks

Hello Folks I have a program code in Fortran f90, that program generate an output file and put that into the same directory where the program resides, I need to put that output file in a network path ex: \\server_name\resource_shared I will appreciate if you could provide me the commands...

Hey guys, I'm attempting to use this chip, http://www.national.com/pf/LM/LMD18200.html#Diagrams with a simple 555 circuit as the input to drive an AC signal out. From my understanding I can have the 555 going into the PWM input, a relatively high current connection to Vs, this will then...

Homework Statement Sketch the output waveform for the given circuit and inputs (see attachment) Homework Equations For AND gate: x = AB (multiply the inputs to get the output) The Attempt at a Solution attached is my sketch. How to multiply 2 waveforms?

I am trying to solve 0.125 + 0.5 (1-x)^3 - (12.5/y)==0 for x, when y is real and y>0. I thus want to find x= 1- 0.63 ((100-y)/y)^(1/3), so that if y=100, x=1. Mathematica's Solve yields 3 roots: sol=Solve[0.125 + 0.5 (1 - x)^3 - (12.5/y) == 0, x] Root 1: 1.+((0.+0. I) y^(1/3))/(-100.+1...

Hi I have a wish to "create" a battery that I can use as replacement for a regular power adapter. Main reason I want to do this is to get something that will be mobile with my PC (HP Touch Smart) Input: 100-240, 2A, 50-60 HZ Output: 19V, 7.9A, 150W What technical solutions am I looking...

adult image hosting I am trying to calculate the output voltage of the circuit as viewed between the two nodes + - and then the equivalent resistance of the circuit looking into the two nodes. I have suppressed the voltage source to obtain Req=30k//30k=15k ohms. Vout=-3v. Suppressing the...

So, I'm launching foam balls using spinning wheels. The way it works is a sheet of polycarb is near the wheels. The ball is fed into the wheel and is compressed. The wheel turns and shoots the ball out. My question is this. How should I calculate the output velocity of the ball? I know the...

hi, i am facing some problem when i want to display several output in a listbox. i have a for loop to load the images from a folder, after the images loaded, it will gone through some calculation to get the average. if the images average <=10, then i want to display the images name in a...

Delay Circuit with "Logical-Quality" Output? Hi, First of all, hello everyone (my first post here)! I need to make a delay circuit for my car, but I need the transition time of the output voltage to be quick, because I will use the voltage to activate a power MOSFET transitor, which will...

Hi all. I'm feeling a little new here. Here's the deal. Question involving my micro-hydro installation. Pretty basic in this crowd I would guess but a chore for me, and am not sure the numbers I come up with end up making practical sense. I've been tinkering with it for years, but still seem to...

Homework Statement Given the following defined transformation T(a + bt+ct^{2}) = (a+c) - (c+b)t + (a+b+c)t^{2} find the matrix with respect to the standard basis From my understanding, the standard basis for a 3 element vector would be (0,0,1)^{T} (0,1,0)^{T}...

Homework Statement Problem is here: http://i.imgur.com/DrI08.png Homework Equations For D Flip-Flop: D = Q+ The Attempt at a Solution In red on the picture above, I have written what I think the output will be through the first clock cycle. Next state would be 0011, but answer...

A small steel wire of diameter 1.4 mm is connected to an oscillator and is under a tension of 6.3 N . The frequency of the oscillator is 63.0 Hz and it is observed that the amplitude of the wave on the steel wire is 0.50 cm. a)What is the power output of the oscillator, assuming that the wave...

Homework Statement I think it runs up to the couts I have in my input function but then it just crashes. I'm running it on DevC++. The code is in [b]3 along with the assignment link. It's assignment 11 that I'm working on and the text file is next to the link for the assignment. I would...

I need to connect the transformer to an 5V open-collector source as shown below, but the load must not see a larger impedance than 50Ω. The 5V source is an internal source to the driver and not available outside of it. As it stands, the seen impedance will be 5k when the bjt is off, so this will...

There are three speed control methods in a shunt DC motor - Field resistance control Terminal voltage control Armature resistance control In the field/flux control method induced torque decreases and speed increases due to decrease in flux, that is why power remains constant. This is what I got...

I had a 24V DC tractor cab heater that decided to let the magic smoke out shortly after hooking it up for this winter season.So,I checked the company website-DC Thermal-and they have the new improved models which claim to output almost 3 times the heat in BTU's.These are quartz type heaters.My...

This isn't exactly part of my homework but I wanted to know how I could save the output of this program to txt file? The program was my homework and it was to allow the user to enter the starting values for a multiplication tables columns and rows and print a 10x10table I did it like so...

I have produced a model in python demonstrating the Tonry et al (1999) model of infall towards the Great Attractor and Virgo Attractor however I can't seem to achieve the correct pylab graph output I am looking for. Firstly I would like to be able to plot the 100 output values all on the same...

Hi, I solved a differential equation using Mathematica using NDsolve, I get some solution, but I only know how to plot it in Mathematica. The problem is that I need the data - numbers - and I want to work with then a finally make the graph using gnuplot. Is there any way how can I cat...

I am using Mathematica to create a formula to solve for (Vs) in an equation shown at the top of the attached image. Using the assumptions shown, Mathematica outputs three possible solutions, all of which appear to be incorrect when I check them using actual values. I get this error when...

Homework Statement A cyclist coasts down a 7.2 degree hill at a steady speed of 10 km/h. If the total mass of the bike and rider is 75 kg, what power output must the rider have to climb the hill at the same speed? Homework Equations Power = Energy/Time Ek = 1/2mv^2 where m is the mass...

The concept of output impedance is highly confusing to me. I will be thankful if some body gives simple explanations to the following. 1. I undertand that in the case of current amplifiers, the out put impedance should be low and the input one should be high. In the case of voltage...

Homework Statement I've implemented RSA and just need to print some stats and write to files.Homework Equations My solution works fine when I provide an input file, however, if I let it read from standard input there is no output written to either of my output files. Reading works regardless. I...

Homework Statement In order for a car of 4000kg to travel at 10m/s with a frictional force of 400N, find the power output of the engine. Homework Equations P=Fv The Attempt at a Solution I found 40000*10+400*10=400400W, is this right?

My son is a 3rd grader and wanted to do a science fair project on solar cells. So we devised an experiment to see if reflecting light with a mirrow would increase power output. We constructed a circuit using an amp-meter, solar cell, and 10Kohm resistor. He hypothesized that reflecting sun...

Hi all, this is my first post here. I'm hoping some input will help me verify what I am missing. This is a question from an exam paper I'm doing for a module on introduction to semiconductor technology Calculate the CMOS inverter output voltage Vout, and the corresponding inverter current...