Output Definition and 1000 Threads

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: [SIZE="1"](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...

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...

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...

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...

A man runs up 1576 steps in 9minutes 33sec. If the height gain of each step was 0.20m, and the mass of the runner was 70.0kgs, what was average power output during climb? I used P=W/T & W=FD W=70kg(1576)0.20=22,064J P= 22,064J/573s = 38.5 W answer given is380W What am I missing?

Homework Statement The problem is gives an ideal op-amp and wants me to find the output current of it. Here is a picture of the problem. http://i.imgur.com/NfO6q.png Homework Equations vp=vn in=ip=0 The Attempt at a Solution So what i did is take KCL at the Vn node...

Are photons in the laser output beam mutually independent and can the multi-photon output be described as the tensor product of individual photon states?

I am trying to model light that (1) exits a multimode fiber (2) passes through a cylindrical lens system and (3) enters a multimode fiber (and yes I know that a cylindrical lens system is not ideal for fiber coupling). The radius of curvature for each of the cylindrical lenses in my system...

Homework Statement Here is the problem: http://img507.imageshack.us/img507/6488/unled2b.jpg What is the open circuit output voltage, Vout? Estimate the short circuit output current Can someone explain to me how to do these. Homework Equations Honestly... no idea. I know V=IR and all that...

[FONT="Arial"]Hi Shaft A has variable RPM, getting input from some rotating element (say X), ranging from 0 to 2000. The RPM of X cannot be adjusted or controlled. A has to transfer the rotation with limiting RPM of upto 400 to Shaft B. Is there a way to limit the RPM using a mechanism...

We were assigned a problem in class, but because it was on guest lecturer material, I am unclear of which given numbers and what equations to use. I do know I am supposed to use: η=TH-Tc/TH But I am confused as to why I have been given 4 variables ...Please Help! Here is the question [1] You...

Hi, I have a questions about generators and how they generate electricity. Why is that some generators generate large electrical power running at 3600 rpm, and yet some generate little electricity running at the same speed? And why are low rpm generators (e.g. 900 rpm or less) able to...

Hi all, I'm writing a program in FORTRAN to calculate neutron flux in a reactor, but when I try to get a numerical output it simply says NaN. Anyone know what this means or how to fix it? Code is below, and this is happening on the flux2(N) output on the last write statement. Thanks...

Homework Statement : Q.If a power plant burning 10,000 metric tons of coal per day with 10% excess air emits stack gas containing 100 ppm by volume of NO, what is the daily output of NO? (Assume coal is pure C). The attempt at a solution: A. C + O2 → CO2 (10000 metric tons of C)...

Is it safe to loop the inverter's output neutral to loop with the mains neutal?? Guys, I need a help on this. I thought that it is rather safe to loop one of the output terminal of the inverter to loop with the mains supply inverter, so that there doesn't arise the need of extra neutral wiring...

Homework Statement Humans have about v = 60 cm3 of blood per kilogram of body mass and blood makes a complete circuit in t = 20 s seconds. For a human body of thickness 0.2 m and height 1.8 m, estimate the change in power output of the heart when the body is standing up on a horizontal...

I'm currently studying transistor amplifiers and It is not entirely clear how impedance relates to amplification. For the emitter follower configuration, the book I'm reading implies that low output impedance means high voltage gain and, for any amplifier in general, high input impedance is...

Hello. I am a physics student working on research project which involves Fortran 95 code. I am very new to Fortran but I do have an intermediate knowledge of Java. The task I am attempting seems like it should be very simple but there are many subtleties to learning a new language that are...

Hi all, I have a problem with a VSD at work that's been confusing. I am a field service engineer for an oil service company, my line of work is in electric submersible pumps (ESP). The ESP motor is a 3 phase induction motor. Power here is 380V 50 HZ.We were using a VSD for motor control. The...

the general form of state space output is y=cx+du which means that output is linear combination of state variables and inputs my question is can we write output in this form when our output is not combination of state variable for example in rlc circuit state variables are vc and IL now if we...

Homework Statement Hello all, there has been some debate in my class as to the output waveform for the following circuit: Others say that the output will always be zero.

Hi, I am doing my Extended Essay in Physics(so yeah, I am doing the IB). I am really interested in taking up electrical engineering at university, and so, I had done an EE in piezoelectricity. I have taken the crystal from a barbecue lighter and connected it to a vernier( a machine that can...

I have a problem i am trying to solve, the question is; Calculate the velocity ratio for this system. If the work put in is 3000J, calculate the useful energy output. The system in question is a Hydraulic lifting frame upon which crates are placed. It is lifted with a hydraulic ram which is...