Output Definition and 1000 Threads

Hello. I have a question about Mathematica. I have a series of files named P1.txt, P2.txt, etc. Each file contains 200 pairs of coordinates [x,y]. I want to write a loop that would import each of these files in turn, process them with NSolve, and then export the output files as Q1.txt...

Homework Statement How do you measure the output of a voltage divider with real voltmeters that have effective resistances Homework Equations The Attempt at a Solution I know that for an ideal voltmeter (one with infinite resistance), the voltage divider is R2/(R1+R2), but I...

Hi guys, I'm new to the forum, I'm a mechanical engineer but running a project a little outside my comfort zone which is to do with optics. I am trying to calculate the power density of a pulsed Nd:YAG laser but am getting in a muddle with the Average and Peak powers. The project is to model...

suppose an amplifier with V+ is 2.5 volts and V- is not connected...V- and Voutput are connected by a resistor. what is the voltage on the outpout of the op amp?

hey guy I was wondering if there was any way to increase the amperage output of an ac to dc converter, it is a 120v ac input that outputs 13v dc at 3.42 A. is there any way to boost this output? P.S. Ya'll are the best, This is by far one of my favorite places to be on the web. kudos on a job...

Hey Guys, Does anyone have a general idea of the circuit needed to generate a composite video signal?

Hi there, I've been puzzling over the following code (which works in serial). It produces radically different answers if the (blank) WRITE(*,*) is included or not. Any help greatly appreciated! eps = 0.0 !$omp parallel do default(none) private(i, j, current_angle, current_energy) &...

Homework Statement Draw the path of two parallel incident rays in a beam expander composed of two convering thin lens, with the first lens having a focal length less than the second one (f1 < f2.) Kind of what the problem looked like. The distances between the two parallel rays (the beam...

Homework Statement I have polynomials of the form: x1 + x2 + x3 + x1x2 + x1x3 + x2x3 + x1x2x3 The x's can be a combination of 1s and 0s, so all the possible inputs could be written as strings: 000, 100, 010, 001, 110, 101, 011, 111 The polynomials can also have coefficients a...g, so...

Homework Statement Input and system response is as follow: x[n] = r[n] - 2r[n - 1] + r[n - 2] h[n] = \delta[n - 2] The output is: y[n] = u[n - 3] Is that true? Homework Equations The Attempt at a Solution I draw the h[n] and x[n] and they looked as follows: As for...

Homework Statement The hot reservoir of a heat engine is steam at 100 Celsius while the cold reservoir is ice at 0Celsius In 1.4 hours of operation, 12 kg of steam condenses and 60 kg of ice melts. What is the power output of the heat engine? Homework Equations Efficiency =...

greetings, when a transistor in common emitter configuration is given a ac signal with base current,the amplified output form from collector of it gives inverted polarity of the input voltage or the output graph of voltage versus time gets inverted of input graph of voltage versus time.how is...

What is the output of the op amp when either Vcc or Vee is not connected. I simulated this and got Vsat. +Vsat when Vee was missing and -Vsat when Vcc was missing. But I don't know why the output saturates to +Vsat, even in a inverting configuration. Shouldn't it go to ground, since the...

Homework Statement A 39.5 uF capacitor is connected to a 47.0 ohm resistor and a generator whose rms output is 25.2 V at 60.0 Hz. Calculate the rms current in the circuit. (also asks for voltage drop across resistor, capacitor and the phase angle for the circuit, but I mostly want to get...

I am trying to set up some realistic conditions for a game I am designing, and need a bit of help. I am speaking very generally in this context. What are the percentages of mass released as usable energy in a uranium fission reaction, a D-T fusion reaction, and a positron-electron annihilation...

Generator output question... Hi there, If I were to drive an electric generator from, for example, a 200Kw petrol engine, would the output of the generator also be 200Kw, or would I loose some power along the way? And if so, why? Many thanks.

Hi, This is my first post on this forum, just joined. I recently purched the S3 Spyder III Arctic portable 1W laser from wickedlasers. I bought it to try and make some cool photographs and photoshop them. After testing the device (glad I bought safety goggles with it) I was wondering how hot...

An object with a mass M is rotating around an axis, with an arm of radius R at a certain speed V. Assuming that the movement is constant, and a 100% efficiency, how many watt of electrical power can this device generate ? For example purpose, we can take M=60 kg, R=5 meters and V=10 meters...

Homework Statement Thought it'd be easier to post the problem statement rather than writing it down again.http://imgur.com/TE2kN.png" The Attempt at a Solution I'm trying to get b and c. For b I have: \frac{mgd}{\Delta t_{one flap}}=\frac{\frac{1}{2}m(v_f ^2 -v_i ^2)}{\Delta t}...

Homework Statement The hot reservoir of a heat engine is steam at 100^ C while the cold reservoir is ice at 0 C. In 1.3 hr of operation, 11 kg of steam condenses and 52 kg of ice melts. Homework Equations I think power output is W=Qin-Qout The Attempt at a Solution I believe the...

Homework Statement Hi. Just like the title says, why is the output impedance of an op-amp so small? (as in physically, I understand why a low output impedance is a desirable characteristic)

how to see the output of a file operation? eg void main() { int a; cin>>a; ofstream o("a.txt"); o<<a; o.close(); } does the text file "a" come into existence? can we open it?

Homework Statement Trying to create an excel spreadsheet that outputs the angles of a simple pendulum as it slowly comes to a stop. Homework Equations so I've used the formula: θ(t) = θ0cos(squareroot(g/R*t) where: θ0= inital angle g=gravity constant R= length of string t=time...

While I know there exists: In[1]:= Timing[Integrate[blah]] Out[1]:= {result,time it took to calculate} Is there a way to just have the time it took to process a step appear in the Out[1]:= part, or after every step rather than having to use the Timing function and then pull out the...

I have a high pass filter circuit, which I've designed from a transfer function, and from the Bode Plot, I'm getting some amplification, yet I don't want that. I just want my input=ouput at the frequency where amplification starts. How can i go about to do this? Should i introduce another...

Hi everyone, i have a problem with mathematica. I am supposed to compute the eigenvalue of a matrix, and I need the expression for the eigenvalues analytically. But it output strange symbols. and I am unable to decipher what it means. What I got is an output consisting of words like root and...

I have attached image. Thanks in advance.

I have a engineering question that hopefully you guys find interesting enough to help me with. It works as follows. I have a steadily moving column of water moving at 1.4m per second. I have two water wheels with diameter of 2000mm and 3000mm. Each wheel has 5 flat boards which measure...

Homework Statement What causes the output distortion seen in the above diagram? Output on right, input on left. The Attempt at a Solution This isn't homework, just something I can't figure out, playing with a simulator. The gain here is dependent on the input voltage... but why is the output...

1.)what is the power output of a 1200kg car that can go from 25 km/hr to 100 km/hr in 12 secs. Neglecting air resistance and rolling friction. 2.)a woman skis down a slope 300ft high. her speed at the foot of the slope is 60 ft/sec. what percentage of her initial potential energy was dissipated?

How do you determine the output impedance of cmos gates?

If I produce two different sets of data with ode113, that are based on the exact same inputs, but one is longer than the other (i.e. tf is larger for one set, we'll call it A. Both A and B have the same ti). If I compare the two plots with imagesc(A) (so that the vertical axis represents the...

Howdy Yall, First time poster, long time lurker. I am working on a project right now measuring the "useful" life of a battery...say a AA battery. To relate that to a real world application, I will be powering a light (LED) off the battery. I was initially planning on getting the battery, an...

NM-Solved(How to plot points from a "Maximize[ ]" output) Hello all, I'm working with some data sets and I want to make a bar-type graph out of the numbers that result after a series of equations ending in a maximize function. My trouble is that the output of the function gives something...

Hello all. Does anyone have any experience in viewing the more detailed output from NWCHEM? It's easy for Gaussian or GAMESS where the outputs themselves are inputs for molden or other programs, but for NWCHEM you have to specify in the input file exactly what sort of output you want for the...

Hello, I want to know the answer of following program and the reason behind it...as soon as possible void main() { float j; j=1000*1000; printf("%f",j); }

Hi all, I bought a small gearhead motor for a uni project, however the shaft is a strange shape. Round for the most part with a flat section. Not sure how I'd connect it to something? I could use glue I guess but would prefer a cleaner solution. Is there washers/couplers for these type of...

Hello, Am trying to make dc/ac inverter with pure sine wave output, while am searching i found an IC which is SG3524 which can generate a pwm signal. Is it a good choice for pure sine wave output, and what is the difference between the pwm signal generated by micro controller and the pwm...

[b]1. Homework Statement A voltage divider consists of two 56kohms resistors and a 15V source. Calculate the unloaded output voltage taken across one of the 56kohm resistors. What will the output voltage be if a load resistor of 1.0Mohms is connected across the output?

Can you tell me if I'm right with this. If you charge ten 1F capacitors in series at 10 volts. Each capacitor has a voltage of 1 volt and a charged capacitance of 0.1F. So if you discharged the ten capacitors in parallel the output would be equal to 1F of capacitance charge and 1 volt. or would...

I have a short code that calculates the running median for three columns of data in an input file and writes the running medians out to three columns of data in an output file. I use Numerical Recipe subroutines and functions to compute the running median. If I include a WRITE(*,*) directly...

Dear All, We have an voltage amplifier. The input is given in small square wave steps to check rise time and noise level of an output signal. The rise time looks good, but we see periodic (noise)oscillations after reaching the plateau. We measure signal voltage across capacitor (10 micro...

Hello all; I'm doing work for my job, and I've forgotten my statistics =(. I first want to know if what I'm trying to do is possible. I want to create a linear regression of the form Y = a * x1 + b * x2 + c. http://imgur.com/Q4vGP" As you can see, there is space that is grayed...

Howdy, I am a mechanical engineering student with limited circuitry knowledge to start... Anyhow I have a [-500,+500]lbf load cell that is essentially a wheatstone bridge strain gauge. I want to give it either 9Vdc or 12Vdc excitation voltage since I have a regulated power supply that can...

Which of these have higher output per square unit*, phototransistors, photodiodes or APD photodiodes.?

I have discovered the solution for the differential equation. I have: DSolve[{y'[x] == 3 + 1/x}, y, x] and got {{y -> Function[{x}, 3 x + C[1] + Log[x]]}} I'd like to make y a function of z, for example. I just would like to be able to use the function another time, evaluating y[2] for...

Hello everybody! I've got a Mathematica problem that I've been working on for a while but can't seem to solve. My code is pretty involved, so I'll simplify the dilemma for you. F1 := Function[{x,m,b}, y = m*x+b; Print[y] ] I have a function called F1. If I call it like...

Hi All, Its my first post here. I want to know how the digital output which comes out of an ADC can be used to calculate FFT. Because FFT algorithms usually needs real and imaginary parts of a sampled signal? Thanks.

Homework Statement For the circuit below (attached) plot the amplitude of AC voltage across resistor as a function of the angular frequency of the ac source. Homework Equations ZR = R The Attempt at a Solution I'm not really sure about any of this. Across the resistor, the complex...

Homework Statement what is the average power output of an engine lifts a 250kg mass a distance of 30.0m in 20.0s? Homework Equations Ek= (1/2)(m)(v^2) Ep=mgh Ew=fnet x distance Es= (1/2)kx^2 The Attempt at a Solution Ep+Ek=f x d (.5)(200)(3)^2 + (200)(9.81)(5)= fx5.00...