Input Definition and 619 Threads

Homework Statement Insulated piston-cylinder device contains 5L of saturated liquid water at constant pressure of 175kPa. Water is stirred by a paddle wheel. A current of 8A flows for 45 minutes through a resistor in the water. If 1/2 of the liquid is evaporated during the constant...

I am trying to create a program that would register it in a variable, when loudness of the microphone input signal exceeds some level for some amount of time. IS there a VB6 command that can allow me to measure the loudness of the input sound signal? Not on the sound card input. I have a...

hello everyone, as a theoretical PhD student I came up (I'm sure I'm not the first ;) ) with an idea. Many times for our work we spend a lot of time just rearranging or making substitutions in quite long equations (I think about the Virasoro algebra in this very moment :D ), something that...

Hi all, I am working on finding a programmable regulator circuit that can produce 0-12 volts for a power amplifier. It needs to be linear, with a DC input and control voltage so that a PC can be used to generate an input profile.

hi! I've started making my own games in Borland C++ 5.0 I want to learn how to detect the user's input of arrow keys (for eg. when a user presses UP,DOWN ,RIGHT or LEFT) Can somebody please post a short tutorial on detecting arrow keys? Thank You Ephysics PS- Is this correct ? int c =...

Homework Statement A wheel with rotational inertia I is mounted on a fixed motionless axle. The singular speed w of the wheel is increased from 0 to Wf in a time interval T. Net torque=IWf/T What is the average power input to the wheel during this time interval? Homework Equations...

Hi, I have seen the solution to the diffusion equation written as C=(N/sqrt(4PiDt))exp(-x^2/4Dt). Hoever, as I understand it, this is for an instant input of N material. I want to express the concentration of substance at a point x away from the source for an arbitrary input signal. Is there...

hi I have a guitar hero world tour drum and it is only powered by 2 AAA batteries. Basically, I want to connect it to the wall by connecting a AC to DC adapter (110 to 3V) and connect a DC input to the red/black wire that was on the battery compartment. Is it possible to do that ? I will...

I am in a C++ class, programming a command line utility, and I can't figure out how to open and read from an input file in xcode. any help?

okay so input force is the amount of force that is put in right? so you can find that by using the formula force = mass x accleration... but then what is input work? work is the result of force... but then wouldn't that be output work? i don't understand teh concept of input work... what is...

Hi Can someone help me on how i can calculate the input common mode range for this pmos diff pair. I'd have an idea if it was an NMOS diff pair but am kinda uncertain of this. I'm looking for equations for the input signal ranges of Vmax and Vmin Thanks

"invalid number: incomprehensible list input" ERROR Hello, I'm beginning to code in FORTRAN 77 so be patient please. I'm trying to read a plain text file (*.txt) which has 6000+ rows and 56 columns, this is the code I've been written so far: program segmente implicit real*8...

Hi, I am writing a program where I have the user input the name of two previously created vectors, the computer subtracts them and then generates a variable in the workspace. I was wondering if there was a way to let the user pick this name. I have so far (Y and N have been previously defined...

Hello Can someone help me with this? I've been struggling with it for some time and haven't found a solution yet. Let's say we have the circuit in the attachment. There is a number of inputs (4 in our case) and an equal number of outputs. The problem is: if at least one input is HIGH...

Alright, so my current class assignment is to create a program that will read several accounts, whether or not its a savings, the amount in the acocunt, then make calculations for interest and fines based on that info. The setup for the input file is like this: account checking/savings amount...

Certain questions involve finding input resistance for circuits (e.g. inverting or non-inverting configuration). I know ideally the op-amp has infinite input resistance but i don't know how i would be able to calculate the input resistance for non-ideal circuits? Thank You.

ATI Radeon 2900 XT "No input detected" My ATI Radeon 2900 XT 1GB will not send input to the monitor on booting the computer, but this was not always the case. The first sign of trouble came about a month ago when I was playing Left 4 Dead, the input to the screen went off as the map was...

Can anyone tell me how to calculate the common-mode input range of an instrumentation amplifier with all op-amps biased from +15V to -15V assuming all op-amps can swing rail to rail. Thanks.

Hello all. Wondering if anyone knows of or makes use of (idle's in, most likely) any Mathematics centered channels on IRC. I'm self-studying at the moment, and suppose that discussing matters in real-time would benefit me. Thanks in advance.

Homework Statement An ideal diatomic gas, in a cylinder with a moveable piston undergoes the rectangular cyclic process shown below. Assume that the temperature is always such that the translational and rotational degrees of freedom are active but the vibrational modes are "frozen out". Also...

Homework Statement An experiment to monitor the sound level in a room is to be conducted using a microphone. The microphone (output impedance = 1 kO) produces a maximum amplitude of 5 mV when connected to an oscilloscope (input impedance = 1 MO). If RI = 1 kO what amplitude will the...

Hi, This is gokul, am basically from biology back ground. Now am learning C language myself. I want to do a program that prints file on the screen given file name as input using FILE. Can anyone help me..

Preface: This homework assignment was due long ago. At this point I am only trying to understand the problem (or really if the posted solution follows the problem) before my exam. I have no real indication that this problem (or even one like it) will be on my final, but I feel that my inability...

Hi All I am wondering does anyone know the voltage limits of standard mux such as 74151A. I aim to place diferent voltage levels into the mux and select one input as the output that will go to an ADC. The voltages will be of increasing values i.e 4V, 8V, 12V 16V etc. Is 16 Volts too much to...

Hi, I have a question about the FFT. I'm starting to learn the concepts behind it, but I'm struggling at this one particular thing... Ok, let's say you have this diagram. http://www.ece.uvic.ca/499/2004a/group05/image/radix2.jpg Can someone explain to me exactly what "N-point" means? Also...

Hi I have a question regarding an ACTUAL Differential Pulse Code Modulation system setup. The prediction algorithm is predicated upon the assumption that an input to it is a correlated signal, and the objective therefore is to reduce redundant information when it is sampled at rates higher...

I have arbitrary input numbers, and an arbitrary output. I want a program to automatically give me a function (various constants and mathematical symbols) to convert from the input to the output. What's the best way of doing this? Are there any programs to do this for you, perhaps which use...

when i got a normal struct variable code: struct human { char name[50]; int age; float height; }; struct human TR = {"Tony", 12, 1.5}; \\this works but when my object is a part of an array and i take just one object the same data input method doesn't work why is...

Hi everyone, Maybe it's useful for someone who are not familar with latex but want to enter complex formulas. I suggest a new way to insert latex formated equations. I use LYX (www.lyx.org) ,it is a open source Latex WYSIWYG word processor. It will display the the latex code in another...

Homework Statement Water flows into a nozzle at 3.00 m/s at a pressure of 1.31*105Pa. What should the ratio of input to output diameter be if the flow is to remain steady? What is the flow speed at the exit? Homework Equations P_{{\rm{input}}} + \frac{{\rho v_{{\rm{input}}}^2 }}{2}...

Homework Statement A 0-10 V, 10-bit A/D converter displays an output in straight binary code of 1010110111. Estimate the input voltage to within 1 LSB (Least Significant Bit). Homework Equations Resolution = Efsr/2^M. (where M= 10 in this case) Eout = X/2^M (where Eout is the...

Matlab- input arguments of type 'double' ? Hi there, I was wondering if anyone could help me. Yesterday I wrote the command [z,r]=ode45(@rad03,[0,10],0); and it worked but today I am writing exactly the same thing but keep getting the message: ?Error using ==>feval Undefined function or...

Hi all, Can someone please help me with my MATLAB code. I am trying to get the program to quite if the user tries to input a non-numeric value, and will display an error message. I have got it to work useing the MATLAB input('promt','s') command, but i don't want to use this command because a...

I want to make a overvoltage and undervoltage protection circuit. Overvoltage should trip at 460VAC and undervoltage at 180VAC. Any idea how to implement it.

I need help writing the code for a simple lottery machine. Here are the key points. Ask the user to choose 3 numbers between 1 and 20. Randomly generate 3 winning numbers that are between 1 and 20. Determine how many, if any, of the users numbers match the winning numbers. If (hypothetically)...

Dear Friends How can I input a series of datafiles into the Gambit preprocessor package? Let assume that these datafiles contain 2 columns representing the points of a 2D curvature. There is no text header above the column, and datafiles are available in both *.dat and *.txt extensions. Also...

hi everyone, I have recently started studying abvout control engineering, but am not getting a grasp on the basic idea behind controls. All the textbooks say that the output should track the input ideally , but why is it so? i.e if i give a step input to a system, the response should ideally...

Homework Statement Can anyone tell me what input impedance is? The context is "...these two solenoids act as a transformer. An AC voltage Vexp[jwt] is placed across the first and a resistor R across the second. Show that the input impedance of the first solenoid is equivalent to a circuit...

I can see the lack of input is frustrating, i too am so frustrated about the lack of testable results, but that is of no concern, so long as there exists a way forward, what is the way we should go?

htp://s290,photobucket,com/albums/ll279/transgalactic/?action=view&current=IMG_8838,jpg the main problem comes when in one input i need to divide the number by 2 (subtract a zero from the original input) while in other control input i need to multiply by two (which meens to add a zero to...

Default How To Implement This Function With 2 Input Nand.. (+) =XOR F(w,x,y,z)=(w'+x'+y')(+)xyz i tried to : F(w,x,y,z)=(w'+x'+y')(+)xyz=(w'+x'+y')' *(xyz) + (w'+x'+y')(xyz)'= =(wxy)(xyz)+(w'+x'+y')(x'+y'+z') .. .. in the end i get =wxyz+w'x'+w'y'+w'z'+x'+x'y'+x'y'+y'+y'z'+y'z'...

Okay, so I am trying to use the breadboard and I have a hard time with a three input AND gate. Guess I can do a schematic http://imageiso.com/out.php/i17298_3inputandgate.JPG So in my bread board, I have pins 1 and 2 as inputs..with pin 3 as a LED (output), and I have a jumper connecting...

I'm pretty ignorant when it comes to statistics, so I'm hoping that there's an easy answer to my question (this is the good part of ignorance): If I have run a set of Monte Carlo simulations of some process, where I have some set of input parameters that I've drawn from known distributions...

Hey all, My 12 year old son wants an email account. We discussed some basic rules which he agreed to so I told him I would hook him up with gmail. The youngster for some reason balked at gmail and insisted on msn hotmail. I told him I would look at the merits of each and decide. I use gmail and...

Why floating input is considered as HIGH in TTL based logic ckts ?

Homework Statement Using basic gates and/or building blocks, design a logic circuit that takes in a 4 bit input and will compute the number of 1s in the input. Homework Equations The Attempt at a Solution I have no idea where to start can anyone help please.

Hi, I've posted another thread asking for general help on how to solve numerically with excel. Here is my specific situation if anybody is well versed with Mathematica programming. I'd appreciate any help. I've successfully created a FindRoot to solve eqn's for one set of data points...

Hello people I am trying to revise for my exam next week..I have searched everywhere but still I can't find how to calculate input resistance,stage input resistance and output resistance of a class A common emitter amplifier. any help will be highly appreciated. mathslova

Hey. As the title dipicts, is there any relationship between CFM and PSI, linear or non-linear? Any mathamatical relationship either? CFM (cubic feet per minute) is a volume over time, and PSI (lbs per square inch) is a weight essentially over an area. So I take it, there's no real way to...

I have a pioneer kdc-217 stereo for my car. Currently I use an fm transmitter and it works fine but it is just a hassle to get out and I get some interference. I found a link online on how to add a aux input by basically soldering a 1/8 inch jack to a chip that has a right line and left line...