Output Definition and 1000 Threads

I am doing a math project. Our goal is to use Mathematica to design some small wind turbine blades, 3D print them, and then attaching it to a small dc motor. I did something very similar for science Olympiad, where we had been measuring the "power" by measuring the voltage between the two wires...

Homework Statement Vtn = 0.4V W/L = 10 NMOS1 Saturation Region Drain = 2.5V Gate = 1.9V Source = 0V Vtn = 0.4V W/L = 10 NMOS2 Triode/Linear/Ohmic Region Drain = 0.5V Gate = 2.2V Source = -2.3V tox = 9um un = 250cm^2/V W/L = 10 Homework Equations Saturation: Id = Kn * (Vgs-Vt)^2/2...

Hi, For my project I am plotting a Force vs Displacement graph using 2 analog inputs which are going to a DAQ. The two analog inputs are coming from; -A 5k potentiometer (for the displacement) -A 1000 lb load cell sensor (for the force) I would like to use a regulated 12V DC (1Amp) power...

I have a hydro turbine spinning at 62.746RPM and it produces 170.195Nm of torque. It generates 1.1183kW but ideally, I would like to step it up to at least 4.5kW. Is this possible using a gearbox and if so how can it be done?

I'm trying to plot the probability of error for the following equation using Matlab software, i want to use the command "trapz" for the numerical integration, the problem is that i get a fine shape for the plot, but the values in the y-axis are wrong, the whole curve should be between 0 and 1.2...

Hello, I have a strange request from a client. He has a "burn-off" which is used to burn bits of labels that are stuck onto his products, that's a bit vague, but it's all the info I have. The request is that he wants to be able to change the voltage going through the burn-off anywhere between...

I'm trying to simulate a boost converter using multisim. I get this waveform Why does it spike like that at the start ?, is it because of the inrush current ?

Hi, today I used 79L05 as the negative electrical level. The output filter capacitance is very large at first, just like the figure below: It is -12V. Under this condition, the chip is very hot,and the output voltage is just about -2V. I changed the 220uf to 47uf, then the chip worked well...

It should be possible to calculate the output voltage in millivolts of a pickup coil at a given frequency, based on the number of turns of wire, the wire resistance / meter, the inductance of the coil in Henrys, coil capacitance, the BH max in Joule, or flux density in Tesla, and volume of the...

Homework Statement A Verdant Power water turbine (a “windmill” in water) turns in the East River near New York City. Its propeller is 2.5 m in radius and spins at 32 rpm when in water that is moving at 2.0 m/s. The rotational inertia of the propeller is approximately 3.0 kg∙m^2. Determine...

Hi, guys I am very new to programming in fortran90 and I am just experimenting with stuff. I have been trying to get my output of my loop program to a text file. But for some reason it will not work. Could someone please advise. Code displayed below: PROGRAM loop IMPLICIT NONE integer ...

Homework Statement The circuit shown below is part of the interface of a relay output module. Ib is 1 mA and VCC is 9 V. The relay requires a minimum of 50 mA to energise. Complete the values of the assumptions listed below in order to calculate: • voltage across R1 • value of R1 • voltage...

This is probably a very basic engineering question, but I'm from an energy policy background and the resources I've found (such as this) are quite detailed. Internal combustion engines such as automobile engines and aircraft (jet and piston powered) produce more power in colder environments and...

Hello, guys. In field oriented control of ac machines, the electromagnetic torque is proportional to the q-axis current. We can control instantaneous torque by control the q-axis current. If the torque we want is a constant value,with PI controller, no problem, no steady error. But if we want to...

Homework Statement This is a problem of the 10-minute test we had today in school. Its written in Pascal and it is asked of us to analyze it and figure out what is the output when it runs without writing it down. Homework Equations 3. The Attempt at a Solution [/B] I wrote it in the editor...

Homework Statement A 49.0 kg sprinter, starting from rest, runs 58.0 m in 9.90 s at constant acceleration. What is the sprinter's power output at 1.90 s , 3.00 s , and 5.70 s ? Homework Equations ##d=v_it + \frac{1}{2}at^2## ##F=ma## ##W=Fd## ##P=\frac{W}{t}## The Attempt at a Solution I got...

Helly everyone. I'm new in physics and I don't understand many things there. What interests me the most is energy generation. I was mostly reading Wiki articles, and I found something I couldn't understand, so I'm asking for help. According to wiki, peak power output of the largest nuke ever was...

I want to detect whether potentiometer output voltage is increasing or decreasing and convert this to a digital signal. the circuit must be able to sense tiny voltage changes (order of 10mV) and with high speed. all I am interested is if Vout increases or decreases not by how much increasing V...

Homework Statement It appears to me that output load voltages in a Bridge Rectifier circuit with capacitor always seem to be greater than that without a capacitor. I'm aware that the function of the capacitors connected across output in rectifiers is to remove pulsation of the DC output, so...

# Use Dave's suggestions to finish your daysBetweenDates # procedure. It will need to take into account leap years # in addition to the correct number of days in each month. def nextDay(year, month, day): n=month if (n==1 or n==3 or n==5 or n==7 or n==8 or n==10 or n==12) and day < 31...

For a project I am doing I need to increase out put speed to 515 rpm from 1rpm with no more than a 20% decrease in torque, I need help I have been trying a lot of things and can't figure it out.

I am suppose to write a code that print put the url of a link given below. The url is defined to start where the first " appears and end where the last " url appears starting from the start_link. Its actually the last project from te lecture 1 in Udacity and the forst code of mine.. but its...

I am also constructing a small boat as a test bed for a much larger houseboat. If we forget about practicality issues... and accepting that my BS econ degree from the 60's isn't helping me much, I have a simple question with a difficult answer I guess. 2 stage centrifugal pump. (Standard...

Homework Statement A newspaper article stated that the NASA Galileo space probe to Jupiter 'contained 49 lb of plutonium to provide 285 watts of electricity through its radioactive thermonuclear generator (RTG)'. (Note: An RTG is a device for converting thermal energy produced by fission into...

Homework Statement So we just covered op-amps in class and when going through the lecture notes and reading the topic about ideal op amps, I came across this. It says that if the gain A is infinite(which it is in ideal op amps), the only way the output voltage v0 can remain bounded is if the...

Good evening, This Conversation is in regards to questions i have of a project of mine. I am, in a sense, looking to make a generator of sorts, one that uses a magnetic tesla turbine in order to power an electric motor. Unfortunately, i am at a loss for what formula i would need to figure out...

Hi all, It has been my nerd dream to have many screens to be able to see the same PC (Win 8.1)output in more than one screen. Other than the obvious way of having the same input in many PCs simultaneously, is there some other way of doing this, while having the option of doing basic functions on...

Homework Statement This is the code on Turbo C++ char * disp() { int a [ ] = {49,15,50,34} ; char c [ ] ="1234" ; for (int i= 0; i<3 ; i++) c[i] =a[i] + c[i]; cout<<c; return c; } void main() { clrscr(); cout<<" ,"<<disp()<<endl...

Homework Statement Given a sine-wave generator of frequency f having internal resistance R1 connected to a high-pass filter. If the generator shown in the dotted outlined box produces a voltage V0(t) = V0 cos(2π ft) with no load, derive an expression for the output voltage V1(t) = V1 cos(2π ft...

I have a hollow output shaft gearbox that will accept a 1-1/8" solid shaft, I want to extend the output shaft of a gearbox by 6 inches from the face of output seal to the end of the shaft. The manufacturer states that gear reducer is rated 899 lbs with the hollow shaft or a solid shaft that...

Hi, I am trying to understand the functional form of B3LYP from the Gaussian output file. I have tried to relate the details in the output file with the functional form of B3LYP. But I am not sure what certain terms correspond to. I have mentioned below the details. Can you pleaese help me. In...

Hello for an input signal with a noise we have and for obtain Power spectural density we use autocorrelation function where hkm is but I need to know what is autocorrelation function for different inputs with different frequencies? such as Any help will appericate

Hello all, I will be using a photodiode to measure optical power. The photodiode will convert this power into a current. The optical power will pulse rapidly in 15 ns periods with a 5 ns on-time (at full amplitude) and a 1 ns rise and fall time. I am looking for an analog averaging solution...

In a transformers output, is it the current that is fixed or the voltage? I have been trying to resisitively heat some tungsten foil and I am stuck at trying to find out the amount of current I need in my transformers output. The problem I am facing is that I know that the tungsten resistivity...

Homework Statement Both diodes are ideal. Answers: (a) Vi (b) -Vi (c) -2Vi (d) none of the above Homework Equations Q=CV The Attempt at a Solution 1. For t=0 to Pi: Cap1 and Cap2 are in series and hence Q1=Q2, therefore Vc1 = Vc2. From this we get Vi = Vc1 + Vc2, hence Vc1 =Vc2 = Vi/2. 2...

Problem: my photo diode receives pulses of width 10ns-150ns and repeating at rate of 1Hz-50KHz the current from photo diode depending on incident light can go from 10nA-100mA, in a nutshell, my application tries to digitalize the analog pulses for pulse width measurement so i have 'only' two...

As I found on many websites, they suggest to use Chop[]. I tried that already but it doesn't work. This is my output. {{2 (Conjugate[ I.0] I.0 + (Conjugate[I.0] + Conjugate[Subscript[v, 1]]/Sqrt[ 2]) (I.0 + Subscript[v, 1]/Sqrt[2])) Subscript[\[Lambda], 1] (Conjugate[I.0]...

I had a question regarding DACs. Can they accidentally spit out digital values? The output I am looking at seems to be fluctuating by discrete values and I was wondering if it was related to the DAC.

So say I have a PV-Thermal array and assuming standard test conditions. How would I calculate the temperature of the water coming out of the system? The thermal output of the system is 67.5kWp with a maximum flow rate of 65L/h. Approximately 500m of 3/4" pipes.

Homework Statement The full range input of a12-bit, successive-approximation type ADC is 1 volt. Determine: a) the maximum input change required to give a one bit change in output of the ADC Homework Equations None The Attempt at a Solution The ADC is 12 bit, so it will produce a...

Hello, We have a pressurized Water-jet stream, where the nozzle d= 0.8 mm. We can measure the fluid output in mm3/s, to determine the speed by dividing over the area. For this, F=ρAv2 However, the variable that would be changing, would be the distance from the nozzle to the target. If we...

Hello! (Wave) The production function of a company is $Q(x,y)=xy$. The cost of the production is $C(x,y)=2x+3y$. If this company can spend $C(x,y)=10$, which is the greatest quantity that it can produce?We want to maximize $Q(x,y)=xy$ under the condition $2x+3y=10$. We use the method of...

So, this is what I know so far, please correct me if I'm wrong. The amplitude of the output of a PWM inverter depends on how long the sinusoidal modulating signal is greater than the carrier. If you subtract the output (scaled down) from a reference signal in order to get some error and use...

I am doing a project where I need to control brightness of a led light. according to presence. the brightness can be controlled using pwm but I cannot find a way to do that for high voltage input signals.

Hi guys, not sure if this is the right place. Its to do with an electronic project I've been working on. However please point me somewhere else if you know anywhere better suited! (It is quite a long post sorry) Basically, I have created an LED array used for stimulating cells with light and I...

So when supplying this circuit, with a 200 uh inductor, http://cdn.instructables.com/FIY/EAZN/G9NH8XOG/FIYEAZNG9NH8XOG.LARGE.jpg with the volts and amps values, how can I calculate the output without having to resort to measuring the distance between starting arcs? And does anybody know the...

Homework Statement A steam power plant consists of a boiler, a turbine, a condenser and a pump. The temperature of the inner walls of the boiler is 350oC and the temperature of the condenser cooling water is 20oC. During a certain interval of time, the heat added to the boiler is 2.9x106 kJ and...

Homework Statement (The question is in the image attached) (c) An X-ray unit in the cardiac catheter labs has an output of 80µGy/mAs at 1 meter when the unit is set at 100 kVp. After adding 0.3mm Cu to the beam the photon intensity is reduced to a quarter and tends to vary in proportion to...

Hi, I have a problem that I've been trying to figure out for a while but cannot seem to get on my own. I'm trying to figure out how much power will be generated in a motor given a certain amount of torque. The problem is, to find the amount of power output , I also need to know the rotational...

Homework Statement I am not sure i know what is meant by the input load line and the output load line in parts b and c. I tried looking it up in my book (fundamentals of microelectronics by razavi) but to no avail. Any help is appreciated.