Output Definition and 1000 Threads

Homework Statement I'm having trouble understanding part C of this question. Homework Equations ΔVo = Vout/2fRC The Attempt at a Solution So to get ~12V at the output, the turns ratio should be 14 because 120√2/12 = 14.14. Using a turns ratio of 14, the output voltage will be 12.12 V. To...

Homework Statement I have a question that involves comparing the energy output of a laser to the energy required to make tea. I've already calculated the energy to make tea and I know what to do to find how long it takes to make the tea but I'm struggling with the energy output part. It says...

http://www.sciencemag.org/content/350/6256/76 [ The concept is that the impact increased the lava flow markedly. So the ecological impact of the impact was extended over a longer period of time by the vast lava outflows for several hundred thousand years.

Please help how Ve is calculated what i think is that it should be: -Ve=-Vee+IeRe; How Ve is taken positive please someone draw equivalent circuit for same

Homework Statement Homework Equations V=IR For resistors connected in parallel, 1/R =1/R1 + 1/R2 +... The Attempt at a Solution I first calculated the resistance of the the cable which consists of two wires, 1/R= 1/0.0050 + 1/0.0050 R = 2.5x10^-3 x 800 = 2 Ω Then I calculate the voltage...

Is the analog output a voltage, current, or a signal? I'm kind of confused.

Hello! I have a science investigatory project issued by my school. For my (actually our) project, we decided we will make a some sort of concept alternator powered by water collected from rain. Our goal is pretty small, to power up a small 5-volt bulb. Assuming the rotor rotates 2-3 times a...

Based on a force inputed in a machine, how do you calculate the force outputed? I would have thought you could do this with a simple torque balance but this does not always appear to be the case. For example in the case of an accelerating bicycle, the force applied to the rear gear is Ft, but...

I am having a difficult time solving the question in Step 2 of the attachment. The question is "Use the equivalent-circuit model of the uA 741 to find: The voltage gain Av=vo/v1, the input resistance R1, and the output resistance Ro of the amplifier circuit. Attempt at solution: I used the...

I am curious as to whether a nozzle at the end of a pipe that is completely submerged in water and has a pressurized flow being pumped through it in a closed condition can increase the amount of flow and pressure of the water in a pipe fixed to the exit side of that nozzle if the nozzle uses the...

Homework Statement Homework EquationsThe Attempt at a Solution This is my load voltage output from my digital scope. From the digital scope , my output voltage is 25.0007V but how do I find the ripple voltage from the given data?

Hello Why does Mineral Insulated heating cables have such limited power output per feet and maximum operating voltages? I thought it has to do with the dielectric strength of the MgO, that is used as an insulation in the coaxial cable, but the dielectric strength for MgO is higher than the...

What output does a 12v motor give. I need to power a heating element that requires 12v, can I do this with a 12v motor? If not what size motor do I need? Thank you in advance for any help Sarah

Hi, I am in the process of restoring the brakes a 1974 Porsche 914 and upon reading up on a Porsche forum found a discussion about changing the original 17mm brake master cylinder with a 19mm one. A number of individuals indicated that doing so would reduce braking pressure and I was unclear as...

I figure my 2.4 liter Volvo will burn about a liter of gasoline over an hour of idling (source: Natural Resources Canada). Since a liter of gasoline contains roughly 33.8 million joules (~9.4 kilowatt-hours) of energy, I figure that that means my car idles at a power output of around 9.4...

Hello all, The root problem is that I can't put all my analogue inputs onto one input card (each card has 4 inputs) on the project I'm working on. We have four sensors, they should all output 4-20mA. Two are source type outputs, supply voltage goes in, sensor current comes out, current is...

Hi there! I am currently building a simulation to model the propagation of radio waves in seawater in terms of its propagation loss. I have previously discussed the models I've looked at but have settled on a model which depends primarily on the propagation distance ##r##, the carrier wave...

... it's amplitude exerts. During cavitation a sound wave is applied to a liquid and breaks it apart and gas pockets are formed. The frequency and the amplitude of the sound wave effect the bubble/s. My question is, if I have the power output of the device then how would this relate to the...

I'm setting up an amplifier which is intended for use in a car, and I'm not using it in one. I'm trying to power it through a typical DC 250 volt wall outlet. What kind of transformer should I use? (I'm also trying to power a car stereo with it as well)

implicit none character*4 head1,head2,ext character*10 fn1,fn2 integer i,kev head1='jack' head2='jill' ext='.dat' do i=1, 50000 kev=int((i-1)/50)+1000 if(mod(i,50).eq.0) then write(fn1,'(a,i4,a)') head1,kev,ext write(3,*) fn1 write(fn2,'(a,i4,a)') head2,kev,ext...

With the increase in RPM could the electric out put of a generator be increased.

What is the basic reason of unbalance output of an inverter, even the output connection is open and the IGBT is ok. Can anybody tell me what is the problem? Co operation is always encouraged.

Hi could anyone please help with this:- I have a 12V 90Ah automobile alternator. is there a way to increase the output volts beyond the 14/13.8v to say 192v?

I know that the power of an engine is equal to (rpm*torque)/ 9.54 (SI units). But does this mean that an engine when turned on is outputting the same amount of energy per unit time, every time ? . What happens when we press the gas pedal, does the power output increases? When i drive my car...

Homework Statement a 0.25 kg piece of ice at -30°C is warmed by an electric heater and the following graph of temperature is produced. -use the information on the graph to determine the power output of the heater the graph shows that the ice went from -30degC to -10 degC in 150s Homework...

Hello, I'm trying to build a hub to connect several circuits that have a PIC microcontroller and be able to select one of them and download the program to it. The circuit that I have in mind to select and program one PIC microcontroller is this...

I've recorded the output hiss from a small battery powered radio operating inside a metal tin. From related posts, I can say that the radio is effectively shielded from receiving any FM transmission, and the resultant hiss is thermal noise in the early stages of the receiver. I believe that...

Hi, my C++ course has started since last week and I am learning basic input and output. In my simple project, I have a function that will return a double number like this double getLong(long long ll) { return ll/10.00; } The input is 12345 and the return value after the code is executed is...

I have written a C program to trace out the motion of a double pendulum, but am having difficulties in getting gnuplot (controlled from my c program) to trace out the paths of the masses (example video below). Thus far I have created the program such that it produces a number of png images at...

I've been reading up on lasers recently and learned that within the cavity while the laser light is amplified by the gain coefficient, it loses power due to transmission and absorption. Suppose the pumping radiation comes from a monochromatic source whose energy is not exactly equal to the...

Hey all. I have a question regarding the solution to a question, both shown below (only part of the solution is shown). Specifically the line that states: H(Y|X) = H(Z|X). Why does this equality hold? Expanding and using the definition of entropy, I can see that for the above equality to hold...

Homework Statement I've been asked to solve a problem where a bathtub is being filled at a constant rate, meanwhile water is draining out continuously. The bathtub fills with a constant flow rate of \frac{dI}{dt} and drains with a flow rate \frac{dO}{dt} which is directly proportional to √h...

Homework Statement design a common-emitter amplifier with an output impedance of 4.7kOhms and again of-10 using a transistor with a beta=200 powered by a 12V DC supply. Homework Equations v=ir The Attempt at a Solution ------------------------------------------------------ rest of the...

In a common emitter amplifier while analysing its output impedance ..why we consider collector resistance (Rc) in parrallel with output impedance (Ro) of the amplifier...since as they appear in series ..as seen by the KVL equation(which involves Vcc=IcRc+Vce+IeRe)...

I'm working on a little arduino-like project that involves a motion detector with customizable sensitivity. The ambition here is that I could get a PIR sensor wired up that would give an analog-esque output depending on how much motion it detects. I know standard PIR sensors have a...

Hi all, Does anyone know how to get the program: FEMM (Finite Element Method Magnetics) to output the magnetic field strength and direction in a data file? The program tells me the magnetic field in an output window anywhere i click my mouse on. However, I would like it to output the magnetic...

Hi, I am having a bit of trouble trying to record the output from my code and any help is highly appreciated. Attached is the code that needs to be looked into (changed extension to .txt from .f as PF wouldn't allow it) and a screenshot of output that I am trying to record. What I am trying...

1. I have the following setting of free space than a lense and again free space i need to solve for the output field as in the figure attached. 3. i used the fresnel transform once and then multiplied the field with the exponential and then convolved all the field. still couldn't make it to the...

Hello! First of all excuse my English. I'm Swedish. I'm doing an exprement in which I utilize the energy from the rotation in a stroller wheel to charge a 5V battery . I plan to make a magnetic generator with a disc placed on a 10 " wheel, consisting of the 20 Neodymium magmeter on the radius...

Hi, as I was reading on generators I noticed that apart from the homopolar machine(faraday disc) all other generators are basically AC , or if they are DC then the very current generating loop or part involves changing and time varying currents. They usually have poles on the rotor or stator...

Lets say I have two water pumps that are the same and each can output around 100 psi of water pressure. If I were to connect them in series meaning that the output of 1 goes to the input of the other will the total pressure output at the last water pump be around 200 psi? what if I connect them...

Hi everybody I'm a newbie and working on LM324 to learn Op-Amp. this is my circuit: http://img4.uplood.fr/free/qx3o_20150425_172843.jpg One of the resistors is 217ohm and another 978ohm. then the gain should be 4.50691 as you can see. so far so good. I know this is for ideal Op-Amp. I applied...

So I built a 555 astable oscillator. I wanted to get 50 KHz on my output, which I have achieved, but the values of my components do not match the formula I have calculated. I have: R1 = 98 ohms R2 = 67 ohms Cap = 100nF So I have: 1.44/(98 + 2 67) 100nF Which should be 62KHz. Also can anyone...

Hey guys Don't know if this is posted in the right category. doing an technical report on industrial gas turbines. but i am kind of lost. Does anyone have any input to what we can write about? I'm thinking of any problems with the turbines that we can write about. What heat loss and how much...

Homework Statement How does the RC-link help with adding ripple to the signal? What would happen if the capacitor was removed (short-circuited)? Homework EquationsThe Attempt at a Solution I believe that the role of the capacitor is to pass on the AC voltage. Initially the capacitor is charged...

My teacher gave me this picture below. My question is why Io go through Rc but does not go through C2

according to this one source, cardiac output (vascular) = blood flow (http://legacy.owensboro.kctcs.edu/gcaplan/anat2/notes/APIINotes5%20cardiac_equations.htm) However, their equations do not match: Cardiac output (CO)= Stroke volume * Heart Rate Blood Flow = cross sec area of vessel times...

Hello, I'm new here and I'm also new in programming. I never did it before and now I have a problem with one of the programs in fortran 90 and I can't figure out how to solve it. Maybe some of you can help me. Many thanks in advance. 1. Homework Statement I need to plot the results of a...

Homework Statement (a) If R1 = 4.7kΩ, what value for C1 will give a cutoff frequency of 50kHz? (b) If the input voltage is described by the equation Vin = 3cos(2π(4000)t), what will the peak output voltage be?[/B] Homework Equations (a) fc = 1/(2πRC) (b) Vout/Vin = 1/√(1 + (2πfRC)2) The...

I'm currently studying Mechanical Engineering at Level 3 in the UK and I'm beginning my integrated masters in September. I've missed a large chunk of my studies this year due to a broken collarbone I sustained earlier in the year. Instead of getting any special dispensation I'm trying to work my...