Source Definition and 1000 Threads

Hi - I am by no means an EE, so please be aware I may have some fundamental flaws in my knowlege. I have a battery powered isoluation unit that takes some voltage in and provides either a voltage or current source output. I am giving it 1V as an input and according to the conversion ratio...

Hello. My teacher and I have had this very intense debate for quite some time now and we need your opinion on this issue. This question is, where does the energy released in a nuclear fission reaction come from? (Please use the terms "nuclear binding energy" and "mass defect") My take on this...

Homework Statement This is a really basic problem, just a closed circuit with a current source and a resistor. We are meant to give the voltage and the current across the resistor in terms of the current from the source and the resistance of the resistor. (From the diagram, express Vr...

In Huygens–Fresnel principle, to configure the diffraction pattern after an aperture, we need to consider each point on aperture as a point source of light. I need to make a simulation for diffraction. Here I will need to introduce the size of each point source. my question is why the size of...

Homework Statement A CS amplifier utilizes a MOSFET with μnCox = 400 μA/V2, W/L = 10, and VA=10v. It is biased at ID=0.2mA and uses RD=6k. Find Rin,AVO,RO Homework Equations VAO= -gm(RD||ro) Ro=RD||r0 The Attempt at a Solution I drew out the equivalent circuit with...

Hello, For convenience, we can say that a submarine at some depth in sea emits sound wave which refracts from the surface of the sea and is caught by a helicopter at some height above the sea. If we know the speeds of the submarine and the helicopter and the frequency of the emitted wave...

Thank you for any help that you can offer. Did I answer all of the questions correctly and thoroughly? Can you please find any errors, and point them out to me so that I can fix them? Homework Statement Show that : VB = 1.6V VE = 1.0V IE = 1.0 mA IL = 1.0 mA What is the voltage...

Homework Statement Image Attached Homework Equations Ohm's The Attempt at a Solution Combined the two resistors in series : 250 + 550 = 800 kΩ Source Transformation (Current Source): V = 140,000(2*10^-6)= 0.28 V Combine the voltage sources : 6 - 0.28 = 5.72 V But then I...

I have looked around for a group of people who perform cancer research as a kind of open /crowd sourced project. Not paid researchers, but a group of people passionate about science and finding a cure. I have found some resources for this kind of research through organizations like COSMIC but no...

Homework Statement Find Vo as a function of Vs Homework Equations The Attempt at a Solution My thought process so far is to do KCL and find Vo as a function of Vn2, then Vn2 as a function of Vo1, then Vo1 and Vo as a function of Vn1, then Vn1 as a function of Vs, finally giving me...

Homework Statement Problem #6 on the attachment Homework Equations The Attempt at a Solution I am stuck because if I do KCL at the node above the current source, It seems like all of the current should go back into Rs and none from the current source goes up to Rf

Is anyone able to provide a resource for the proper formulae to use in determining blade dimensions for an aperture mechanism? Free would be best but readily available in a mathematics library is acceptable as well.

I was wondering, every time I send or receive a TCP packet with an IP header, my local ip, ie. 192.168.1.x is displayed as the source or destination, respectively. Does this get changed as soon as the packet passes through my router, so the source/destination is listed as my external IP address?

Hello, I had read in my textbook that when a dependent source is in a circuit, and you wish to find the thévenin resistance, then the method to solve for the thevenin resistance is to turn off the independent sources and add an external voltage, then find the external current. The external...

Homework Statement Assume that Vs = 10V , R1 = 1.7Ω , and R2 = 0.50Ω. Find the current I in the figure using the superposition principle. Homework Equations Superposition principle KCL, KVL V=IR Current and voltage dividers The Attempt at a Solution I = I' + I'' First replacing the...

hello If I were to hang a traditional 100W clear glass light bulb from the ceiling, would it radiate 80W (radiant flux), the other 20W lost by air convection/conduction up the wires, or would it radiate closer to 60% or 40% of consumed energy? I can find plenty of figures for the...

hi i'm using Matlab/simulink to create a microgrid model which simulate dynamic control of power based on the loads. the loads are changing based on the realtime. I use several voltage sources to power the loads. I would like to be able to turn on/off the generator based on the loads. for...

Hello! By manipulating Maxwell's equation, with the potential vector \mathbf{A} and the Lorentz' gauge, one can obtain the following vector wave equation: ∇^2 \mathbf{A}(\mathbf{r}) + k^2 \mathbf{A}(\mathbf{r}) = -\mu \mathbf{J}(\mathbf{r}) The first step for the solution is to consider a...

Homework Statement Use the mesh-current method to find the power developed in the dependent voltage source in the circuit in figure (Figure 1) if v = 29V. Homework Equations ∑R in mesh 1 * i_1 - ∑R in common between meshes 1 and 2 * i_2 = v_source in mesh 1 ∑R in mesh 2 * i_2 - ∑R in...

Homework Statement Apply the source-superposition method to the circuit below to determine: (a) Vx’, the component of Vx due to the 1 A current source alone. (b) Vx’’, the component of Vx due to the 10 V voltage source alone. (c) Vx’’’ , the component of Vx due to the 3 A current source...

Hi! I would like to ask if there is possible to find out the photon flux emitted by a uv source having only the intensity/wavelength spectrum of the source? pp

Homework Statement Use resistance reduction and source transformation to find Vx in the circuit below. All resistance values are in ohms. Homework Equations The Attempt at a Solution For this problem, I know I can combine the 16 Ω resistors, but where I'm having a little trouble...

Hi, I have written a source subroutine and I am trying to link it with mcnp6. When I run my input file it says you need a source subroutine. My input file and the source subroutine(written in fortran) are in the same directory. Where do I have to keep the subroutine to link with mcnp? Any help...

I am currently designing an electronic circuit to detect fluctuations of the geomagnetic field in response to solar activity. One problem I am anticipating however is an over sensitive power source which will respond to thermal fluctuations in the holding room (can’t control room...

If the speed at which light waves propagate in vacuum is independent both of the motion of the wave source and of the inertial frame of reference of the observer, why isn't the direction? Shouldn't the light travel directly upward from the point of emission and not diagonally, following the...

Hello to everyone, I urgently need to solve the following pde: ∂u/∂t +∂²u/∂x² = So*δ(x-xo)*sin(wo*t) It's the heat equation with a cyclic source. The lentgh of the cable is L. I have no clue how to do this with such a source, all i have learned was to do a separation of variables, but it...

This post specifically queries the absorption, by matter, of (thermal) radiation which has been emitted from a source of a cooler temperature than the receiving matter. As I understand it, when matter 'receives' radiation, that radiation is either a) absorbed, b) reflected (or absorbed and...

So, I am reading my Modern Physics textbook (Tipler & Llewellyn), in the chapter on relativity. In discussing the Michelson-Morley experiment, the book states, "The speed of the waves depends on the properties of the medium and is derived relative to the medium. For example, the speed of sound...

I'm reading about electromagnetic waves and I can't make sense of their self-sustaining nature. If a charge accelerates for a moment and then stops a disturbance in the electric field is sent out. This changing electric field creates a changing magnetic field and they continue to sustain each...

Gravity -- use it as an energy source? If gravity is a force, why can't we use it as an energy source?

Legend: A is the source B is the photons/light C is the destination (which isn't fixed) c is obviously the speed of light Yesterday I was sat thinking about how visible light can be older than the universe itself. I came to the conclusion that the...

If we use only rest mass as the source of gravity, but use the rest of general relativity. What are the differences with observations. Excluding cosmology and dark energy. I mean real observations, not just theory. I exclude from the question, cosmology, dark matter and dark energy. In my...

In general relativity, the source of the gravitational field is the "stress-energy tensor" I know that thing is not just energy. Can some one explain what this quantity is? It's just a 'thing' that just happens to work mathematically and means nothing else?

What will happen in a ferrofluid in an elastic cylindrical tank when subjected to high voltage alternating current? Is it will expand and then back to its normal dimension periodically because of repulsion? The diagram on the attachment is the set-up, all answer will be appreciated. Thanks

Im trying to find movies like the 2 that I mentioned above. Where by majority of the scenes take place at one place. For source code was on the train, and for getaway was in a car. Does anyone know what do you call this type of movies. :D

About: I'm currently working on programming a basic circuit simulator for a game. One of the things i don't have a sure answer on is parallel voltage sources. I understand from what I've read so far that when two sources are in parallel the lower of the two gets overloaded. If they are the same...

when turning on a d.c circuit connected to a very simple solenoid, does the backward emf ever reach the source emf ? if it does then how does the current continue to flow ?

Homework Statement A fire truck emitting a 450 Hz signal passes by a stationary detector. The difference in frequency measured by the detector is 58 Hz. If the speed of sound is 345 m/s, how fast is the fire truck moving? Homework Equations frequency of observer = (velocity of sound...

Hi everyone, I have attached an image of the op-amp configuration (all op-amps are ideal). Basically, the question asks to calculate the resistance seen through the voltage source. The answer is 3 kΩ but I just don't understand how this is found. If someone could assist me, I would really...

Homework Statement Uploaded Homework Equations Uploaded The Attempt at a Solution So what I started with is Vg=(R2/(R1+R2))Vdd - 10 = -7 Volts this is incorrect though I was told it is -4 V what did I do

Very interesting bunch of guys trying to get a man into suborbit as cheap as possible. Found their website and youtube videos links at the bottom. Thought I would share. They have interesting video's of engine tests as they try to design the first rocket to send a man into space...

Hello, I'm in the process of calibrating a thermometer/datalogger (Omega DP470) that uses a thermocouple type T (-200-350 deg. C range), and I need a DC voltage source that can feed a steady voltage of 39.000 mV. I believe at this point I can either purchase a precision voltage source that...

Homework Statement What is meant by this: "When mirroring a source in a plane mirror, it looks like the rebounding light rays come from a virtual source at the back of the mirror." I will illustrate this with a question: The figure shows a light source A, from an ordinary light bulb, that...

I constantly see references to the "strong CP problem" which is basically just the fact that the CP asymmetries in the SM are not large enough to account for the observed CP asymmetry in the universe. What I find odd is that nobody ever mentions the HUGE CP asymmetry caused by our current...

Any favorites guys? And have you developed any source code personally?

Say you're in a place either 15 degrees north or south of the equator where average temperatures are over 25C (77F), a large majority of days are either cloudy or rainy and there isn't any wind. You need 50Wh a day for your needs and the battery you have happens to have a capacity of 50Wh as...

Homework Statement I'm given this configuration with a AC source at v_{i} with a R_{sig} connect to the source before the capacitor. R_{sig} = 0.6 KΩ R_{G} = 1 MΩ R_{D} = 2.7 KΩ R_{L} = 4.7 KΩ I_{DSS} = 10 mA v_{p} = -6 V Homework Equations The Attempt at a Solution...

Homework Statement We are given that a light-bulb radiates 0.1 W from it, and the wavelength of light emitted from it is 530 nm. Seeing as the human eye requires around 6 photons per second for the brain to register a light signal. I am then asked, what is the largest possible distance...

I'm trying to design a bidirectional current source for the purpose of measuring very small (0.0001 Ohm) resistances. I've come across this circuit: I can see that the transistors are there to 'boost' the current but I don't understand the purpose of the 1K resistors and the capacitor. I...

Homework Statement Find Vx, Is and power on the dependent source. The Attempt at a Solution http://s17.postimg.org/3x4hszzkf/002.jpg