produced Definition and 286 Threads

Homework Statement Why does an IC engine generate about the same maximum torque over a range of engine speeds but the maximum power at only one speed? Homework Equations None. The Attempt at a Solution For max power, the best I can come up with is that since torque does not drop as...

HI, I want to know how seismic waves are produced?. I cannot find any information on it on google. Any help will be helpful. Thanks.

Lots of articles and papers I read talk about the gamma rays produced during fusion reactions. And yet, when I look at equations for fuel cycles, the sum of the energies of the fusion products equals the total energy liberated. Since this implies that all of the energy released in the fusion...

I am not quiet sure where should i post this question, so forgive me if i asked this question at the wrong place. Now my Question is that how can an intensely thermochemical process like burning of a fuel produce, something like light which is a electromagnetic wave ?

I am not quiet sure where should i post this question, so forgive me if i asked this question at the wrong place. Now my Question is that how can an intensely thermochemical process like burning of a fuel produce, something like light which is a electromagnetic wave ?

please reply me i have a doubt. if two jet planes are flying together each producing 130 db sound. then what is the level of loudness heared by a person standing there. no other parameters are known. I have two concepts in mind ie) 1. every fundamental frequency produce hormonics and when two...

John Davis April 23rd, 2010 Rotterdam – A new project has discovered a surprising result considering the ability to plan forward in a short period. Always being too late does not only have to do with your manners, but the gender has the most influence regarding coming on time. A recent...

Homework Statement The diagram attached shows a metal wire stretched between two supports P and T which are 4x apart where PQ=QR=RS=ST=x . Three small pieces of paper are placed at positions Q , R and S . When the wire is vibrated at a certain frequency , the small piece of paper at R...

Is magnetic field is produced by uniformly moving charge?is it affect it,s magnetic field? Is Magnetic field of charge is due to relative motion?

Greetings Physics Forums! This is my first post. A physical phenomena that I know for a long time is that when an atom (let's say hydrogen) has an electron that make a quantum jump from a higher energy state to a lower it emits a photon. Suppose the hydrogen atom is isolated from the external...

What kind of errors would be produced by "excess" taq in PCR? Not sure if this belong in the Homework section. Put it here since it's not homework. What kind of errors will I get by adding 6.75µL taq pol to +50µL of cDNA? The master mix will be added to the cDNA resulting in an excess of taq...

Homework Statement Pacemakers designed for long-term use commonly employ a lithium-iodine battery capable of supplying 0.42 A*h of charge. b) If the average current produced by the pacemaker is 5.6 uA what is the expected lifetime of the device? Homework Equations C = A/s The...

Hi there, To start off with, I'm not sure if this is the right section or not, so if it is the wrong section could a mod please move it for me? Sorry! I'm curious to see if there is a way one would calculate the energy produced by triboluminescence. Like for example the amount of energy...

http://img192.imageshack.us/img192/9421/31387291.png I know that the magnetic field coming off the wire will be directed in a circle counterclockwise around the wire. So, from what I understand, it would work something like this: http://img709.imageshack.us/img709/1880/70281684.png...

Two charges are separated by 1.0 m. Q1 has a negative charge of 4.2 µC and Q2 has a positive charge of 1.4 µC. At what position is the net electric field that is produced by both Q1 and Q2 equal to zero? Extra Credit: If a +5.0 µC charge is placed at this position, what force would act on it...

Dear all, As I understand the venturi effect, if a flow of water passes through a constriction, its velocity increases and its pressure decreases at the restriction. The decrease in pressure allows a suction force to be produced. I am trying to use this principle in order to power a vacuum...

Hello, I have an idea to generate electricity using piezoelectric material. I entered this in a contest and my idea got selected. Now I have to prepare a detailed presentation of the idea for which I need to figure out approximately/roughly how much electricity will be produced. I am a layman...

Homework Statement In the following diagram, why not 6 images are produced? Explain thoroughly. And mention the amount of images produced. Problem Image: http://img691.imageshack.us/img691/8315/imageproduced.jpg or http://file15.9q9q.net/preview/92743229/Image-Produced.jpg.htmlPlease...

Hi, Got what seems like it should be a basic particle physics problem that I can't quite get my head around, I could do with some guidance. Here's the problem: I have electrons with 4GeV energy striking target protons and producing some neutral particle Q. I'm supposed to calculate the...

Homework Statement Gasoline consists primarily of octane, C8H18 Calculate the mass of CO2 produced from the complete combustion of 3.79 L (1.00 gallon) of gasoline (assume octane, density = 0.756 g/mL) with excess O2 The Attempt at a Solution The balanced chemical formula would be: 2C8H18 +...

if an electron is accelerated by 2eV energy. then what will be the wavelength of emw produced? can we use E=hc/wavelength here? should we use always de broglie hypothesis for this? what will be the difference between wavelength of electron and wavelength of emw? are they same or not?

http://img22.imageshack.us/img22/1958/physicsl.jpg My attempt, After all the integrals I've got the final equation (1/4piE0) * |q| / ( d * sqrt ( d^2 + (L/2)^2) ) i'm not too sure how to express it how the question asks, please help! the bit I'm confused on, is the ( d * sqrt (...

Right. Here's how it is, in the past I measured approximate laser power output using diffused LEDs of similar colour wavelength as the laser I was measuring. A multimeter across the terminals showed a current which was proportional to the power of the laser. I once asked my physics teacher...

Homework Statement Diverging lenses produce a "virtual" image, which can be seen but can't be projected, and converging lenses produce a "real" image which can be projected but not seen. How come we can see the image produced by a converging lens, which is supposed to be a real image...

A box 80.0N is to be pulled across a smooth horizontal floor with a force of 20.0N at an angle of 60 degrees to the horizontal. What acceleration will be produced? I know this probably seems simple, but I have searched my lecture notes, my textbook and the web but I can't find out how to...

Homework Statement In the figure below, positive charge q = 7.81 pC is spread uniformly along a thin nonconducting rod of length L = 12.5 cm. What is the magnitude of the electric field produced at point P, at distance R = 6.00 cm from the rod along its perpendicular bisector?Homework...

Hey, I am doing a question for a physics assignment, and it asks me to find the "wavelength of radiation produced by a proton in a cyclotron with a radius of 0.500 m and magnetic field with a magnitude of 0.200 T." Unfortunately the textbook doesn't give me an equations that have anything to do...

Homework Statement In Niels Bohr's 1913 model of the hydrogen atom an electron circles the proton at a distance "R" with a speed "v". Compute the magnitude of the magnetic field that this motion produces at the location of the proton. Homework Equations Bio Savart B = mu*I / 2R =...

Homework Statement A power line carries a current of 95 A along the tops of 8.5 m high poles. What is the magnitude of the magnetic field produced by this wire at the ground? How does this compare with the Earth's field of about 1/2 G? Homework Equations B= uo\mu/2\piI/r The...

Hello, I have measurements of the sound intensity produced by a sound source for a given frequency (*). These measurements were taken on on a grid on an imaginary sphere around the source. From these measurements it is clear that the sound intensity is not equal in all directions. The...

Homework Statement A small object A, with a charge of -2.78x10^-10 C, creates an electric field. At a point P located 0.250 m directly north of A, the field has a value of 40.0 N/C directed to the south. If a second object B with the same charge as A is placed at 0.250 m south of A (so that...

Hi I need help with a Stoichiometry problem. I am complete lost. I don't know where to start, or how to to solve. 2H2 + O2 -2H2O. I know the formula balances and that is it. The questions is How many grams of H2O are produced when 2.5 moles of O2 are used? Thanks!

how can i determine how many amps are generated by a typical automobile engine? how many amps can i suck off of a car battery while the car is running, and not slowly drain the battery of its power?

[b]1. This problem is part of an engineering model I am working on for a class. I am ultimately trying to model the torque applied to a bottle as a function of the static/kinetic coefficient of friction between it and the rubber cone it is being torqued by (The reason for this being bottle caps...

Homework Statement What mass of Au is produced when 0.0500 mol of Au2S3 is reduced completely with excess H2? Homework Equations The Attempt at a Solution .100 mol Au3+ x 197/1 = 19.7 g 19.7 g is apparently wrong though according to the book; what am I doing wrong?

Homework Statement 4Fe+3O2=2Fe2O3 deltaH=-1.65 x 10^3kJ If there are 15.7 grams of iron and 7.99 grams of oxygen, how much heat will be produced? Homework Equations Since Iron is the limiting reagent do I use that to determine the heat released? The Attempt at a...

Homework Statement Chromium metal, Cr(s) can be prepared from reacting chromium oxide, Cr2O3(s), with aluminum, Al(s). Al2O3(s) is a by-product. Assume a reaction of 20,0 kg of chromium oxide with 5,00 kg of aluminum metal. 1)how much Chromium metal will produced from the above reaction? 2)...

What is fear? can anyone understand that fear is not only produced by physical violence, fear is some times irrational.

Hello friends, Iam new to this site and I hope I didn't post this form in the wrong location. I would like to know how to calculate pressure produced by explosion? To make it clear, here is an example: A metal box with volume = 10cm^3. There is, let's say, gas fuel with know quantity...

Homework Statement In a proposed fusion reactor, one possible reaction is H(2,1) + H(3,1) -> He(4,2) + n(1,0) How much energy might 150kg of the appropriate amount of isotopes of hydrogen produce? Values given Ar of H(2,1) = 2.014102 Ar of H(3,1) = 3.016050 Ar of He(4,2) = 4.002602...

volume of the torus, by revolving around line x = 3 inside circle x^2 + y^2 = 4 i got x = sqrt(y^2 - 4) and what would v = ?

Homework Statement y = x³ y= 0 and x = 1 and its revolved around the line x = 2 okay i have drawn the graph of y = x³ and other paramaters, but when i get ther area being rotated it produces a hollow center. how do i go about finding the volume? would it be a washers i don't...

hi everyone, I have a problem, if U see the photo I have coil which carries current of rectified ac waveform through it. I have sludge(Steel rod of weight 20#) which has to be moved till the centre of the coil. If the current in coil induces magnetic field to sludge to move upward, then...

Ok, so anyone who has studied magnetism knows that the magnetic field due to a solenoid is given by the equation B=\mu_oNI Where N is the number of turns in a given length. Well, in thinking about these, I tend not to make measurements and would rather like to predict the magnetic field of the...

A long, straight wire is oriented in the north-south direction, and the current in the wire is directed to the north. The horizontal component of the Earth's magnetic field is 4.5 x 10-5T and points due north. A small horizontal compass needle is located directly below the wire, 1.9 cm from it...

I was browsing the internet looking for alternate proofs to why the electric field produced by an infinite sheet was equal to the charge density divided by twice the space permitivity constant. However, in my search I came across a proof that confused me at this link...

[SOLVED] Electric Field Produced by a Ring 1. Homework Statement A uniform circular ring of charge Q=5.60microCoulombs and radius R=1.30 cm is located in the x-y plane, centered on the origin as shown in the figure. If z is much smaller than R then E is proportional to z. (You should...

Hi i got a short question if i know the following U238 decays spontaniously to 2 Neutrons and Tellurium136 and some other isotope. How can i tell what other isotop is produced. Sure i know about baryon number conservation lepton number conservation can i just say ok i got 238 baryons on...

[SOLVED] Determine the mass of sodium chloride produced when 2.5 moles of chlorine ga Okay...I know how to solve half the problem. I know how to balance the problem but I'm not sure what to do next. I'm really bad at this stuff. Here's the question: Determine the mass of sodium chloride...

an electron is distributed around a proton according to the volume charge density \rho = A e^{-2r/a_o} where A is a constant, a_o is the Bohr radius and r is the distance from the center of the atom. Find A: we know that Q=\int \rho dV = -e i was wonder if this was the integral that i set up...