What is produced: Definition and 297 Discussions

I have been using Maple for sometime as its document interface feels nicer and more friendly than mathematica's . I have never been able to plot arrows in Mathematica or use indices efficiently. I am more of a curious self teaching physics person. But I just found something interesting when...

So when a conductor in complete circuit is placed next to a moving magnetic field, current in the conductor is induced and the induced current again produces its own magnetic field. So does this new magnetic field act on the conductor? It's the same as the question in the title. Is my concept...

So I decided to try deriving a general formula for fun. Being a high school student, the calculus got scary very fast. At this point, I'm just curious as to what the best approach to this might be. The approach I used was finding y as a function of x and then inputting it into the arc length...

im doing some personal research into building my own generator. i am looking for info on how wire diameter affects the power produced by the generator. specificaly: what AWG of wire is best for coils that are being used to generate as clost to the statdard killowatt/hour as possible.

Scientists created Na2He in a diamond anvil cell. It is stable only above 113 GPa - but it forms at temperatures up to 1500 K, it is not something exotic that breaks as soon as you look at it. Na2He is a crystal with an unusual type of bond - it does not have regular bonds, but it has electrons...

if a capacitor is connected to a battery and then it is fully charged . then a dielectric slab of k is inserted in the capacitor while the battery is still connected SLOWLY my question is will there be any heat produced?? my approach -- after insertion of dielectric , the charge on the...

I found that in a cathode ray tube accelerated Electrons produce X rays! Now it can be in 3 ways 1) When the electrons are being accelerated by increasing Voltage...then according classical theoy they should radiate energy! It may be the X ray 2) When it reaches the metal plate there will be...

Hi, I am trying to calculate the power produced by this Stirling engine: I know there is a way of finding by measuring the pressure and temperature inside the engine but the only data I have is the weight the RPM and the weight of every part of the engine. I understand how to calculate power...

Hello, It seems everybody knows that iodine-131 is produced in nuclear reactors, but so far, I couldn't find any example of nuclear reactions starting with U-235 and leading to I-131...! Directly, undirectly, going through other fission products, going through beta decay... Nothing. I mean...

I was wondering if excess hydrochloric acid was produced during the reaction to make Nylon 6,6 (interfacial polymerization)?

Homework Statement Hi everybody! Being given three identical thin lenses with the same focal length, I have to determine ##a## (distance object-screen), ##d_a## (distance lens 1-lens2) and ##d_b## (distance lens 2-lens 3) so that a sharp image of the object appears on the screen regardless of...

Dear all, I have a question that has eluded explanation in fluid mechanics textbooks and even some of my colleagues. Suppose we have a general control volume. The application of linear momentum conservation will yield an equation of the form, $$\frac{\partial}{\partial t} \int_{V\llap{-}} \rho...

The other day I was at a river listening to some rapids. The sound produced by the rapids appeared to vary in pitch depending on how high up I was (squatting down to the ground and standing up produced about a fifth in the variation of the pitch); and I can't think why it should be? Many Thanks

i.If all the calcium carbonate used in set up X was used up for the reaction, what is the amount of moles of carbon dioxide produced during the reaction ? (Ca = 40, C = 12, O = 16) My progress: Molar mass of CaCO3=(40+12+(16*3))gmol-1=100 gmol-1 Molar mass of CO2=12 + 16* 2 gmol-1=44 gmol-1...

Are offsprings produced by hermaphrodites genetically identical because both the gametes are produced by the same parent ,as in some cases.

Homework Statement I have two related questions here. 1. A positive point charge is moving directly toward P. The magnetic field that the point charge produces at P is? 2. Two positive point charges move side by side in the same direction with the same velocity. What is the direction of the...

Homework Statement For a lab we need the equation of the magnetic field strength produced by a solenoid a distance r away from it (outside of it). I tried looking online and couldn't find one that didn't involve a bunch of cross products or similar. Wonder if anyone knows the formula? I know...

at 5:42 - What is Electromotive Force? Why does it make electrons move (make electric current) in one direction?

Poster's warning: this will be the second time I've touched upon the subject of solar flares here in Physics Forums, for which I offer my apologies. Nevertheless, I seek clarification about the likely effects of what a seriously powerful flare (or CME) would have, either upon an astronaut in...

Homework Statement Homework EquationsHEAT PRODUCED=WORK DONE BY BATTERIES - ENERGY ABSORBED BY CAPACITORS The Attempt at a Solution INITIALLY BEFORE SWITCH CLOSED :Initially a current flows only in the left most loop involving 4 microfarad capacitor.The charged on the capacitor during...

Homework Statement A uniform current sheet in free space is given to be, in phasor form, \vec{J}=\vec{x}J_0e^{-jk_1y} located at the z=0 plane. k_1 < k_0 where k_0 is the wavenumber in free space. a) Describe qualitatively the characteristics of the wave generated by the given current source...

From a fellow stormchaser in Europe GIANT hail up to 10 cm diameter in Talacyhn area, Vitsebskaya region, Belarus on July 13 https://scontent-syd1-1.xx.fbcdn.net/v/t1.0-9/13697084_1838281166394976_2089999493087491553_n.jpg?oh=028e330c98a65bc55ed26fe5841d343c&oe=57E9B763very effective car and...

I've been recently watching videos about white light and the double slit experiment and how it creates a rainbow. It let me to some confusion and I would like some clarification. My questions are: Do all stars like ours produce white light? Would red giants only emit red light and blue giants...

If your axel in you car was magnetic with copper wire casing would that produce electricity? If so how much? If there is no resistance in that process then there wouldn't be a detrimental effect on the performance (bar added weight of the wire) With the raising popularity of electric cars it...

Homework Statement An electric fish is capable of generating a voltage of 220V. This drives a pulse of 15A lasting for 2ms. The fish produces 200 pulses in one second. What is the average power output? Homework Equations P=VI P=E/t The Attempt at a Solution At first glance I thought we just...

What sort of EM field is produced in an induction heater? And how to measure it? That's it, basically. Assuming an induction heater is running on 200khz, and consuming about 3000 watts, how would I go about measuring the magnetic field produced in its coil? Now, I'm rather confused about all...

Homework Statement Hello all! I need a little bit of help with my physics homework! It asks me to calculate the change in volume produced by the piston, and it gives me the equation: ∆V= Ax∆dHomework EquationsThe Attempt at a Solution Now I know that A= 1x 10-^16m^2 And ∆d=1700nm My only...

Homework Statement Assume that a 14 kg sample of 240Pu is used to produce electrical power from its α decay. If your device is 60% efficient in producing electrical power, how much power can be produced? (in watts) Homework Equations Q=mass of plutonium-mass alpha-mass daughter; 240 plutonium=...

Why is sound produced? Say, for example, when a stone hits a tin box a sound is produced. Why is this sound produced? Even if the sound is produced in the ear, we generally say that the vibrations of the ear drum produces the sound, why is it produced. Why does vibrations produce sound. Even a...

Question is as follows: We have a single crystal of Al in a tensile tester. WE are applying a tensile stress, [δ][/Ψ] perpendicular to the 212 plane and we have found that slip has occurred. What is the shear stress that produced the slip? not sure how to proceed, first thought was use the...

A motor vehicle safety air bag contains sodium azide (NaN3) and potassium nitrate (KNO3). On impact, N2 is produced by the successive reactions: Reaction 1: 2NaN3—> 2Na + 3N2 Reaction 2: 10Na + 2KNO3—> K2O + 5Na2O + N2 What volume of N2 (in dm3) is produced from 140 g of NaN3 at 273K and 1 x...

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...

Can someone walk me through calculating the final step in this problem. Problem statement: If the charge q is produced by adding electrons to the mass, by how much will the mass be changed? It was calculated that the charge q is 2.374 * 10^-7 C which is correct and I know that we need to...

how would one calculate the number of ions produced per square centimeter when a continuous electrical arc is being produced between two electrodes that are separated by a meter, end in a fine point and have a voltage of 3.4 Mv? assuming standard air temperature and pressure.

Homework Statement / Homework Equations[/B] I was looking at Example 5.12 in Griffiths (http://screencast.com/t/gGrZEPBpk0) and I can't manage to work out how to verify that the curl of the vector potential, A, is equal to the magnetic field, B. I believe my problem lies in confusion about how...

I know GWs are produced by moving masses, but I can't find an explanation as to why it happens. A system would lose energy to gravitational radiation. Does the radiation get produced spontaneously, or would it be because the mass has to move through space-time which holds it back somewhat...

Hello Does the spacetime curvature produced by an object affect the object itself? Thank you in advance :) Greetings!

Hi, I have a very interesting but challenging question. Consider any chemical reaction that involves gas production (e.g. H2 gas is produced in KOH etching silicon). As we know, the produced gas will detach from the surface and reaction can continue. What if the gas doesn't detach from the...

We say the expansion coefficient of steel is 12 × 10 -6 m/m°C, Young's modulus 210 × 109 N/m2 and yield stress 250 mega Pascal. With 100 meters length and 0.1 m2 section area , If we increase its temperature 10 °C, how much energy will be produced by expansion force in Joules? with young's...

Homework Statement 2 moles of H2O undergoes electrolysis at 15 amps for 1 hour. What is the mass of H2 and O2 gas produced? Homework Equations 4 H+(aq) + 4e−→ 2H2(g) 2 H2O(l) → O2(g) + 4 H+(aq) + 4e− Faraday's Law of Electrolysis Q = n(e-) x F The Attempt at a Solution F = 96500C...

Acting upon a vector say, so it is defined as: ##\frac{d}{d\lambda}V^{u}+\Gamma^{u}_{op}\frac{dx^{o}}{d\lambda}V^{p}=\frac{DV^{u}}{D\lambda}## And this can also be written in terms of the covariant derivative, ##\bigtriangledown_{k}## by ##\frac{DV^{u}}{D\lambda}=\frac{d x^{k}}{d \lambda}...

Homework Statement this is the equation for flux density we have been given, the radius 30mm, z= goes in stages of 10mm, from zero to 50mm, then from zero to -50mm. that symbol at the begin of equation is 4 pie ! and the current is 5 amps. its is for a single-loop coil Homework EquationsThe...

My project is about to store the electrical energy produced by the gas stove lighter. I search and found that the gas lighter may produce 800 volt and 0 current. So now I need to know how to increase this current and store into the battery. Plz give me some idea...

Homework Statement (problem won't be word for word, because much of the info. is to throw people off); This large gummy bear, which contains 51 servings and each serving contains 29 grams of carbs. Assuming all the carbs are glucose, how many liters of CO2 would eating this gummy bear cause...

I have 2 questions about EM radiation produced by an occilating electric charge. Q1: With graphs of electromagnetic fields, you can see that it contains an electric and magnetic component. What does these mean or give information about? Q2: By occilating the charge, you will get such a graph...

Around massive bodies, light bends so that we can see multiple images of the same object, such as multiple images of the same galaxy behind the massive body. I know this seems kind of a dim question, but how can we know that the similar images we pick up are light rays from the same object that...

Faradays law tells us that a change in flux induces an emf. Now consider the phenomenon of motional emf. It is observed across the ends of an open conductor (ie one which is not in a circuit). It is always discussed in connection to faradays law. Where is the change in flux in the case of a...

Homework Statement A possible decay mode a of a positive Kaon in the production of three Pions as shown below:. K+ → π+ + π+ + π− Whats is the maximum Kinetic energy that anyone of the pions can have? The kaon is a rest when...

Homework Statement Dry saturated steam at a temperature of 180oC is to be produced in a fire tube boiler from the cooling of 50 000 kg h–1 of flue gases from a pressurised combustion process. The gases enter the tubes of the boiler at 1600oC and leave at 200oC. The feed water is externally...

Homework Statement Very large forces are produced in joints when a person jumps from some height to the ground. Calculate the magnitude of the force produced if an ##\small{80.0\!-\!kg}## person jumps from a ##\small{0.600\!–\!m\!-\!}##high ledge and lands stiffly, compressing joint material...