What is produced: Definition and 297 Discussions

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...

I have been reading an article about a theory of gravity that involves space being curved or warped. An example was given where a heavy weight, representing the sun, is placed in the centre of a trampoline, and a golf ball, representing the earth, is caused to circle the centre of the...

This might seem simple... I'm having a bit of trouble both finding and interpretting information on how a gravitational wave is produced. I know they are analogous to EM waves, and that they are produced by accelerating masses, but it's more complicated than that, isn't it? Can anyone...

Homework Statement A circular loop of wire and a long, straight wire carry currents of I1 and I2 (see the drawing), where I2 = 5.2I1. The loop and the straight wire lie in the same plane. The net magnetic field at the center of the loop is zero. Find the distance H, expressing your answer in...

Hi all, My model of a car brake system is intended to monitor the rate at which heat increases/decreases as friction between a brake pad and disc increases. My equation for the force transmitted to the disc is: Force = (δP x Ac) x μb where δP is the pressure generated at the master...

Homework Statement A point charge of -8 µC is at the origin. What is the electric potential at (a) (3.0m, 0), (b) (-3.0m, 0), and (c) (3.0m, -3.0m)? Homework Equations V=kq/r The Attempt at a Solution a & b) V=(8.99x10^9)(-8x10^-6)/3 V= -23973.3 c)...

Consider a hydrogen atom. A photon strikes it at some random angle. The hyrogen's electron absorbs the photon. The electron becomes excited and its orbital increases. The electron deexcites and emits a photon. Question: Is the direction of the emitted photon a random direction. Or is...

A circular loop of wire and a long, straight wire carry currents of I1 and I2 (see the drawing), where I2 = 4.9I1. The loop and the straight wire lie in the same plane. The net magnetic field at the center of the loop is zero. Find the distance H, expressing your answer in terms of R, the radius...

I cannot get these two questions at all. Can someone teach me how to do these? A spring with k = 47 N/m hangs vertically next to a ruler. The end of the spring is next to the 15 cm mark on the ruler. If a 2.7 kg mass is now attached to the end of the spring, where will the end of the spring...

Does anyone know how insulin is produced nowadays? I know that bacteria get a human gene which codes for the production of insulin, but I'd like to get some more in-depth information because we have to make a folder at school.

What's the current maximum particle energy we can produce on earth? Also, what is the maximum we theoretically will achieve from proposed future accelerators, like the big loop at the LHC? I'm guessing 1TeV.

Hello all, I have been bitten by the bug of taking the Waste Vegetable Oil produced by the kitchen at the school where I teach Physical Science and reforming it into BioDiesel. I have spent the last two days absorbing what I can find on the net. All the recipies use lots of alcohol...

I'm on a ridiculous pace for completing a year's worth of Chemistry... I have two weeks left to finish over a semester's worth, so I'm struggling to learn all the concepts thoroughly and get decent grades. And so I keep getting stuck on problems. This problem is really giving me a headache...

http://physicsweb.org/articles/news/10/2/6/1

Given two light bulbs with the following ratings: 75.0W 120VAC and 100W 120VAC. They are connected in series across a potential difference of 120. VAC. Assuming that the operating resistances of the bulbs are not affectd by the series connection, calculate (a) the power produced in each bulb...

the reaction of H and F produces about 500 kj/mol of energy: how much energy is produced by the reaction of 2.0kg of H with 38 kg of F to produce 2 kmol of HF? The answer is 5.0x 10 to the exponent 5 kJ... but I'm not sure why... Please help! Thanks!

What is the easiest way you can tell or find out if oxygen is produced in a certain reaction? Or in other words, how can one prove that a certain reaction releases oxygen? The answer cannot deal with combustion. I searched on google, and couldn't quite get an answer. I thought about it for...

1) Explain how the "snap" of a wet towel is produced 2) Describe how a bat uses sound to find its way around 3)Why is is difficult for an aircraft to break through a sound barrier? if anyone can answer these questions it would be a lot of help. THANK

Lets imagine the wavefunction psy(x,y) and with this the probability distribution |psi(x,y)|^2 of the position of an electron is given. psy(x,y) is a two dimensional wave function. So how can I find the electric field strength produced by this electon at position x=3, y=2?

Hi, My question: Explain how an electromagnetic wave is produced? My Answer A charged particle produces an electric field. the electric field exerts a force charged particles. Positive charges accelerate in the direction of the field and negative charges accelerate in the direction...

I'm having a bit difficulty in understanding this question... In a Hydrogen aton, an electron goes round the proton at a rate of 7 x 10^5 rev/s in a circular orbit of radius 5.0 x 10^-11 What is the current produced by the revolution of electron? Well, the formula for current is Q/t and...

I was reading aboot sono-luminescence, and the researcher from llnl, that thought that he had (mistakenly) produced nuclear fusion. With all of the info available that I could find aboot sono-luminescence...it all seems to come down to 'how fascinating, but we don't much aboot it'. With that in...

If an alien species produced memories using process involving an overall negative entropy change, would it have memories from our future? It would appear to us as though these alien memories were being destroyed with an overall positive entropy change (since in our perception every reaction...

I do not know what to solve for...? One recargable battery of mass 15g delivers to a cd player an average current of 1.80mA at 1.60 V for 2.4hours before the battery needs to be recharged. The recharger maintains a potential difference of 2.30v across the battery and delivers a charging...

A flash light is pointed at a wall so that the angle between the beam and the wall is 65 degrees a) which conic section is produced? I am not sure if this is asking for the shape but I think the answer is an ellipse b) How would you adjuct the angle of the beam to produce a circle on the...

I am trying to understand the mechanisms for room temperature thermal radiation which is in the far infrared range. I have been told that photon emission in the infrared range occurs as a result of a reduction in the vibrational energy of molecules. Is this the same as phonons? How does a phonon...

Howdy I'm having a ton of trouble with this question Basically I have a spiral coil running around the z-axis with radius 'a' height '2b' and pitch 'c'. The point (x,y,z) = (a,0,0) is on the spiral and n = 2b/c (that's the number of turns on the spiral). There's a steady current running...

OK, here is a question I found in a book some time ago :- An insulated box containing a monatomic gas of molar mass M moving with a velocity v is suddenly stopped. Find the increment in the gas temperature as a result of stopping the box. I thought on this and what came to my mind was this...

A disk of radius 1.4 cm has a surface charge density of 4.9 µC/m2 on its upper face. What is the magnitude of the electric field produced by the disk at a point on its central axis at distance z = 12 cm from the disk? I tried solving this problem in the same way you would solve a similar...

i know I've asked this before and please delete it if i can't post it again, but i didnt get an answer last time and it seems to be to be a fundamental problem in my understanding. does string theory answer the question of how to leptons can be produced from one quark? if i undserstand string...

immediate source of the colored light produced by "neon" signs? What is the immediate source of the colored light produced by "neon" signs?

Dear sir/madam, I am confused as how sunlight and radiowaves are produced in terms of radiation. I am familiar with how Aplha, Beta, Gamma and Xrays are produced. I am to understand that Radio, Gamma, ultraviolet rays and microwaves are all types of radiation. I was wondering the...

For years I heard all sorts of promises about materials made in space. An alloy of lead and aluminum was often mentioned as a favorite. What is the state of this technology? Are things looking as good as promised?

can anyone explain howz x-ray been produced. thank you

Anyone know the equations governing the emition of radiation in a linear electron accelerator?

Some time back a friend (PhD Nuclear Engineer), told me that the energies a neutron needed to form C14 from nitrogen were (and this is where my memory gets real fuzzy) around 15 MEV. Furthermore that neither nuclear explosions or the Sun produced neutrons of this energy. The implications were...

sunlight hit my cd and a rainbow was produced. can anyone tell me why ?