What is produced: Definition and 297 Discussions

In a nuclear reactor, what kind of energy is produced when the radioactive isotopes go through fission? How much of it is in the form of electromagnetic waves? Are the waves mostly in the UV and Gamma Ray region of the electromagnetic spectrum?

Hello, I'm attempting to work out the number of ion pairs produced by a 5MeV alpha particle in UF6 (in each of the solid, liquid, and gas states). Using the technique from my old radiation physics book (Turner 3rd ed) I should simply apply the Bethe formula -\frac{dE}{dx}=\frac{4\pi...

Hi everyone! I am new to the forum but you have helped me many times in the past. I need your opinion about how much (roughly) brake torque can be produced by a regular car. I am developing a simplified vehicle model and I don't know how much torque to apply when the vehicle slows down. I...

They say that nichrome is a better heating element as it has a higher resistance. But if I take V=RI then ain't I decrease since R is high, so current is lesser. Thus, resulting in a lower power dissipated as heat? Also, they aq if I use the wrong wires like thin wires, it will cause a lot of...

Astrological "evidence" produced by looking at the tails of a normal distribution I just ran across this on a large news aggregation website, so I'm sure some people here might have seen it as well. http://www.inquisitr.com/173752/jail-time-predetermined-by-astrology-signs-says-police-study/...

Does anyone have sources on how many PhDs of each field is being produced each year? i.e. how many physics PhDs graduate each other, how many in mathematics, etc.

I am working on a desalinization project and need technical advice. These are the basics: If I have a 1,000 sq ft pool of heated water, covered with a chilled baffle, then enclosed in a greenhouse, how much liquid water can I produce through condensation in one day? Any ideas or feedback...

Hi all, I want to measure the white noise produced by a resistor in my circuit. In order to do this I did the following: 1. Ground the excitation voltage of the circuit and measure the white noise voltage produced by connecting the output of the circuit to a 8.5DVM 2. Subtract the Avg DC...

Homework Statement Two thin rods of length L lie on the x axis. One of them has a charge of -Q uniformly distributed along its length and is positioned between x = -L and x = 0. The other one has a charge of +Q uniformly distributed along its length and is positioned between x = 0 and x =...

By spinning a magnetic field in the presence of conducting wire, how much voltage/current is produced? Thanks.

And does the type of particle depend on the speed of the colliding protons?

Homework Statement The motor that drives a reversible refrigerator produced 142 W of useful power. The hot and cold temperatures of the heat reservoirs are 20°C and -6.1°C. What is the maximum amount of ice that can produce in 2.2 hours from water that is initially at 6.0°C? Homework...

How do you find the heat produced from the frictional force between two objects. For example, a person roller skating on a rink or a car going at 100m/s.

I've read that the atmosphere has a gradient of 100 V/m as altitude increases. My question is, if I suspend a low resistance wire vertically so that each end of the wire resides in a differently charged region of the atmosphere, would a current be produced in this wire?

Homework Statement if 20.0 g of dihydrogen is reacted with 20.0 g of dioxygen , how many grams of water is produced? Homework Equations The Attempt at a Solution balancing 2H2 + O2 = 2H20 now 2 mole h2 gives 2mole H2O so 20/2 moles of H2 will give 10 moles H2O 10 x 18 =...

Hi, I'm researching a potential masters project involving incorporating piezoelectric crystals into a ceramic so that when a load is experienced the electric field generated encourages the electroplastic effect in the bulk phase so that it becomes more plastic and inhibits crack formation...

A classical electromagnetic field requires you to know how far away from the source of the field you are, if this requirement is carried over to QED, how is the EM field of a particle known when we only know the probability of this particle being in a certain place?

Is there anyway to find out or approximate how much carbon dioxide a person produces per day, how much oxygen does a plant produce per day. And do different species of plants produce different amounts of oxygen?

I don't know anything about chemistry or physics, so this might be a stupid question. when neutrinos collide with let's say the nucleus of an atom, how much energy would be transferred from the neutrino?

Hi all, I'm studying for my and I've been trying to do one of the past exams from the University of Auckland. Unfortunately I'm not so clever so I'm asking for some help Two design proposals for a wind park have been made. The first design uses 10 turbines, each with a height of 90m and a...

Hi, my question is say you have a heat mat 11" by 11" one that is 7W and the other is 12W, will the 12W heat mat produce more heat and how do you prove this by means of mathematics? Further to that, say if you have 6"x11" that is 10W and then a 11"x11" that is 20 watts, would the second...

Homework Statement http://scc.scdsb.edu.on.ca/Students/onlinecourses/Sikora/sch4u/v12/64.pdf That is the lab I have been working on. I've done the lab but I am answering the questions. I don't understand the Analysis question #1. How do I calculate the reaction rate for oxygen if I don't have...

Hello, could someone tell me what the strength would be of the magnetic field produced by a coaxial cable that is supplying high-speed internet? Could you put it into perspective, as in comparing it to the strength of a magnet field of something else, say a standard household 110v line...

Parts Produced Vs Total Downtime - Graphical Interpretation Hi all! I'm working on a project analyzing downtime for a manufacturing floor. The department makes between 6 and 8 millions parts per month with 10-18 thousand minutes of unplanned downtime collectively (changeovers, maintenance...

I'm translating the problem, so sorry for the errors. Homework Statement Radius of the upper circumference = 5cm Radius of the lower circumference = 9cm Resistance/meter = 3.00 ohm/meter B is the magnetic field: DB/dt = 2.00 T/s What's the magnitude of the current, and where does the...

I'm translating the problem from portuguese to english, so I'm sorry if there are errors. Homework Statement Determine the magnetic field on the center of the circumference produced by the current in the conducting wire (the circumference is made of conducting wire too). The current goes...

Does anyone know where i can get a nice table of the amount of CO2 produced for each year with the corrosponding average global temperature?

This is part of a past paper I am trying to work through before a physics of fluids exam in a month.The angular frequency ω of a periodic surface wave with wavenumber k on deep water is ω = sqrt(gk) where g is the gravitational acceleration. Obtain an expression for the wave’s phase velocity in...

1. You are standing directly under a high-voltage power line that is 4.5m above you, and a detailed map that you have indicates that the power line runs exactly north to south. Your compass needle makes an angle of 32 degrees to the east with respect to the power line's direction. a)Knowing...

Is payment for employment determined by: 1) the value of the product produced, or 2) by the employees minimum requirements for survival, and the employer's need for employees in relation to the number of people competing for jobs? Seems to me like it's #2, but isn't that a little...

I was wondering what shape a (1/r^2)sin(theta) force would produce between two bodies. theta = angle between the distance between the two bodies and the velocity vector (90 degrees for a circular orbit).

Homework Statement A long, straight wire carries a current of 14A. Next to the wire is a square loop with sides 1.0m in length, as shown in the figure. The loop carries a current of 2.5A in the direction indicated. http://img69.imageshack.us/i/walker2260.jpg/ Calculate the magnitude of...

Homework Statement So, I got this task, which I feel either really dumb, or nobody is able to explain: I got this question: Z and W was discovered in 1973 at CERN, how were they produced? Include Feynman diagram and a short description. Then there is this question: How is the Z and W produced...

I have a blank 12ga round producing 2000psi In a .75" ID. cylinder. The 2000 psi shell is producing twice the power I need to push my 3lb rod out of the cylinder. The cylinder is 10" long and the rod is 8" long. There is 1" of room between the expanded shell and the solid shaft. I was...

Can someone please tell me why the formula for B at the center of a coil and the formula for B inside a solenoid give widely different answers in this problem? From Serway and Vuille, College Physics: "A solenoid with 500 turns, 0.10 m long, carrying a current of 4.0 A and with a radius of...

I was setting up a 2.0 mW, unpolarized 543 nm (green) He-Ne laser today when I discovered something odd. I was using an iris diaphragm (like these: http://www.thorlabs.com/NewGroupPage9.cfm?ObjectGroup_ID=206) to align the beam parallel to the laser table. I found that if I placed a white...

Homework Statement (c) A 0.1036 g sample of copper metal is dissolved in 48 mL of concentrated HNO3 to form Cu2+ ions and then water is added to make a total volume of 208.1 mL. (Calculate the molarity of Cu2+.) Homework Equations Molarity = Moles/Liter The Attempt at a Solution...

Homework Statement In order to raise the lamp post from the position shown, force F is applied to the cable. If F = 200 lb, determine the moment produced by F about point A. I've attached the diagram. I apologize for the terrible quality. The length of the post from A to B is 20 ft...

If a cylindrical induction generator has: a diameter of 4 inches 500 turns (coils) of #30 wire 4 2in magnets of unknown magnetic field strength and motor generating 3000RPM Note that the magnets will be rotating parallel to the turns in the coil. See attachment for concept...

I've been thinking about this for some time. If I have a loop (no outside magnetic field) and it is producing a magnetic field due to current going circulating through it what happens of I start rotating the loop extremely fast. Would it induce current upon itself because of changes in the...

Hi, I would like some help with the following question that has been bothering me. If energy is not created or destroyed then how does the following work: Consider an asteroid traveling close enough to the Earth to have its trajectory changed due to the gravitational interaction with...

Hi. This has been destroying my mind all day. Take, for example, a semiconductor laser with no internal photons initially. By spontaneous emission, one electron falls from the conduction band to the valance band and emits a photon with the bandgap frequency and a random phase. As this photon...

hi, if suppose a battery is 100% charged and is capable of delivering 12V. Now if i connect a bulb of 40watts across it then their will be a voltage drop and the internal resistance can be calculated. If the same battery with 100% charge is used with a 80watts bulb then again their will be a...

This is not a homework question (although the answer will help answer a homework question). I know that a non-Abelian group can have both Abelian and non-Abelian subgroups but can a non-Abelian subgroup be produced by an Abelian group (or must the group be non-Abelian). Any thoughts...

Homework Statement Hi A liitle help will be appreciated. The question is as follows: A laser beam of wavelength 630nm is directed normally at a diffraction grating with 300 lines per millimetre. Calculate: a) The angle of diffraction of each of the first 2 orders b) The number of...

Hi, I keep reading about particles being produced in certain interactions, but I'm not completely clear on what this means. The image I have in my head is this. Say two protons collide with each other and move off with less energy than they started with, and the energy deficit goes into creating...

Hi guys I have produced an ingot of NiTiHf alloy through Vacuum Induction Melting (VIM) process and by using pure materials of Ni, Ti and Hf. Casting was done in a Y2O3-coated steel mold, and the crucible was made of graphite. The problem is that, when I homogenize the ingot at 1000 oC and...

Hi, I'm having trouble understanding jets. After say, the initial collision, I get that you have a bunch of quarks and gluons left over. And that they must hadronize into colorless objects. But I'm not sure I get the jets part. I understand if we have two quarks that around bound...

Back in my physics class in high school, we had a homework problem that stated a car had a circular hood emblem (pretty much a Mercedes-Benz hood star) and that when the car was in motion it would produce electricity due to magnetic waves going through it while it was in motion. I now own a...

how do i calculate the power produced by a rotating disc? for example given that the constant angular velocity is 30rad/s, diameter of disc is 0.5m, mass is 15kg. or do u need more data to calculate the power? if yes, what data do u need?