Protons Definition and 343 Threads

Problem is: given the distance of closest approach in a coulombic fields is: d=\frac{1}{4\pi\epsilon_{o}}\frac{Z_{1}Z_{2}}{mv^{2}} calculate the distance for two protons with velocity v=3X10^5 m/s and mass m=1.7X10^-27 kg Can someone please advise on whether I should plug in the mass...

Electrostatics, electrons, protons, and all that good stuff:) Homework Statement Two uncharged metal balls, X and Y, stand on glass rods, are in touch as shown to the right. A third ball Z, carrying a positive charge, is brought near the first two (closer to Y than X). Then the first two...

What is the electric field halfway in between two protons separated by a distance of 1mm? When I first did this problem I simply used the electric field equation to solve which is E=kq/r2. However, as I came across another similar problem that states: " a proton and an electron are separated...

While researching for a problem that I wanted to solve i came upon the fact that there is no way to truly calculate the repulsive force of protons in the nucleus with other protons in the nucleus and how at what point it starts to be truly repulsive and not the "strong nuclear force" that binds...

Why atomic mass doesn't match the number of protons and neutrons in it? for example mercury mass is 200 gmol but it has only 80 protons and 80 neutrons. From where does 40 gmol come from?

Homework Statement Protons are being accelerated through a potential difference of 5,000 V in the gun of a particle accelerator. They must pass between two parallel deflecting plates that are 0.06 m long and 0.02 m apart with a potential difference between them of 1,500 V Homework...

Hello. One basic question. What properites that quarks have which their "compound" forms [protons/neutrons] don't have and vice-versa? That is, a proton may have some property or characteristic and the quarks might not be having that. So something which is NOT available at the components...

A proton is in a vacuum near the surface of Earth. Where should a second proton be placed so that the electrostatic force it exerts on the first proton balances the weight of the first proton? F = (k×Abs[q1]×Abs[q2]) / r^2 k = 8.99×10^9 Nm^2/C^2

Hi What does it take for hydrogen to form from protons and electrons? I have searched quite a bit and the only information that I have so far is from this webpage http://www.Newton.dep.anl.gov/askasci/phy00/phy00843.htm from the webpage ------------------------------ To form a hydrogen...

Positive electrical charges attract negative electrical charges. The protons in nucleuses (or nucleii? if that's how it's spelled) have positive electrical charges. Electrons have negative electrical charges. So why don't electrons stick to the protons in a nucleus instead of orbitting...

Homework Statement How many types of protons are present? Homework Equations compound 1: CH3CH2OCH2CH2CH2CH2CH3 and compound 2: CH3CH2CO2CH2CH3 The Attempt at a Solution Compound 1: Arbitrarily assigning hydrogens which see a unique environment, left to right...

If we can heat a gas so that the electrons "fly" off, can we heat one so that the protons do?

Hi I'm trying to calculate the energy of a proton in the sun. I know the temperature so I thought to use the equation E=3/2kT but in my textbook it says that I should only use E=kT. I don't understand why this is because surely each proton has 3 degrees of freedom? Thanks

The concept I have not been able to grasp, is WHY an acid has to have a positive hydrogen ion, and a base has to have a negative hydroxide ion. From what I understand, when an acid is placed in an aqueous solution is the following: H30 and Cl react to turn into H30+ and Cl-, but what I don't...

Two protons that are very far apart are hurled straight at each other, each with an initial kinetic energy of 0.15 MeV, where 1 mega electron volt is equal to 1x10^6 (1.6x10^-19) joules. What is the separation of the protons from each other when they momentarily come to a stop? i got 4.58e-13...

Homework Statement Let us consider a perfectly inelastic collision between two protons: an incident proton with mass m, kinetic energy K, and momentum magnitude p joins with an originally stationary target proton to form a single product particle of mass M. Due to conservation of momentum...

Alright, this one is really bugging me. Are protons magnetic. Are they attracted to a magnet or can the be controlled by a magnet?

Homework Statement Two protons (radius 10^-15 m) are headed directly toward each other with equal speeds. Use the principle of energy conservation to compute the minimum kinetic energy and initial speed each proton must have if they are to collide. Homework Equations W = delta K W =...

Homework Statement Richard Feynman once said that if two persons stood at arm's length from each other and each person had 1% more electrons than protons, the force of repulsion between the two people would be enough to lift a "weight" equal to that of the entire earth. Carry out an...

A difference in protons... Im not sure weather this is a pure chemistry question or if it has to do with physics as well so i posted in both forums...please don't hate me. How does a difference in the number of protons in an element lead to such a difference in the properties...

How does a difference in the number of protons in an element lead to such a difference in the properties (color, texture, form, etc.) of elements? I.E Gold and Mercury. This question has been driving me crazy and I would really appreciate any answers. Thank You.

Hi! frends please help...My question is just to know why electrons revolve arround the nucleus while protons stay inside the nuclesu.whats the reason behind...?

Example: Take a hydrogen atom and make it a carbon atom. Can we do it with our current technology? If so, how do they do it?

How do we know protons, neutrons and electrons exist? And what exactly is a positive or negative charge?... meaning what is it that makes it positive or negative.

Can there be any particle other than a proton or a neutron that can remain stably in the nucleus of an atom at ordinary temperatures and pressures? I'm aware of hypernuclei (nuclei containing hyperons) but none of those are stable. I understand that they all decay weakly. Is there any...

Homework Statement What is stopping electrons from collapsing onto protons of the atom? And why doesn't the electron go closer to the nucleus than the 1s orbital? Homework Equations The Attempt at a Solution

Say you have two protons 10nm apart (at rest). If they are released, they naturally tend to accelerate away from each other. But what's the velocity after they are very far apart? Basically, all the initial potential energy gets converted to kinetic energy. So I equal them to each other like...

my question is Does 1 kg of iron contain the same number of protons as 1kg of aluminium,hydrogen and wood Can we define mass of matter with no of protons and neutrons it contains?

Homework Statement Each of the protons in a particle beam has a kinetic energy of 3.25 x 10^-15 J. What are the magnitude and direction of the electric field that will stop these protons in a distance of 1.25 m? Homework Equations Felectric = kC (q*q/r^2) Electric Field= Felectric/q...

Imagine that a star could be composed entirely of protons so that Thomson scattering by protons dominated the stellar opacity. How luminous, in L_{\odot}, would the star have to be to blow itself apart by radiation pressure? I know that the luminosity has to be greater than the eddington...

Hello; My physics teacher asked me to name the combinations of quarks that could make up a proton and a neutron; uud = proton udd = neutron But is that all? Does it have to be 2 up quarks and 1 down quark to make the proton? Why not 2 charm quarks and 1 strange quark, for example? Or 2...

Why can't energy is absorbed by protons rather than by electrons when a light ray strikes the atom.

before i start i wanted to make it clear that this is NOT homework. its just a quick question which puzzled me and my friend In the shell model of the nucleus. i found a statement that said that since both neutrons and protons are fermions, there are restricted to 2 of each at each energy...

An element of helium consists of 2 protons, 2 neutrons, and 2 electrons. I have been told that anti-helium can exist if instead of 2 protons there are 2 antiprotons, instead of 2 neutrons there are 2 antineutrons, and instead of the 2 electrons there are 2 positrons. Is this true? Also...

if a proton is a particle itself how is it then when you colide 2 protons in hte large hadron colider you find a bunch of different particles?

Homework Statement If two protons start out at rest relative to each other, separated by 0.1 nanometers in vacuum, and then they are released, calculate their relative positions after 10 seconds. Homework Equations F = (kq^2)/r^2 = m*a The Attempt at a Solution I am fairly...

thanks so much for the help

Homework Statement Using a strict interpretation of the n+l rule, how many protons would an atom need to create a ground state electron configuration with one electron in a 5g orbital? Give electron configuration. Homework Equations The Attempt at a Solution g is an l value of 4...

Homework Statement The nucleus of a Helium atom contains 2 protons which are 1.0fm apart. How much work has to be done by an external agent to bring the two protons from an infinite separation to a distance of 1.0fm. Homework Equations F=k|q1||q2|/r^2 W=F*r The Attempt at a...

Homework Statement a proton with kinetic energy 10GeV collides with a proton at rest. 1 proton goes off with an angle of 45 degrees relative to the incoming proton. Find the velocity of both protons after the collison. This is an ellastic collision. E(initial) = 938 mev i honestly don't know...

In an electrical circuit, I hear a lot about the positive charge drift, but in my mind, I'm sure its only the electrons that actually move. Do protons move in an electric circuit?

Homework Statement Two protons are held fixed at a distance of 3 angstroms (3 x 10-10 m) from one another. The protons have a charge of +1.6 x 10-19 C. After they are released they repel each other and fly apart and each acquires some kinetic energy. What is the final total kinetic energy...

Here are some sources that talk about protons not being spherical: http://www.usatoday.com/news/science/2002-09-22-protons_x.htm http://www.google.com/search?hl=en&safe=off&q=proton+%22not+spherical%22&aq=f&oq=&aqi= And what about other things that aren't spherical like a molecule that...

A cylindrically shaped beam of protons has a diameter of 1.20 mm and has 1.40e6 protons per cubic centimeter. The kinetic energy of each proton is 1.15 keV. What is the beam current in microamperes? I know that: I=qnA<v> I am 99% sure this is the equation that you use. q is the charge of the...

Two protons that are very far apart are hurled straight at each other, each with an initial kinetic energy of 0.19 MeV, where 1 mega electron volt is equal to (1*10^6)*(1.6*10^-19) joules. What is the separation of the protons from each other when they momentarily come to a stop? separation = 1...

Can entangled protons be maintained in a crystal lattice for an indefinite period of time? The following papers seem to support this contention. I need the help of the Forum’s readers to critique this research and the assertions the authors are making. Dr. Francois Fillauxa and Dr Alain...

As I understand it, the magnetic field confines the electrons because of the repulsion of the electrons in the plasma and the electrons traveling in the magnetic current. My question is what keeps the protons and neutrons released in the plasma from passing through the magnetic field in a...

Homework Statement So basically my instructor did this as an example and I am having trouble figuring out exactly the train of thought. So we've got two protons, in the lab frame, one is at rest and the other is incident on the other. What I want to know is how much energy and how fast the...

I'm sure this is so easy and just 1 step. I can do questions like this, I just don't understand, this theory one, or whatever it is. Homework Statement How far apart are two protons if they repel each other with a force of 1.0 mN?Homework Equations F=k * Q1Q2/r^2 k=9.00*10^9 e=1.6*10^-19The...

I am a bit confused, because I was trying to solve a question involving lines of constant electric potential and protons/electrons which move through this field. Now, I noticed that I do not know why protons do accelerate towards lower potential? Could somebody please explain the reasoning...