Proton Definition and 813 Threads

Homework Statement A proton enters a region in which there is a magnetic field B=0.2T pointing along the positive z axis,and an electric field E=7.4 N/C pointing along the positive y axis. If we want the proton to continue traveling in a straight line without changing speed,what should its...

Hi all, my question is not strictly related with physics and I don't know if it is the right section. Anyway I have a problem with a collimator: I need 100micron (or maybe smaller) collimator, but the high energy (60-70 MeV) of the beam need a material which is at last 5mm thick, (tungsten...

Hi, I'm considering the following process n+p→d+\gamma where d is the deuteron and \gamma a photon. I want to find out the energy of the photon. I know it will be much less than the rest mass of the deuteron (1875.666 MeV/c2). Can I simply use conservation of energy here? i.e E\gamma...

You are at the controls of a particle accelerator, sending a beam of 4.20×10^7 m/s protons (mass m) at a gas target of an unknown element. Your detector tells you that some protons bounce straight back after a collision with one of the nuclei of the unknown element. All such protons rebound...

Homework Statement A proton is moving along the main axis of a uniformly charged thin ring. The charge density on the ring is 5.0 nC / cm and the ring radius is 1.0 cm. Initially the proton is 2.0 cm (along the axis ) from the center of the ring with the velocity towards the center of the...

Hello, What methods are there to turn a moving proton or any positively charged ion into electricity. Does a positively charged ion, when moving, create an electromagnetic field like an electron will? If it moves through a negatively charged field of similar strength, slowing it down in effect...

Homework Statement A proton orbits a long charged wire, making 1.30*10^6 revolutions per second. The radius of the orbit is 1.20cm. What is the wire's linear charge density? Homework Equations - q E = m w^2 r - 9*10^9 [2 λ /r] q = m w^2 r The Attempt at a Solution λ = linear...

Homework Statement An ammonia molecule (NH3) has a permanent electric dipole moment 5.0 x 10^-30cm. A proton is 2.50nm from the molecule in the plane that bisects the dipole. What is the electric force of the molecule on the proton? Homework Equations F = QE = eE_yj =...

Homework Statement In quantum mechanics the de Broglie wavelength of an object depends on its momentum according to λ=h/p where h is Planck's constant. Protons of charge e and mass m are accelerated from rest through a potential V. What is their de Broglie wavelength? A) 2h/\sqrt{}meV...

Homework Statement photon(0 MeV), electron(0.511MeV), photon(938 MeV) have wavelength of 2.0*10^-15 m, 2.0pm. Calculate their kinetic energy, total energy, momentum, all in MeV, and velocity and frequency. Homework Equations E = K + mc^2 E^2 = (pc)^2 + (mc^2)^2 E=hf λ=h/p The Attempt...

Homework Statement A proton has a kinetic energy of 1000 MeV. In which of the following ranges does its speed v lie? a) v < 0.80c b) 0.80c ≤ v < 0.85c c) 0.85c ≤ v < 0.90c d) 0.90c ≤ v < 0.95c e) v ≥ 0.95c Homework Equations K = (γ-1)mc^2 E0 = mc^2 E^2 = K + E0 The Attempt at a Solution I...

For some reason I found myself wondering why we never talk about the contribution to the magnetic properties of materials due to the nuclear spins; we only ever worry about the electrons. After a short while I remembered that the magnetic moments of protons are vastly smaller than electrons (and...

according to the string theory, what is the difference between the strings that make the photons and the strings that make the protons? photons don't have mass and protons do, does it all ultimately rely on simply how the strings vibrate, or what? do photons' strings have lowest energy possible...

Homework Statement A proton has an initial speed of 3.5×10^5 . What potential difference is required to reduce the initial speed of the proton by a factor of 2? Homework Equations KE=.5*m*v^2 EPE=q*V The Attempt at a Solution I did KE=.5(1.67x10^-27)(3.5x10^5/2)^2 and then divided...

Homework Statement Take a look at this image first If two electrons are each 2.50×10−10 from a proton, as shown in the figure, find the magnitude and of the net electrical force they will exert on the proton. Homework Equations The Attempt at a Solution k=1/4πε0 So what...

Hello, First time posting, so I apologize in advance for anything wacky or off. Basically, I'm doing an online homework assignment for my class. Haven't taken physics in three years (hooray high school!), so I'm a bit rusty. I've laid out the math pretty much exactly how I've attempted it in...

Homework Statement A proton, which is the nucleus of a hydrogen atom, can be modeled as a sphere with a diameter of 2.4 fm and a mass of 1.67e-27 kg. Determine the density of the proton. Homework Equations As far as I know, the only required formula is D = m/vThe Attempt at a Solution Well...

Hello, I was wondering if it could be said that any proton can be identified as a hydrogen cation, and any hydrogen cation as a proton. Thanks.

Homework Statement A proton (+e) accelerates from rest in a uniform electric field of 640 N/C. At some later time, the proton's speed is 1.20 x 10^6 m/s. Find the acceleration of the proton. The mass of a proton is 1.67x10^-27 kg. Charge on a proton is +1.6x10^-19C. Homework Equations...

We know hydrogen atom is stable. Then, single proton is stable? Can we store it for a long time without decay? Do we have any related equation about particle stability?

What exactly is it that makes the energy/mass of a hydrogen atom be lower than that of the electron and proton separately? I am aware that this process is what causes stars to emit light, during nuclear fusion deuterium has a smaller mass than a proton and a neutron so its extra mass/energy is...

Maybe this question is already asked, but how did the first proton came into existence? A soup of quarks cooling down?At which temperature? How late was it on the clock? What was the size was the universe? How long did this proton lived? Did this proton had an impuls,energy,entropy?

proton beta plus decay --proton proton chain Im a biologist so forgive the ignorance. In beta-plus decay, a proton decays into a neutron and emmits a β+ and an electron neutrino. If the neutron is more massive than the proton where did the extra mass come from? Im asking in the context...

Homework Statement At time t=0, a proton is a distance of 0.360 meters from a very large insulating sheet of charge and is moving parallel to the sheet with speed 990 meters/second . The sheet has uniform surface charge density 2.34 * 10^-9 (C/M^2). What is the speed of the proton at...

A proton is placed in an electric field of intensity 700 N/C. What is the magnitude and direction of the acceleration of this proton due to this field? in a google I found that 1 proton= 1.6022 x 10 ^ -19 and 1.6726 x 10 ^ -27 kg so I first get the force : F= q*E f= (1.6022 x 10 ^ -19...

will you please explain this two electron and proton

We're made of roughly 10^28 protons. Let's imagine that the average lifespan of a proton were 10^28 years even though it is much higher. That would mean one proton per year would decay in our body. How much harm would one proton decay cause us?

The momentum of a particular proton is 20 5.5 10 kg m s - ¥ i . Relativistic effects can be ignored throughout this question. (a) Calculate the de Broglie wavelength of the proton. (b) Calculate the kinetic energy of the proton. The proton is directed toward a very distant...

Homework Statement The news just announced that aliens armed with either electron- or proton-guns have invaded the city. A quick glance reveals that there is indeed an alien on the street just below my top-floor, north-facing window. When the alien shoots his rifle vertically at the sky, the...

Homework Statement A proton's energy is 1.30 MeV below the top of a 14.0 fm-wide energy barrier, What is the probability that the proton will tunnel through the barrier? Homework Equations η=\frac{\hbar}{\sqrt{2m(U_{0}-E)}} P_{tunneling}=e^{\frac{-2w}{η}}The Attempt at a Solution I have...

I think wikipedia says that liquid elements have their electrons nearer the nucleus causing them to move more per moment, causing liquidness. Thus gallium at meltpoint apparently goes through vastly more quantum transitions than say either of its periodic table neighbors Zinc or Germanium...

I have learned that by rubbing, electrons are transferred from one object to another, making the gainer negatively charged and the loser positively charged. I also know that a proton is positively charged. Does it signify that a proton was once an entity that has lost its electrons?

Now let's say you have a mercury atom that has an atomic number of 80 , now let's say you take out a proton put of the nucleus by using a a lot of energy(nuclear binding energy). Now won't taking the proton out , turn it into a gold atom since gold has an atomic number of 79. ?

As title. Thank you. In the context of MRI, why/how does applying 90 degree radiofrequency at Lamour frequency put proton precessions into phase? I understand 90 degree RF minimises net magnetic moment, such that there is least difference between number of protons in parallel (with...

what is the speed of the proton?? Homework Statement What is the speed of a proton after being accelerated from rest through a 50x106 potential difference? m_proton = 1.67x10-27kg C = 1.6x10-19 c * This question is in Relativity. Homework Equations Voltage(v) = Joule(j)/Columb(c) K =...

I have been told when a proton and anti proton annihilate only the one up and one anti up quark destroyed forming ∏+ and ∏- measons. I don't understand how both protons are not fully annihilated? anti proton has: anti up, anti up and anti down quarks proton has: up, up down quarks Any...

Homework Statement A proton moves with a speed of 4300 m/s in a direction 76.0° above positive x axis. It enters a region where a magnetic filed of 25x10^-6 Tesla exists in the positive x direction. Find the radius of the helix formed by the protons path and the distance between adjacent...

Suppose an electron initially present at distance r from the proton is moved away to infinity,the energy of the system is taken to be zero.If it is so where does the energy pumped into shift away the electron goes and thus the law of conservation of energy is violated

Does the proton have n-pole excited states? Or n-pole excited states exist only for A>1?

When picturing electric fields, they are always based on a positive test charge. As you move on to potential difference and electrical currents, it is based more on electrons/negative charge. So, why aren't electric fields and fields lines based on a negative test charge instead of a positive...

Homework Statement Ok here is the question: Image below: Now the correct answer is: 1.63 x 10^7 m/s I am not getting that. Look at the image below to see what I am getting, with my work. Homework Equations The Attempt at a Solution

Homework Statement proton (mass = 1.67x10-27kg) is confined in a one dimensional potential well of infinite height and width of 2.847 x10-14m. Calculate the kinetic energy of the proton in the state with quantum number 1 in MeV Homework Equations KE = ((h^2)*(n^2))/(8*m*L^2) = ans /...

Fission type nuclear bombs and nuclear reactors use neutron bombardment to trigger the fission reaction but why not protons? Protons can repel the like electromagnetic fields of the other protons in the atomic nucleus so why not bombard the nucleus with protons instead?

Hello, So I'm reading about isospin in Griffith's Introduction to Elementary Particles, but the concept seems rather fishy, and I'm not quite sure what to make out of it. For example, if p and n (proton and neutron) are seen as different states of the same system, then what does...

Homework Statement Diagram shows the separations of a proton, electron, and α particle (charge +2e). What is the force (magnitude and direction) on the proton? Homework Equations Addition of vectors, Coulomb's law The Attempt at a Solution I keep getting 82 degrees but the answer...

Homework Statement The mass of a proton when at rest is m. According to an observer using the detector frame, the speed of the anticlockwise moving bunch, A, is such that va^2/c^2=24/25 Show that the total relativistic energy of a proton in bunch A, as observed in the detector frame, is...

Hi All Whenever there is a solar activity two things are mentioned, SPE, CME and X-ray. Does anyone know the difference between SPE and CME? I couldn't find a descriptive or convincing answer on these two. What particles are associated with CME, is X-ray a part of CME? And what effects could...

Need help with this question. What are the wavelengths of the two photons produced when a proton and antiproton at rest annihilate? Any help is appreciated, thank you :)

Homework Statement In a certain particle accelerator, a current of 300μA is carried by a 4.00-MeV proton beam that has a radius of 1.30 mm. The mass of a proton is 1.67 x 10-27kg. If the beam hits a target, how many protons hit the target in 3s? Homework Equations The only equation that...

Homework Statement The mass of a proton is 1836 times the mass of an electron. A) A proton is traveling at speed . At what speed (in terms of ) would an electron have the same kinetic energy as the proton? B) An electron has kinetic energy K . If a proton has the same speed as the...