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April 20, 2014

Search: physics - speed of electron in magnetic field

Number of results: 117,885

Physics Help
An electron with velocity v = 2.4 106 m/s i encounters an electric field E = 1250 N/C i. How long will it take for the speed to be one fourth its original value?
Monday, February 11, 2013 at 6:15pm by Lindsey

physics
An electron (mass m = 9.11 * 10^-31 kg) is accelerated in a uniform field vector E ( E =1.45 * 10^4 N/C) between two parallel charged plates. The seperation of the plates is 1.10 cm. The electron is accelerated from rest near the negative plate and passes through a tiny hole ...
Tuesday, January 29, 2008 at 6:07pm by jenish

physics
A moving electron passes near the nucleus of a gold atom, which contains 79 protons and 118 neutrons. At a particular moment the electron is a distance of 7.5 10−9 m from the gold nucleus. What is the magnitude of the force exerted by the gold nucleus on the electron?
Monday, February 7, 2011 at 10:16pm by anonymous

physics
A moving electron passes near the nucleus of a gold atom, which contains 79 protons and 118 neutrons. At a particular moment the electron is a distance of 7.5 10−9 m from the gold nucleus. What is the magnitude of the force exerted by the gold nucleus on the electron?
Monday, February 7, 2011 at 10:19pm by anonymous

Machanics
vf - vi = 5*10^6 - 2*10^6 = 3*10^6 where vf is the final speed and vi is the initial speed. Assuming a constant deceleration, the electron passes through 2.1 multiply 4cm = 8.4 cm of paper. 8.4 = 1/2*a*t^2 deltav = 3*10^6 = a*t where a is the acceleration, t is the time. You ...
Sunday, January 13, 2013 at 6:52pm by Jennifer

physics
They are trying to take you through the steps of computing the drift speed of elctrons in a wire. You should make an effort to follow the steps. (a) The atomic weight of iron is 55.9, so there are that many grams per mole. How many kg is that? 5.59*10^-2 kg/mol (b) They expect...
Saturday, March 10, 2012 at 10:06pm by drwls

Physics - urgent
I already asked this and was given an answer, but I don't fully understand it and so would like a further explanation. What I asked was... An electron is accelerated through a uniform electric field of magnitude 2.5x10^2 N/C with an initial speed of 1.2x10^6 m/s parallel to ...
Tuesday, April 21, 2009 at 9:38pm by Linn

Physics
In the Bohr model of the hydrogen atom, the speed of the electron is approximately 2.31 106 m/s.Find the central force acting on the electron as it revolves in a circular orbit of radius 4.95 10−11 m. Answer in units of N. Find the centripetal acceleration of the ...
Sunday, February 20, 2011 at 10:26pm by CR

chem 101
. In an electron microscope the electrons generate the image. For one of the scanning electron microscopes in our Central Analytical Facility, the electrons are accelerated to have a kinetic energy of 200,000 eV. Electrons with this kinetic energy have a velocity of 2.67 x 10^...
Friday, April 13, 2012 at 2:32pm by Anonymous

physics
An electron is accelerated in the uniform field E = 2.0 x 104 N/C between two parallel charged plates (Negative charged plate is on the left and positively charges plate is on the right). The separation of the plates is 1.5 cm. The electron is accelerated from rest near the ...
Sunday, May 27, 2012 at 6:04pm by myra

physics
Please help me answer the question below and also show equations and steps of how you came to your answer. Thank you 1. The electron in a hydrogen tom is in the first excited state, when the electron acquires an additional 2.86eV of energy. What is the quantum number n of the ...
Wednesday, September 10, 2008 at 7:43pm by jennifer

Physics
Please help me answer the question below and also show equations and steps of how you came to your answer. Thank you 1. The electron in a hydrogen tom is in the first excited state, when the electron acquires an additional 2.86eV of energy. What is the quantum number n of the ...
Thursday, September 11, 2008 at 1:02am by Jenny

physics
In a television picture tube, electrons strike the screen after being accelerated from rest through a potential difference of 25000V. The speeds of the electrons are quite large, and for accurate calculations of the speeds, the effects of special relativity must be taken into ...
Wednesday, March 26, 2008 at 5:43pm by Cindy

physics (answer in English)
It takes time T = L/v = 5*10^-7 s for an electron to pass through the plates. If, during that time, a strong enough electric field (V/d) is applied between the plates, the electron will strike one of the plates before it can pass through. If d is the plate separation, the ...
Saturday, May 28, 2011 at 7:29am by drwls

Physics
The electron is lighter but has the same force magnitude. a = F/m so electron accelerates faster. It has a negative charge so goes to the positive plate.
Saturday, February 6, 2010 at 8:19pm by Damon

physics
An electron is traveling through a region of space in which the electric field is along the +x direction and has a magnitude of 1560 N/C. What is the acceleration of the electron?
Sunday, September 12, 2010 at 1:46pm by Anonymous

physics
an electron is moving in a circular path of radius 1500 m perpendicular to a 2000 T magnetic fieldWhat is the tangential velocity of the electron?
Thursday, December 16, 2010 at 10:37am by twan

physics
An electron at rest is found to have a force of 0.40 N to the left. What is the electric field (magnitude and direction) at the location of the electron?
Sunday, February 19, 2012 at 6:10pm by Amber

physics
The speed of an electron is known to be between 3.010^6 m/s and 3.310^6 m/s . Estimate the uncertainty in its position.
Saturday, November 26, 2011 at 1:45pm by paige

Physics
The speed of an electron is known to be between 3.010^6 m/s and 3.310^6 m/s . Estimate the uncertainty in its position.
Sunday, November 27, 2011 at 8:43pm by paige

Physics
The speed of an electron is known to be between 3.010^6 m/s and 3.310^6 m/s . Estimate the uncertainty in its position. Change in X = ? M
Tuesday, November 29, 2011 at 11:21pm by Paige

Physics
An electron moving along the x axis has a position given by x = 14 te-t m, where t is in seconds. How far is the electron from the origin when it momentarily stops?
Sunday, January 16, 2011 at 2:47pm by Ethan

physics
An electron is released from rest in a uniform electric field of magnitude 2.00 x 10e4 N/C. Calculate the acceleration of the electron (neglect gravitation).
Thursday, February 2, 2012 at 5:50pm by Shakirah

physics
D. Do the numbers. Divide the current in Amperes by the electron charge, the free electron density, and the wire cross sectional area. V = I/(nAe)
Saturday, April 14, 2012 at 12:29pm by drwls

11th grade pre ap physics
A single electron is placed in an electric field where the intensity 103.5 N/c. What force does the electron experience?
Monday, December 13, 2010 at 10:30pm by ShMuel

physics
An electron is accelerated from rest to a velocity of 2.0x10^7 m/s. a) if the electron travelled 0.10m while it was being accelerated, what was its acceleration? b)How long did the electron take to attain its final velocity? Please correct me if I'm wrong but I believe the ...
Thursday, December 13, 2012 at 7:31pm by Leo

chem 101
In an electron microscope the electrons generate the image. For one of the scanning electron microscopes in our Central Analytical Facility, the electrons are accelerated to have a kinetic energy of 200,000 eV. Electrons with this kinetic energy have a velocity of 2.67 x 10^8 ...
Sunday, April 15, 2012 at 2:01pm by Anonymous

Physics
A neutron or proton has a mass about 2000 larger than that of the electron. Actually, its closer to about 1837 or so. You can look up the mass of each. The mass of an electron is 9.1 x 10^-31 kg. http://en.wikipedia.org/wiki/Electron
Tuesday, November 13, 2007 at 1:41pm by DrBob222

Physics. Free electron density, please help!
Compute the current I using Ohm's law. The flux of free electrons F is the free electron density tomes the drift velocity v. If you multiply this flux by the electron charge and the cross section, you get the current. By equating this with what you get from Ohm's law, you can ...
Wednesday, November 21, 2012 at 11:38pm by Count Iblis

Physics. Speed of electron...
Dr WLS is correct, E between the plates is sigma/episilon, not sigma/2epsilon.
Tuesday, February 10, 2009 at 10:29pm by bobpursley

Physics
The acceleration of the electron is a = e*E/m = 6.38*10^13 m/s^2 After time t, the speed is (1/2) a t^2. In your case, t = 76.1*10^-9 s
Friday, February 17, 2012 at 8:15pm by drwls

Physics
The anode (positive terminal) of an X-ray tube is at a potential of +105000 V with respect to the cathode (negative terminal). (a) How much work (in joules) is done by the electric force when an electron is accelerated from the cathode to the anode? J (b) If the electron is ...
Wednesday, February 1, 2012 at 8:53pm by anybody

physics
An electron and a proton have charges of an equal magnitude but opposite sign of 1.6 10-19 C. If the electron and proton in a hydrogen atom are separated by a distance of 5.4 10-11 m, what are the magnitude and direction of the electrostatic force exerted on the electron by ...
Tuesday, July 24, 2012 at 7:50pm by kkpdiluvu

physics
according to classical model of the H-atom,an electron moving in a circular orbit of 0.053 nm around the proton fixed at the center would be unstable and the electron should ultimately collapse to the proton. Estimate how long it would take for the electron to collapse into ...
Saturday, September 7, 2013 at 9:25am by kalyan

physics
An electron is accelerated by a 4.7 kV potential difference. How strong a magnetic field must be experienced by the electron if its path is a circle of radius 8.0 cm?
Wednesday, April 15, 2009 at 8:25pm by Mara

Physics
An electron is accelerated through 2200 V from rest and then enters a region where there is a uniform 1.30 T magnetic field directed perpendicularly to the electron's velocity.
Monday, March 7, 2011 at 8:33pm by Jay

physics
An electron with initial speed = 2.5410^7 m/s is traveling parallel to an electric field of magnitude = 1.6610^4 N/C .
Thursday, February 21, 2013 at 1:30pm by Elmer

Physics
The anode (positive terminal) of an X-ray tube is at a potential of +115 000 V with respect to the cathode (negative terminal). (a) How much work (in joules) is done by the electric force when an electron is accelerated from the cathode to the anode? (b) If the electron is ...
Sunday, September 2, 2007 at 9:14am by Mary

Physics help!!!
For that de Broglie wavelength, Electron momentum = p = h/(5*10^-11 m) where h is Planck's constant. Momentum p = 6.62*10^-34/5*10^-11 = 1.32*10^-23 kg*m/s Energy = p^2/(2m) = e*V m = electron mass e = electron charge Solve for potential difference, V. V = p^2/(2*m*e)
Sunday, June 17, 2012 at 9:19pm by drwls

Physics
In a 100 m linear accelerator, an electron is accelerated to 1.40% the speed of light in 35.0 m before it coasts 65.0 m to a target. (b) How long does the total flight take?
Thursday, September 6, 2012 at 4:54pm by Avery

Physics
An electron (mass m = 9.11e-31 kg) is accelerated in the uniform field E (E = 2.00e4 N/C) between two parallel charged plates. The separation of the plates is 1.10 cm. The electron is accelerated from rest near the negative plate and passes through a tiny hole in the positive ...
Sunday, February 6, 2011 at 11:55am by David

Physics
How much work is required to stop an electron (m= 9.11 * 10^-31 kg) which is moving with a speed of 1.8010^6 m/s?
Sunday, October 17, 2010 at 6:54pm by Eden

physics
The plates of a parallel plate capacitor are separated by a distance of 1.2cm, and the electric field within the capacitor has a magnitude of 2.1x 10^6 V/m. An electron starts from rest at the negative plate and accelerates to the positive plate. What is the kinetic energy of ...
Thursday, July 10, 2008 at 11:44am by H

physics
what has more predictable behavior, a proton or an electron, and why? a. an electron because of its smaller mass b. a proton because of its larger mass c. an electron because it doesn't feel the nuclear force d. a proton because it doesn't feel the nuclear force e. an electron...
Tuesday, April 14, 2009 at 1:35am by Jess

Physics
A uniform electric field exists in the region between two oppositely charged plane parallel plates. an electron is released from rest at the surface of the negatively charged plate and strikes the surface of the opposite plate, 3.20 cm distant from the first, in a time ...
Wednesday, July 8, 2009 at 10:40am by Sarah

Physics pls help
An electron is accelerated by a 6.4 kV potential difference. The charge on an electron is 1.60218 10^−19 C and its mass is 9.10939 10^−31 kg. How strong a magnetic field must be experienced by the electron if its path is a circle of radius 5.1 cm? Answer in ...
Thursday, April 14, 2011 at 7:26pm by cr

Physics
Two infinitely long slits, S1 and S2, each of width d=0.1 cm are used to prepare a box-shaped electron beam with energy E=400 eV. At what distance x from the slit S2 will the thickness of this electron beam double due to Coulomb's repulsion? The linear density of electron ...
Sunday, April 4, 2010 at 2:39pm by Anna

Physics
Could someone help me on how to put this all together. Atomic physicists ignore the effect of gravity within an atom. To see why, calculate and compare the gravitational and electrical forces between an electron and a proton separated by 10-10m. Im confused ok i have that the ...
Thursday, October 18, 2007 at 4:49pm by Olivia

Physics
A free electron is captured by a proton forming a Hydrogen atom. If the electron ends up in the ground state then what is the wavelength of the photon it emits during this process?
Friday, November 21, 2008 at 12:48pm by H

Physics
A free electron is captured by a proton forming a Hydrogen atom. If the electron ends up in the ground state then what is the wavelength of the photon it emits during this process?
Friday, November 21, 2008 at 2:09pm by H

physics
An electron in a cathode-ray-tube (CRT) accelerates from 20300 m/s to 3.99 106 m/s over 1.34 cm. How long does the electron take to travel this distance?
Monday, March 5, 2012 at 7:55pm by anmol

physics
An electron is a subatomic particle (m = 9.11 x 10-31 kg) that is subject to electric forces. An electron moving in the +x direction accelerates from an initial velocity of +7.93 x 105 m/s to a final velocity of 2.90 x 106 m/s while traveling a distance of 0.0904 m. The ...
Friday, September 24, 2010 at 12:08am by char

physics
An electron is a subatomic particle (m = 9.11 10-31 kg) that is subject to electric forces. An electron moving in the +x direction accelerates from an initial velocity of +5.21 105 m/s to a final velocity of +2.29 106 m/s while traveling a distance of 0.034 m. The electron's ...
Thursday, February 9, 2012 at 5:42pm by Natasha

physics
An electron is a subatomic particle (m = 9.11 10-31 kg) that is subject to electric forces. An electron moving in the +x direction accelerates from an initial velocity of +5.21 105 m/s to a final velocity of +2.29 106 m/s while traveling a distance of 0.034 m. The electron's ...
Sunday, February 12, 2012 at 12:32am by Natasha

physics
An electron is a subatomic particle (m = 9.11 x10-31 kg) that is subject to electric forces. An electron moving in the +x direction accelerates from an initial velocity of +5.11 x 105 m/s to a final velocity of 1.67 x 106 m/s while traveling a distance of 0.0654 m. The ...
Saturday, March 10, 2012 at 7:57pm by Natasha

Physics
An electron is a subatomic particle (m = 9.11 x 10-31 kg) that is subject to electric forces. An electron moving in the +x direction accelerates from an initial velocity of +5.08 x 105 m/s to a final velocity of 2.63 x 106 m/s while traveling a distance of 0.0895 m. The ...
Saturday, September 15, 2012 at 5:38pm by StressedStudent

Physics
An electron is a subatomic particle (m = 9.11 10-31 kg) that is subject to electric forces. An electron moving in the +x direction accelerates from an initial velocity of +5.16 105 m/s to a final velocity of +2.23 106 m/s while traveling a distance of 0.037 m. The electron's ...
Wednesday, October 3, 2012 at 10:55pm by Anonymous

Physics
An electron is a subatomic particle (m = 9.11 10-31 kg) that is subject to electric forces. An electron moving in the +x direction accelerates from an initial velocity of +5.16 105 m/s to a final velocity of +2.23 106 m/s while traveling a distance of 0.037 m. The electron's ...
Tuesday, October 9, 2012 at 9:54pm by Donald

physics
An electron is a subatomic particle (m = 9.11 x 10-31 kg) that is subject to electric forces. An electron moving in the +x direction accelerates from an initial velocity of +5.46 x 105 m/s to a final velocity of 2.25 x 106 m/s while traveling a distance of 0.0803 m. The ...
Sunday, November 25, 2012 at 11:09am by John

physics
Electrons move through a certain electrical circuit at an average speed of 1.7 x 10-2 m/s. How long (in minutes) does it take an electron to traverse a 1.8 -m light bulb filament coil?
Friday, September 7, 2012 at 8:52pm by Redgy22

Physics
A small but measurable current of 3.20 E-10 A. exists in a copper wire whose diameter is 0.03 cm. Calculate the electron drift speed (in meters/second).
Saturday, November 10, 2012 at 9:17pm by andrew

physics
Marks: 1 In which of the following cases is the wavelength of the emitted radiation greatest? Choose one answer. a. Electron jumps from third orbit to second orbit. b. Electron jumps from third orbit to first orbit. c. Electron jumps from fourth orbit to first orbit. d. ...
Sunday, May 1, 2011 at 3:34pm by ashley --- HELP PLEASEE!!!

Physics
Im confused ok i have that the mass of a proton is 1.6726231 x 10^-27 and the mas of an electron is 9.1093897 x 10^-31 charge of an electron is 1.602 x 10^-19 what do i do with all of this, is g1 the charge of the proton g2 the charge of the electron? what is d is that 10 m?
Thursday, October 18, 2007 at 3:34pm by Olivia

Physics
Let a be the separation. I do not understand your 1×10−10 {\rm } notation for a Bringing in the first electron requires no work. Bringing in the second electron required k^e^2/a Bringing in the third electron requires 2ke^2/a The total work required is 3 k e^2/a k is the ...
Saturday, February 5, 2011 at 9:45pm by drwls

physics
At some instant the velocity components of an electron moving between two charged parallel plates are vx = 1.5 105 m/s and vy = 3.0 103 m/s. Suppose the electric field between the plates is given by In unit-vector notation, what are (a) the electron's acceleration in that ...
Wednesday, January 26, 2011 at 3:17pm by trisha

Physics
Two electrons are fixed 2.99 cm apart. Another electron is shot from infinity and stops midway between the two. What is its initial speed?
Thursday, February 9, 2012 at 6:39pm by Phil

PHYSICS
In the Bohr model of the hydrogen atom, the electron makes 6.0010^15 rev/sec around the nucleus.What is the average current at a point on the orbit of the electron?
Monday, April 11, 2011 at 7:46pm by Mattie

Physics
A single electron orbits a lithium nucleus that contains three protons (+3e). The radius of the orbit is 1.76*10^-11m. Determine the kinetic energy of the electron.
Monday, January 27, 2014 at 12:16am by Anji

CHEM.. THINK I GOT IT..NOT SURE
i got it (thanks for the input) i worked out the effective nuclear charge for both states and found out that for a 4s1 electron, Z* was 2 and for the 3d1, it was 1 thus, the 3d1 electron is shielded more than the 4s1 electron..so it could be said that the electron would occupy...
Wednesday, December 10, 2008 at 4:51pm by Kimora

physics
An electron is a subatomic particle (m = 9.11 x 10-31 kg) that is subject to electric forces. An electron moving in the +x direction accelerates from an initial velocity of +5.11 x 105 m/s to a final velocity of 1.67 x 106 m/s while traveling a distance of 0.0654 m. The ...
Sunday, March 11, 2012 at 9:42pm by Natasha

Physics
A hydrogen atom is in its third excited state (n=4). Using Bohr theory of the atom calculate (a) the radius of the orbit, (b) the linear momentum of the electron, (c) the angular momentum of the electron (d) the kinetic energy (e) the potential energy, and (f) the total energy...
Saturday, April 28, 2012 at 3:27am by Chi

Chemistry
Please help me break this problem down.. Thanks lot. Light with a wavelength of 425 nm fell on a potassium surface, and electrons were ejected at a speed of 4.88 X 10^5 m/s. What energy was expended in removing an electron from the metal? Express the answer in joules (per ...
Sunday, January 13, 2008 at 3:44pm by Olivia

Physics
In the Bohr model of the hydrogen atom, the speed of the electron is approximately 2.41 106 m/s. Find the central force acting on the electron as it revolves in a circular orbit of radius 4.92 10−11 m. Answer in units of N. i used 9.10938188 10-31 as my mas and ...
Wednesday, June 22, 2011 at 10:43pm by JRD

Physics Mechanics (unsolved)
An electron of mass 9.1E-31 kg is released from rest at a distance of 7.1 E-10 m from a fixed electron. The force on the movable electron is given by the function F = 2.3E-28/r^2, where r is the distance between the electrons. Find the maximum velocity (in meters/second) of ...
Friday, April 13, 2012 at 9:45pm by andrew

College Physics
An electron is accelerated through 2550 V from rest and then enters a region where there is a uniform 1.30 T magnetic field. What are the maximum and minimum magnitudes of the magentic force acting on this electron?
Monday, March 22, 2010 at 11:31am by Anonymous

Physics
An electron is accelerated by a uniform electric field (1000 V/m) pointing vertically upward. use newton's laws to determine the electron's velocity after it moves .10 cm
Sunday, April 25, 2010 at 10:54am by Standard C.

physics
how far apatr should two electrons be if the electric force each exerts on the other is equal to the weight of an electron ? ( take the mass of an electron to be Me = 9.11 x 10-31 kg ).
Friday, November 26, 2010 at 6:21am by hashi

physics
Let's assume you use green light (λ = 550 nm) to look at an electron. What is the uncertainty in determining the electron's velocity? Express your answer rounded up to the nearest hundredth.
Saturday, October 8, 2011 at 4:38pm by Ky

PHYSICS
An electron in a TV is accelerated toward the screen across a potential difference of 52.8 kV. How much kinetic energy does the electron gain while accelerating? How would you solve this?
Tuesday, February 18, 2014 at 2:37pm by Carlos gen

Physics
An electron and a proton are each placed at rest in an electric field of 363 N/C. What is the velocity of the electron 76.1 ns after being released? Consider the direction parallel to the field to be positive. The elementary charge is 1.60218 10 −19 C and ...
Friday, February 17, 2012 at 8:15pm by Mary

physics
I need help with this problem so please help me. 1. A certain photoelectric surface has a threshold frequency of 6.2*10^14 Hz. A. How much kinetic energy is required to produce an electron emission? B. if the surface is illuminated with light that has a frequency 7.1*10^14 Hz...
Monday, January 23, 2012 at 6:19pm by Jessie

PHYSICS
An electron is initially at rest in, but not on the axis of, a solenoid that is carrying a steady current I directed as shown in the cross section below. The electron is initially at rest on the -x axis. The current in the solenoid is suddenly increaed to 2I. In what direction...
Sunday, December 15, 2013 at 5:11pm by Marc

Physics
The electron charge, e. You should know it. http://en.wikipedia.org/wiki/Electron It looks like you have two electrons.
Wednesday, June 4, 2008 at 5:49pm by drwls

Physics
An electron in a television CRT moves toward the front of the tube with a speed of 7.5x10^6 m/s. A magnetic field of 0.04T (on a 50 degrees angle) causes the electrons to accelerate. Determine the acceleration
Saturday, May 11, 2013 at 11:28pm by HELP

Physics
(a) Photon energy = h*c/L Electron energy = (1/2)(momentum)^2/m = (1/2)*(h/L)^2*(1/m) Energy ratio (photon/electron) = 2*m*(hc/L)/(h/L)^2 = 2 m L c /h = ? m is the electron mass and L is the wavelength. h is Planck's constant. This assumes the de Broglie relation between ...
Sunday, August 15, 2010 at 8:06am by drwls

physics
2.8*10^-6 C divided by the charge of a single electron, 1.60*10^-19 C/electron. It makes no difference what the material and size is.
Wednesday, November 18, 2009 at 1:15pm by drwls

chemistry help !!!!!!!!!!!!!!!!
a. Upon absorbing the 2 keV, an electron, we will call it the outermost one, will move to an outer orbit. b. N^6+ is a nucleus plus 1 electron. The H atom is a nucleus plus 1 electron. The N^6+ ion has 1 electron in the outer shells, there are 7 protons in the nucleus and 7 ...
Sunday, March 10, 2013 at 9:05am by DrBob222

physics
an electron of energy 100 mev collides with a photon of wavelength 3*10^6 nm.what is the maximum energy loss suffered by the electron..
Saturday, September 7, 2013 at 9:02am by kalyan

Chemistry
The resolution limit of a microscope is roughly equal to the wavelength of light used in producing the image. Electron microscopes use an electron beam (in place of photons) to produce much higher resolution images, about 0.16 nm in modern instruments. Assuming that the ...
Friday, March 30, 2012 at 12:21am by Ashley

physics
An electron and a proton are separated by 2.0 nm. (a) What is the magnitude of the force on the electron? (b) What is the net force on the system?
Thursday, February 10, 2011 at 9:54am by Jay

Gen Chem
Light of wavelength 272 nm shines on a piece of magnesium metal. What is the speed of the ejected electron? (Light energy greater than that of the work function of magnesium ends up as kinetic energy of the ejected electron. The work function is the minimum energy needed to ...
Monday, January 18, 2010 at 2:08am by Z

physics
The physics of an electron moving from one plate to another. An electron acquires 4.2 x 10-16 J of kinetic energy when it is accelerated by an electric field from Plate A to Plate B. What is the potential difference between the plates, and which plate is at a higher potential?
Thursday, April 28, 2011 at 12:59am by aly

Physics
An electron (m=9.11 * 10^-31) enters a uniform magnetic field B=1.8T and moves perpendicular to the field lines with a speed v=0.92c. what is the radius of curvature of its path?
Monday, April 14, 2008 at 4:07pm by Jenish

physics
an elecrton is placed in a uniform electric field of 232 n/c charge. if the electron is at rest at the origin of t=0 and the field is in the positive direction, what are the x and y coordinates of the electron at t=2.3 ns
Wednesday, January 16, 2008 at 4:34pm by michelle

College Physics
An electron orbits a proton at a radius of 5.38 10-11 m. What is the magnitude of the magnetic field at the proton due to the orbital motion of the electron?
Sunday, July 18, 2010 at 8:11pm by Anonymous

Physics
centripetal force = magnetic force m V^2/R = e V B, so B = (m/e)*(V/R) m and e are the electron mass and charge electron acceleration = V^2/R
Monday, February 7, 2011 at 7:54am by drwls

Physics
F = MA F = qv*B ma = qvb a = qbv/m m = mass of electron q = charge of electron
Monday, November 1, 2010 at 3:43pm by Rony

Physics
An electron that has velocity v = (3 x 105 m/s) and moves along positive x direction through the uniform magnetic field B = (0.8T) which is along the positive z direction. a. Find the force on the electron (magnitude and direction). (e = - 1.6 x 10-19 C, m=9.1 x10-31 kg) b. ...
Monday, April 25, 2011 at 6:41pm by asif

College Chemistry
Write a complete set of quantum numbers for the 5th electron added to H ion..(5th electron in any electron configuration). n= l= m(l)= m(s)=
Friday, November 19, 2010 at 11:26pm by Anonymous

Physics
Under the influence of the electric force of attraction, the electron in a hydrogen atom orbits around the proton on a circle of radius 5.3 x 10^-11 m. What is the orbital speed? What is the orbital period?
Monday, February 1, 2010 at 2:08am by Kathryn

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