How does Particle Physics relate to any subject studied in Chemistry (including Nuclear physics)?
Q. Doing a ppt presentation. 40% of the ppt must relate to Chemistry. How do I do that if im doing something on particle physics?!! A quick answer would be nice!
Asked by R.Fedex - Sun May 31 21:07:43 2009 - - 1 Answers - 0 Comments
A. Atoms are pieces of the thing Chemists love. Physicists admire the internal junk. The valence is how Chem students observe the quantum nature. Particle physics is related by the "touching" of atoms.
Answered by Radius Maximus - Sun May 31 21:53:47 2009
Q. Doing a ppt presentation. 40% of the ppt must relate to Chemistry. How do I do that if im doing something on particle physics?!! A quick answer would be nice!
Asked by R.Fedex - Sun May 31 21:07:43 2009 - - 1 Answers - 0 Comments
A. Atoms are pieces of the thing Chemists love. Physicists admire the internal junk. The valence is how Chem students observe the quantum nature. Particle physics is related by the "touching" of atoms.
Answered by Radius Maximus - Sun May 31 21:53:47 2009
Education for particle physics and astro physics?
Q. Can you please state what kind of education/requirements is needed for those interested in working in [mainly] particle physics and astro physics? Also, does anyone know how much a particle physicist in a lab make in and out of the U.S.?
Asked by The Writer - Sun Jun 7 10:29:03 2009 - - 1 Answers - 0 Comments
A. You need to study physics obviously and specialize in particle physics, going up to PhD level. In Western Europe typical starting salaries would be of the order of 18-20 kEuro, maxing out to 60 kEuro at the end of a career. A PhD student gets about 10-12 kEuro. I suppose it's more in the US, but so is the cost of living.
Answered by ronwizfr - Wed Jun 10 04:47:04 2009
Q. Can you please state what kind of education/requirements is needed for those interested in working in [mainly] particle physics and astro physics? Also, does anyone know how much a particle physicist in a lab make in and out of the U.S.?
Asked by The Writer - Sun Jun 7 10:29:03 2009 - - 1 Answers - 0 Comments
A. You need to study physics obviously and specialize in particle physics, going up to PhD level. In Western Europe typical starting salaries would be of the order of 18-20 kEuro, maxing out to 60 kEuro at the end of a career. A PhD student gets about 10-12 kEuro. I suppose it's more in the US, but so is the cost of living.
Answered by ronwizfr - Wed Jun 10 04:47:04 2009
what do you think about particle physics?
Q. do you think too much money is wasted on experiments for particle physics? are the theories believable?
Asked by hello - Wed May 30 01:21:45 2007 - - 3 Answers - 0 Comments
A. You ask an outstanding question. Particle physics is a very exciting area of scientific research. Much is being learned about the nature of atoms and molecules, the elementary components that they are made of and how they interact in our world and in the fabric of the universe. Knowing about subatomic particles and their intimate interactions tells us much about matter and energy. It also tells us a great deal about the forces that drive our universe and everything in it. The study of subatomic particles provides reference points to test such theories as Einstein's general relativity and quantum mechanics. One day there will be a grand unified theory, successfully ties general relativity and quantum mechanics together in such fashion… [cont.]
Answered by Bob D - Wed May 30 02:02:37 2007
Q. do you think too much money is wasted on experiments for particle physics? are the theories believable?
Asked by hello - Wed May 30 01:21:45 2007 - - 3 Answers - 0 Comments
A. You ask an outstanding question. Particle physics is a very exciting area of scientific research. Much is being learned about the nature of atoms and molecules, the elementary components that they are made of and how they interact in our world and in the fabric of the universe. Knowing about subatomic particles and their intimate interactions tells us much about matter and energy. It also tells us a great deal about the forces that drive our universe and everything in it. The study of subatomic particles provides reference points to test such theories as Einstein's general relativity and quantum mechanics. One day there will be a grand unified theory, successfully ties general relativity and quantum mechanics together in such fashion… [cont.]
Answered by Bob D - Wed May 30 02:02:37 2007
Where can you get a PhD in particle physics/high energy physics?
Q. What universities offer this if any?
Asked by MTCR - Thu Aug 6 15:27:28 2009 - - 4 Answers - 1 Comments
A. At MIT, Brigham Young University, University of Chicago, Cambridge University, Stanford University. What a wonderful field. My best wishes for you in your studies. It is a wonderful goal. I am positive you will succeed.
Answered by Egypt Sasson - Thu Aug 6 15:31:59 2009
Q. What universities offer this if any?
Asked by MTCR - Thu Aug 6 15:27:28 2009 - - 4 Answers - 1 Comments
A. At MIT, Brigham Young University, University of Chicago, Cambridge University, Stanford University. What a wonderful field. My best wishes for you in your studies. It is a wonderful goal. I am positive you will succeed.
Answered by Egypt Sasson - Thu Aug 6 15:31:59 2009
Particle Physics has become my religion. Does anyone else believe that "god" is in the subatomic interactions?
Q. I'm not just talking about Einsteinian physics, but post-Einsteinian quark-theory and the like. (For those not of the geek set) If we are not as solid as we think and we are exchanging matter and energy with our environment, wouldn't it follow that what we perceive as "god" would actually be the universe moving through us? Griz, depending on the atom.
Asked by Momofthreeboys - Wed Feb 11 01:06:36 2009 - - 15 Answers - 1 Comments
A. I see That (or god as some would call it) everywhere, as the impersonal essence and form of all that exists. Whatever the fundamental nature of manifestation is, whether the superstring or some entity that we have not conceptualized yet, that is what I revere as the ground of manifestation. I am a Hindu and a grad student in physics, and I consider the aim of both to be the same.
Answered by Nerdlinger ~ - Wed Feb 11 01:19:27 2009
Q. I'm not just talking about Einsteinian physics, but post-Einsteinian quark-theory and the like. (For those not of the geek set) If we are not as solid as we think and we are exchanging matter and energy with our environment, wouldn't it follow that what we perceive as "god" would actually be the universe moving through us? Griz, depending on the atom.
Asked by Momofthreeboys - Wed Feb 11 01:06:36 2009 - - 15 Answers - 1 Comments
A. I see That (or god as some would call it) everywhere, as the impersonal essence and form of all that exists. Whatever the fundamental nature of manifestation is, whether the superstring or some entity that we have not conceptualized yet, that is what I revere as the ground of manifestation. I am a Hindu and a grad student in physics, and I consider the aim of both to be the same.
Answered by Nerdlinger ~ - Wed Feb 11 01:19:27 2009
What is the difference between a particle physics experiment and a supercollider experiment?
Q. And what are the main components of each? I thought they were the same thing and the main parts are accelerator and detector. I have a bunch of review questions asking what the difference is though...uh oh lol Any ideas?
Asked by NAOMI F - Wed Feb 11 22:22:04 2009 - - 1 Answers - 0 Comments
A. Particle physics experiments are all experiments involving particles, supercollider experiments are a subgroup withing those experiments. Supercollider experiments deal only with what happens when you smash two particles at each other at enormous speeds. Particle physics encompass those experiments but also include things like measuring the half-life of certain isotopes. If particle physics experiments would be examining a car in how it handles, the fuel consumption, the comfort, the durability and how safe it is in a collision. Then a supercollider experiment would be just the experiment about how safe it is in a collision.
Answered by Michiel C - Thu Feb 12 02:54:33 2009
Q. And what are the main components of each? I thought they were the same thing and the main parts are accelerator and detector. I have a bunch of review questions asking what the difference is though...uh oh lol Any ideas?
Asked by NAOMI F - Wed Feb 11 22:22:04 2009 - - 1 Answers - 0 Comments
A. Particle physics experiments are all experiments involving particles, supercollider experiments are a subgroup withing those experiments. Supercollider experiments deal only with what happens when you smash two particles at each other at enormous speeds. Particle physics encompass those experiments but also include things like measuring the half-life of certain isotopes. If particle physics experiments would be examining a car in how it handles, the fuel consumption, the comfort, the durability and how safe it is in a collision. Then a supercollider experiment would be just the experiment about how safe it is in a collision.
Answered by Michiel C - Thu Feb 12 02:54:33 2009
What is the best source of information on particle physics?
Q. I'm lookin' to get learned up on subatomic particles. Suggestions for books, articles and websites are all welcome. Thanks.
Asked by habaceeba - Fri May 19 12:18:51 2006 - - 2 Answers - 0 Comments
A. Depends how much detail you are looking for. If it's not for an exam but just for personal knowledge I highly recommend which will give you a nice foundation for it. I have an exam on Nuclear and Particle physics on Monday...but I'm just learning it from all my lecture notes and notes the professor gave us.
Answered by the_bendude - Fri May 19 12:29:08 2006
Q. I'm lookin' to get learned up on subatomic particles. Suggestions for books, articles and websites are all welcome. Thanks.
Asked by habaceeba - Fri May 19 12:18:51 2006 - - 2 Answers - 0 Comments
A. Depends how much detail you are looking for. If it's not for an exam but just for personal knowledge I highly recommend which will give you a nice foundation for it. I have an exam on Nuclear and Particle physics on Monday...but I'm just learning it from all my lecture notes and notes the professor gave us.
Answered by the_bendude - Fri May 19 12:29:08 2006
Particle physics; Structure of the following particles in terms of quarks?
Q. Hi, I need help with giving the structure of the following particles in terms of quarks: electron, neutron, proton, positron, antiproton. I've researched through the books I have, and looked on the internet but struggled to find anything I can understand?! Somebody please help!
Asked by DJ - Wed Apr 1 16:25:19 2009 - - 2 Answers - 0 Comments
A. The negatively charged electron is not a member of the quark family it is a member of the lepton family. Similarly, the positron is a positively charged 'electron' and it too is a member of the lepton family. Both these particles are elementary particles in their own right and therefore have no sub-content such as quarks! A neutron has the following quark composition: - 1 up quark, 2 down quarks A proton has the following quark composition: - 2 up quarks, 1 down quark A anti-proton has the following quark composition: - 2 up antiquarks, 1 down antiquark
Answered by . - Thu Apr 2 06:27:14 2009
Q. Hi, I need help with giving the structure of the following particles in terms of quarks: electron, neutron, proton, positron, antiproton. I've researched through the books I have, and looked on the internet but struggled to find anything I can understand?! Somebody please help!
Asked by DJ - Wed Apr 1 16:25:19 2009 - - 2 Answers - 0 Comments
A. The negatively charged electron is not a member of the quark family it is a member of the lepton family. Similarly, the positron is a positively charged 'electron' and it too is a member of the lepton family. Both these particles are elementary particles in their own right and therefore have no sub-content such as quarks! A neutron has the following quark composition: - 1 up quark, 2 down quarks A proton has the following quark composition: - 2 up quarks, 1 down quark A anti-proton has the following quark composition: - 2 up antiquarks, 1 down antiquark
Answered by . - Thu Apr 2 06:27:14 2009
Has particle physics become just an exercise in trying to remember exotic names?
Q. Up, Down, Top, Bottom, Strange, Charmed Quarks, Baryons, Mesons, Kaons, Gluons, Leptons.. I think I have to go lie down for a while.. Yes.. I did forget Pions, Fermions and hadrons.. think I need two Asperons and a darkened room..
Asked by A pale imitation of The Dame - Wed Jul 2 12:35:19 2008 - - 5 Answers - 0 Comments
A. If you think it's bad now, it was worse before Gell-Mann organized everything and all the baryons and mesons were thought to be fundamental. Now you can organize it all like that cool "fundamental particles and interactions" poster that everyone has. 6 quarks --udtbcs 6 leptons--e mu tau, and 3 associated neutrinos 4 electroweak bosons 3 massive --W+ W- and Z 1 massless--photon 8 gluons 1 graviton? 1 higgs? and associated antiparticles Is that so bad? Maybe at first. But memorizing stuff is by far the least painful aspect of particle physics--that would be quantum field theory. And chemists memorize the periodic table--this is easier than that!
Answered by ( )Mistress Bekki - Wed Jul 2 12:42:55 2008
Q. Up, Down, Top, Bottom, Strange, Charmed Quarks, Baryons, Mesons, Kaons, Gluons, Leptons.. I think I have to go lie down for a while.. Yes.. I did forget Pions, Fermions and hadrons.. think I need two Asperons and a darkened room..
Asked by A pale imitation of The Dame - Wed Jul 2 12:35:19 2008 - - 5 Answers - 0 Comments
A. If you think it's bad now, it was worse before Gell-Mann organized everything and all the baryons and mesons were thought to be fundamental. Now you can organize it all like that cool "fundamental particles and interactions" poster that everyone has. 6 quarks --udtbcs 6 leptons--e mu tau, and 3 associated neutrinos 4 electroweak bosons 3 massive --W+ W- and Z 1 massless--photon 8 gluons 1 graviton? 1 higgs? and associated antiparticles Is that so bad? Maybe at first. But memorizing stuff is by far the least painful aspect of particle physics--that would be quantum field theory. And chemists memorize the periodic table--this is easier than that!
Answered by ( )Mistress Bekki - Wed Jul 2 12:42:55 2008
what classes need to be taken before taking particle physics?
Q. Im thinking about being a particle physicist when i am older im a teen right now and i am wondering what classes im going to have to take in college to become a particle physicitst.
Asked by muboy2 - Wed Sep 17 13:56:34 2008 - - 1 Answers - 0 Comments
A. You're getting ahead of yourself. For the time being just take as many science and math classes as are available to you. Once you get into a college, that you've researched to be sure they offer the degree you're seeking you just follow their specific regimen for that degree. It will vary from school to school.
Answered by Gabriel - Wed Sep 17 14:05:08 2008
Q. Im thinking about being a particle physicist when i am older im a teen right now and i am wondering what classes im going to have to take in college to become a particle physicitst.
Asked by muboy2 - Wed Sep 17 13:56:34 2008 - - 1 Answers - 0 Comments
A. You're getting ahead of yourself. For the time being just take as many science and math classes as are available to you. Once you get into a college, that you've researched to be sure they offer the degree you're seeking you just follow their specific regimen for that degree. It will vary from school to school.
Answered by Gabriel - Wed Sep 17 14:05:08 2008
What is antimatter in particle physics?
Q. Please, I would like a concept, and intricate, yet simple description on what antimatter is, and what its use is in the future.
Asked by Ha M - Sun Aug 30 17:55:41 2009 - - 1 Answers - 0 Comments
A. For every particle, there is an anti particle. When matter and anti matter collide they will completely annihilate eachother and turn into pure energy. We do have a small amount anti matter today. Its very expensive to make, but will be the future of bombs
Answered by Free Thinker - Sun Aug 30 18:02:24 2009
Q. Please, I would like a concept, and intricate, yet simple description on what antimatter is, and what its use is in the future.
Asked by Ha M - Sun Aug 30 17:55:41 2009 - - 1 Answers - 0 Comments
A. For every particle, there is an anti particle. When matter and anti matter collide they will completely annihilate eachother and turn into pure energy. We do have a small amount anti matter today. Its very expensive to make, but will be the future of bombs
Answered by Free Thinker - Sun Aug 30 18:02:24 2009
Which University is the BEST for Mechanical Engineering and Particle Physics?
Q. Please, My whole career is based on this question...Help me in finding the best University for these two subjects...Thank You!
Asked by Suhel Baggins - Wed Jun 13 12:11:15 2007 - - 2 Answers - 0 Comments
A. purdue, mit, caltech
Answered by Matt - Wed Jun 13 14:20:05 2007
Q. Please, My whole career is based on this question...Help me in finding the best University for these two subjects...Thank You!
Asked by Suhel Baggins - Wed Jun 13 12:11:15 2007 - - 2 Answers - 0 Comments
A. purdue, mit, caltech
Answered by Matt - Wed Jun 13 14:20:05 2007
I'm looking for a good book on particle physics.?
Q. I'm looking for a good book on particle physics, that includes recent discoveries. Not a textbook, just a book!
Asked by Joe F - Fri May 23 02:11:22 2008 - - 3 Answers - 0 Comments
A. Here's a fun read, written in a language accessible to ALL. It was written by a physics Nobel Laureate, Martinus Veltman: 'Facts and Mysteries in Elementary Particle Physics.' It's not THAT outdated, but I think that if you want the most recent discoveries (less than 3 years or so), you might need to scan the internet.
Answered by unknown - Fri May 23 15:28:32 2008
Q. I'm looking for a good book on particle physics, that includes recent discoveries. Not a textbook, just a book!
Asked by Joe F - Fri May 23 02:11:22 2008 - - 3 Answers - 0 Comments
A. Here's a fun read, written in a language accessible to ALL. It was written by a physics Nobel Laureate, Martinus Veltman: 'Facts and Mysteries in Elementary Particle Physics.' It's not THAT outdated, but I think that if you want the most recent discoveries (less than 3 years or so), you might need to scan the internet.
Answered by unknown - Fri May 23 15:28:32 2008
What's an easy way to explain what "particle physics" is to a sixth grader??
Q. What's an easy way to explain what "particle physics" is to a sixth grader??
Asked by wow - Mon Nov 26 16:00:02 2007 - - 2 Answers - 0 Comments
A. It's physics that focuses on stuff that happens with the things that make up atoms.
Answered by David - Mon Nov 26 16:23:28 2007
Q. What's an easy way to explain what "particle physics" is to a sixth grader??
Asked by wow - Mon Nov 26 16:00:02 2007 - - 2 Answers - 0 Comments
A. It's physics that focuses on stuff that happens with the things that make up atoms.
Answered by David - Mon Nov 26 16:23:28 2007
I am very much interested in Physics. Where do I start ? They talk about particle physics, quantam, et al?
Q. I know nothing
Asked by nemo - Tue Sep 4 03:59:57 2007 - - 10 Answers - 0 Comments
A. If you don't know much about it, you have to start with Classical Physics. (Newton's Laws) Then you can work your way up.
Answered by Robert D - Tue Sep 4 04:03:05 2007
Q. I know nothing
Asked by nemo - Tue Sep 4 03:59:57 2007 - - 10 Answers - 0 Comments
A. If you don't know much about it, you have to start with Classical Physics. (Newton's Laws) Then you can work your way up.
Answered by Robert D - Tue Sep 4 04:03:05 2007
what is a good school for an elementary particle physics degree?
Q. and what is the selectivity of those schools? just for clarification, i am fully expecting to get a doctorate in this field of study
Asked by Tim - Mon Sep 14 01:36:34 2009 - - 2 Answers - 0 Comments
A. If one specializes that much at the undergraduate level, MIT, CIT and UC Berkeley are probably best. They would certainly be best for graduate work. However, there are many more new Ph.D.s in particle physics than there are appropriate jobs for them and about the only thing you can do with just an undergraduate degree in physics is teach it in high school.
Answered by ownpool - Mon Sep 14 02:22:13 2009
Q. and what is the selectivity of those schools? just for clarification, i am fully expecting to get a doctorate in this field of study
Asked by Tim - Mon Sep 14 01:36:34 2009 - - 2 Answers - 0 Comments
A. If one specializes that much at the undergraduate level, MIT, CIT and UC Berkeley are probably best. They would certainly be best for graduate work. However, there are many more new Ph.D.s in particle physics than there are appropriate jobs for them and about the only thing you can do with just an undergraduate degree in physics is teach it in high school.
Answered by ownpool - Mon Sep 14 02:22:13 2009
Determining the velocity of a charged particle physics help!?
Q. i am having problems getting the right answer to this problem any help would be appreciated. A particle with a charge of = -5.80 nC is moving in a uniform magnetic field of B=( -1.23 T) z^ . The magnetic force on the particle is measured to be F= 7.60 10 7 N) y^ calculate the x component of the velocity of the particle is m/s? can Vy and Vz, the y and z components of velocity be determined by measuring the force?
Asked by cassadaga08 - Sun Jul 20 14:44:16 2008 - - 1 Answers - 0 Comments
A. F = q(v x B) (x is vector cross product) F(y) = q(v(z)B(x) - v(x)B(z)) Since B(x) = 0, v(z) cannot be determined from F(y), and F(y) = -qv(x)B(z) ==> v(x) = -F(y)/(qB(z)) I get v(x) = +106.5321 m/s
Answered by kirchwey - Mon Jul 21 15:49:03 2008
Q. i am having problems getting the right answer to this problem any help would be appreciated. A particle with a charge of = -5.80 nC is moving in a uniform magnetic field of B=( -1.23 T) z^ . The magnetic force on the particle is measured to be F= 7.60 10 7 N) y^ calculate the x component of the velocity of the particle is m/s? can Vy and Vz, the y and z components of velocity be determined by measuring the force?
Asked by cassadaga08 - Sun Jul 20 14:44:16 2008 - - 1 Answers - 0 Comments
A. F = q(v x B) (x is vector cross product) F(y) = q(v(z)B(x) - v(x)B(z)) Since B(x) = 0, v(z) cannot be determined from F(y), and F(y) = -qv(x)B(z) ==> v(x) = -F(y)/(qB(z)) I get v(x) = +106.5321 m/s
Answered by kirchwey - Mon Jul 21 15:49:03 2008
Particle Physics Starting Point?
Q. Hi, I am very interested in particle physics. I'd like to have a better understanding of this. My mathematics etc is not very strong. Are there any good books/websites that are a good starting point for learning the "basics" of particle physics? Something to explain the relations between each type of particle?
Asked by Ater Atra Atrum - Wed Oct 10 00:38:15 2007 - - 1 Answers - 0 Comments
A. I use this textbook when I took particle physics lecture: the author is: David Griffiths. the title is Introduction to Elementary Particles. or just use any textbook with something like "Introduction to Particle Physics" in its title. Besides, many popular physics book like A Brief History of Time, The First Three Minutes, The Fabric of the Universe, etc explain some details about particle physics without a great deal about its mathematics. ok, have fun with particle physics=P
Answered by Hanciong - Wed Oct 10 01:32:12 2007
Q. Hi, I am very interested in particle physics. I'd like to have a better understanding of this. My mathematics etc is not very strong. Are there any good books/websites that are a good starting point for learning the "basics" of particle physics? Something to explain the relations between each type of particle?
Asked by Ater Atra Atrum - Wed Oct 10 00:38:15 2007 - - 1 Answers - 0 Comments
A. I use this textbook when I took particle physics lecture: the author is: David Griffiths. the title is Introduction to Elementary Particles. or just use any textbook with something like "Introduction to Particle Physics" in its title. Besides, many popular physics book like A Brief History of Time, The First Three Minutes, The Fabric of the Universe, etc explain some details about particle physics without a great deal about its mathematics. ok, have fun with particle physics=P
Answered by Hanciong - Wed Oct 10 01:32:12 2007
Related to particle physics and photonics?
Q. What should be the direction of the emission of the two or more photons when an electron and a positron collide, with the paths they followed making an angle of 90* at the point of collision?
Asked by The inquistive - Sun Aug 26 02:00:56 2007 - - 3 Answers - 0 Comments
A. Conservation of energy dictates that the angle will be 180 degrees in the CM frame. What that is exactly in the rest frame will depend on the velocities of the incoming particles.
Answered by ( )Mistress Bekki - Sun Aug 26 02:27:55 2007
Q. What should be the direction of the emission of the two or more photons when an electron and a positron collide, with the paths they followed making an angle of 90* at the point of collision?
Asked by The inquistive - Sun Aug 26 02:00:56 2007 - - 3 Answers - 0 Comments
A. Conservation of energy dictates that the angle will be 180 degrees in the CM frame. What that is exactly in the rest frame will depend on the velocities of the incoming particles.
Answered by ( )Mistress Bekki - Sun Aug 26 02:27:55 2007
Physics: A particle is uncharged and is thrown vertically upward from ground level with a speed of 26.0 m/s?
Q. A particle is uncharged and is thrown vertically upward from ground level with a speed of 26.0 m/s. As a result, it attains a maximum height h. The particle is then given a positive charge +q and reaches the same maximum height h when thrown vertically upward with a speed of 31.0 m/s. The electric potential at the height h exceeds the electric potential at ground level. Finally, the particle is given a negative charge -q. Ignoring air resistance, determine the speed with which the negatively charged particle must be thrown vertically upward, so that it attains exactly the maximum height h. In all three situations, be sure to include the effect of gravity. ___m/s? I still do not know where to start. What formula can i use? more help please. [cont.]
Asked by Hera08 - Sat Sep 15 11:38:15 2007 - - 1 Answers - 1 Comments
A. The easiest way to do this will be to use conservation of energy. In all cases, your particle leaves your hand with a kinetic energy of 1/2 mv^2 (v for velocity). The gravitational potential energy is mgh; the electric potential energy is qV (V for voltage). The height the particle reaches in all three cases is the same; the difference is in the initial speed and in the electric potential energy. In the second case, the additional kinetic energy is needed to offset the additional potential energy due to the electric field; knowing that the potential energy has the opposite sign when the charge has the opposite sign should allow you to figure out how much potential energy, and therefore how much speed, the particle needs in the last case.
Answered by uusuzanne - Sun Sep 16 18:52:52 2007
Q. A particle is uncharged and is thrown vertically upward from ground level with a speed of 26.0 m/s. As a result, it attains a maximum height h. The particle is then given a positive charge +q and reaches the same maximum height h when thrown vertically upward with a speed of 31.0 m/s. The electric potential at the height h exceeds the electric potential at ground level. Finally, the particle is given a negative charge -q. Ignoring air resistance, determine the speed with which the negatively charged particle must be thrown vertically upward, so that it attains exactly the maximum height h. In all three situations, be sure to include the effect of gravity. ___m/s? I still do not know where to start. What formula can i use? more help please. [cont.]
Asked by Hera08 - Sat Sep 15 11:38:15 2007 - - 1 Answers - 1 Comments
A. The easiest way to do this will be to use conservation of energy. In all cases, your particle leaves your hand with a kinetic energy of 1/2 mv^2 (v for velocity). The gravitational potential energy is mgh; the electric potential energy is qV (V for voltage). The height the particle reaches in all three cases is the same; the difference is in the initial speed and in the electric potential energy. In the second case, the additional kinetic energy is needed to offset the additional potential energy due to the electric field; knowing that the potential energy has the opposite sign when the charge has the opposite sign should allow you to figure out how much potential energy, and therefore how much speed, the particle needs in the last case.
Answered by uusuzanne - Sun Sep 16 18:52:52 2007
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