Notices
Results 1 to 7 of 7

Thread: Van der Waals force (Lenard-Jones)

  1. #1 Van der Waals force (Lenard-Jones) 
    Junior Member
    Join Date
    May 2013
    Posts
    4
    Hi everyone

    I'd like to know the Lennard-Jones potential energy is just for symmetric particles or we can use it for asymmetric forces too? If not how can I define the potential energy between two asymmetric particles?

    Thanks
    Reply With Quote  
     

  2. #2  
    Senior Member
    Join Date
    Jan 2013
    Posts
    504
    Quote Originally Posted by Ferra View Post
    Hi everyone

    I'd like to know the Lennard-Jones potential energy is just for symmetric particles or we can use it for asymmetric forces too? If not how can I define the potential energy between two asymmetric particles?

    Thanks
    What in the hell does this have to do with either special or general relativity ? Also, why do you think that the empirical model has any assumption of symmetry ? What is an asymmetric force ? (a violation of Newton's Third Law perhaps ?)
    Are you sober ?
    Reply With Quote  
     

  3. #3  
    Junior Member
    Join Date
    May 2013
    Posts
    4
    Quote Originally Posted by DrRocket View Post
    What in the hell does this have to do with either special or general relativity ? Also, why do you think that the empirical model has any assumption of symmetry ? What is an asymmetric force ? (a violation of Newton's Third Law perhaps ?)
    Are you sober ?
    I really appreciate if you respect others.. I thought it's an academic and scientific forum with some academic members.. Suppose I'm not familiar with this subject, you are not responsible to answer all the questions in this forum if you don't have the patience. By the way, by asymmetric force I mean when i has influence on j but not vice-versa. For example I'd like to know two nano structures that have different size will interact with each other equally?
    Reply With Quote  
     

  4. #4  
    Senior Member
    Join Date
    Jan 2013
    Posts
    504
    Quote Originally Posted by Ferra View Post
    I really appreciate if you respect others.. I thought it's an academic and scientific forum with some academic members.. Suppose I'm not familiar with this subject, you are not responsible to answer all the questions in this forum if you don't have the patience. By the way, by asymmetric force I mean when i has influence on j but not vice-versa. For example I'd like to know two nano structures that have different size will interact with each other equally?
    You can respect others by presenting clear questions about which you have taken the trouble to think a bit, thereby jutifying the time and trouble that is required to present a response. Remember, it is you who are requesting the benefits of thhe expertise of others, at no cost to you. If you do not feel it obligatory on you to invest that effort, then please feel free to go straight to hell.
    Reply With Quote  
     

  5. #5  
    mvb
    mvb is offline
    Senior Member
    Join Date
    Jan 2013
    Location
    Delaware
    Posts
    228
    Quote Originally Posted by Ferra View Post
    By the way, by asymmetric force I mean when i has influence on j but not vice-versa. For example I'd like to know two nano structures that have different size will interact with each other equally?
    By that definition there are no asymmetric forces, since Newton's Third Law says that any two objects exert force on each other which are equal in size but opposite in direction. If you identify all the forces accurately, two nano structures must exert equal but opposite forces on each other. However, if they are in a medium, there is no requirement that the medium exert equal forces on each of them.
    Last edited by Markus Hanke; 05-02-2013 at 06:51 AM.
    Reply With Quote  
     

  6. #6  
    Junior Member
    Join Date
    May 2013
    Posts
    4
    Quote Originally Posted by mvb View Post
    By that definition there are no asymmetric forces, since Newton's Third Law says that any two objects exert force on each other which are equal in size but opposite in direction. If you identify all the forces accurately, two nano structures must exert equal but opposite forces on each other. However, if they are in a medium, there is no requirement that the medium exert equal forces on each of them.
    Thank you for your help.
    Reply With Quote  
     

  7. #7  
    Administrator Markus Hanke's Avatar
    Join Date
    Jan 2013
    Location
    Ireland
    Posts
    1,378
    Moved to Quantum Physics.
    Reply With Quote  
     

Posting Permissions
  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •