Notices
Results 1 to 5 of 5

Thread: electromagnetic force

  1. #1 electromagnetic force 
    Forum Freshman
    Join Date
    May 2009
    Posts
    23
    I keep reading that all matter is held together by the electromagnetic force. How exactly does this happen in relation to our own bodies?


    Reply With Quote  
     

  2.  
     

  3. #2  
    Reptile Dysfunction drowsy turtle's Avatar
    Join Date
    Mar 2009
    Location
    UK
    Posts
    2,255
    Attraction of electrons to protons would be a key way.

    Also, all chemical bonds and forces within the body are possible due to the electromagnetic force.

    e.g. hydrogen bonds in water
    e.g. bonds between monomers in proteins, fats and carbohydrates etc.


    "The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at or repair." ~ Douglas Adams
    Reply With Quote  
     

  4. #3 Re: electromagnetic force 
    . DrRocket's Avatar
    Join Date
    Aug 2008
    Posts
    5,486
    Quote Originally Posted by greymatt
    I keep reading that all matter is held together by the electromagnetic force. How exactly does this happen in relation to our own bodies?
    There are four known forces.

    The strong and weak forces act within the nucleus and control beta decay, hold quarks together in the proton and neutron and keep the proton and neutron within the nucleus under most circumstances.

    Gravity acts as a universally attractive force between masses.

    The electromagnetic force acts between charged particles, and is responsible for most of the physics and chemistry of everyday experience. It explains all chemical bonds, for instance. It is also responsible for keeping you from falling through the floor. Between two charged particles the electromagnetic force is many orders of magnitude stronger than gravity. Gravity takes over in the case of large numbers of particles, approximately equally divided between positive and negative electric charges.
    Reply With Quote  
     

  5. #4  
    Forum Freshman
    Join Date
    May 2009
    Posts
    23
    I'm not sure how the e/m force arose in presumably the early universe.
    What would happen if it were stronger or weaker?
    2 big questions that I am struggling with.
    Reply With Quote  
     

  6. #5  
    . DrRocket's Avatar
    Join Date
    Aug 2008
    Posts
    5,486
    Quote Originally Posted by greymatt
    I'm not sure how the e/m force arose in presumably the early universe.
    What would happen if it were stronger or weaker?
    2 big questions that I am struggling with.
    Nobody else knows how it arose either. That would probably require a successful "theory of everything" -- a unified field theory that would include the strong, electroweak and gravitational forces.

    You can expect to strugle quite a bit with that question, and probably not get to an answer. That problem is occupying many of the finest minds on the planet, and they are apparently not near a solution either, although there has been some interesting theoretical work.

    Since the e/m force governs atomic structure and molecular bonds if the force were very much stronger or very much weaker things might be quite different. Much of the universe is plasma and the energy required for ionization is determined by the electromagnetic force, so you might ponder the implications in that regard if the force were weaker or stronger.
    Reply With Quote  
     

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