• Lucid Dreaming - Dream Views




    Page 1 of 2 1 2 LastLast
    Results 1 to 25 of 49
    Like Tree3Likes

    Thread: Energy

    1. #1
      Member Achievements:
      Made lots of Friends on DV Populated Wall Tagger First Class Created Dream Journal Referrer Silver 1000 Hall Points Veteran First Class

      Join Date
      Apr 2011
      Posts
      1,056
      Likes
      697
      DJ Entries
      8

      Energy

      We use the word 'energy' a lot in all fields of science, but what is it? How do we define it? I find that it is actually quite difficult to pin down a specific definition, because it can come in many difference guises.
      So, what is energy?

    2. #2
      Xei
      UnitedKingdom Xei is offline
      Banned
      Join Date
      Aug 2005
      Posts
      9,984
      Likes
      3082
      Energy is the ability to 'do work'. Doing work means applying a force over a distance.

      If you lift a brick which weighs 1 Newton by 1 metre it gains 1 Joule of potential energy.

    3. #3
      D.V. Editor-in-Chief Original Poster's Avatar
      Join Date
      Jun 2006
      LD Count
      Lucid Now
      Gender
      Location
      3D
      Posts
      8,263
      Likes
      4135
      DJ Entries
      11
      What is an electromagnetic field?

      Everything works out in the end, sometimes even badly.


    4. #4
      Xei
      UnitedKingdom Xei is offline
      Banned
      Join Date
      Aug 2005
      Posts
      9,984
      Likes
      3082
      It's a kind of combination of electric fields and magnetic fields, which describe vectors at every point in space, characterising the electromagnetic forces due in general to moving charges.

    5. #5
      D.V. Editor-in-Chief Original Poster's Avatar
      Join Date
      Jun 2006
      LD Count
      Lucid Now
      Gender
      Location
      3D
      Posts
      8,263
      Likes
      4135
      DJ Entries
      11
      Can you give me an example of how this works?

      Everything works out in the end, sometimes even badly.


    6. #6
      Xei
      UnitedKingdom Xei is offline
      Banned
      Join Date
      Aug 2005
      Posts
      9,984
      Likes
      3082
      Sure, imagine a point charge of strength Q at the origin. This creates an electric field defined by vectors at every point other than the origin of length Q/kr^2 where r is the distance from the origin, pointing outwards from the origin. These describe the force on a unit point charge. I hope you learned a lot today.

    7. #7
      D.V. Editor-in-Chief Original Poster's Avatar
      Join Date
      Jun 2006
      LD Count
      Lucid Now
      Gender
      Location
      3D
      Posts
      8,263
      Likes
      4135
      DJ Entries
      11
      Not yet. Please use laymen's terms.

      Everything works out in the end, sometimes even badly.


    8. #8
      Xei
      UnitedKingdom Xei is offline
      Banned
      Join Date
      Aug 2005
      Posts
      9,984
      Likes
      3082
      I was using layman's terms. You can look all of them on Wikipedia, they are simple concepts.

      Charge is just a numerical property of objects. Q is such a number.

      A vector is a length with a direction, so in other words an arrow.

      Force is a type of vector. When a force is applied to an object, that object accelerates in the direction of the vector with acceleration proportional to the length of the vector and inversely proportional to the mass of the object.

      So what we have is a stationary particle with a charge creating virtual arrows at every point in space (this is the electric field). The arrows describe how a particle of unit mass and charge will accelerate. They point away from the stationary particle and their length decreases the further away they are, and they are bigger if the charge is bigger.

    9. #9
      Member Achievements:
      Made lots of Friends on DV Populated Wall Tagger First Class Created Dream Journal Referrer Silver 1000 Hall Points Veteran First Class

      Join Date
      Apr 2011
      Posts
      1,056
      Likes
      697
      DJ Entries
      8
      Quote Originally Posted by Xei View Post
      Energy is the ability to 'do work'.
      How do you relate work done to other forms of energy such as electric/nuclear/magnetic energy?

    10. #10
      Banned
      Join Date
      May 2008
      LD Count
      don't know
      Gender
      Posts
      1,602
      Likes
      1144
      DJ Entries
      17
      The electromagnetic and nuclear forces applied over a distance?

    11. #11
      Banned
      Join Date
      May 2008
      LD Count
      don't know
      Gender
      Posts
      1,602
      Likes
      1144
      DJ Entries
      17
      Energy is kind of hard to pin down. The question of "what is it?" is especially interesting because of the fact that it's quantized. Pauli's Exclusion principle shows these discrete levels have some real, awesome, and diverse consequences.

    12. #12
      D.V. Editor-in-Chief Original Poster's Avatar
      Join Date
      Jun 2006
      LD Count
      Lucid Now
      Gender
      Location
      3D
      Posts
      8,263
      Likes
      4135
      DJ Entries
      11
      Electric fields are created by differences in voltage: the higher the voltage, the stronger will be the resultant field. Magnetic fields are created when electric current flows: the greater the current, the stronger the magnetic field. An electric field will exist even when there is no current flowing. If current does flow, the strength of the magnetic field will vary with power consumption but the electric field strength will be constant.
      A simple analogy should help to illustrate the concept: Tie a long rope to a door handle and keep hold of the free end. Moving it up and then down slowly will generate a single big wave; more rapid motion will generate a whole series of small waves. The length of the rope remains constant, therefore, the more waves you generate (higher frequency) the smaller will be the distance between them (shorter wavelength).
      Plugging a wire into an outlet creates electric fields in the air surrounding the appliance. The higher the voltage the stronger the field produced. Since the voltage can exist even when no current is flowing, the appliance does not have to be turned on for an electric field to exist in the room surrounding it.
      Magnetic fields are created only when the electric current flows. Magnetic fields and electric fields then exist together in the room environment. The greater the current the stronger the magnetic field. High voltages are used for the transmission and distribution of electricity whereas relatively low voltages are used in the home. The voltages used by power transmission equipment vary little from day to day, currents through a transmission line vary with power consumption.
      I looked it up here. WHO | What are electromagnetic fields?

      Everything works out in the end, sometimes even badly.


    13. #13
      Xei
      UnitedKingdom Xei is offline
      Banned
      Join Date
      Aug 2005
      Posts
      9,984
      Likes
      3082
      Erm... good for you bro.
      cmind likes this.

    14. #14
      D.V. Editor-in-Chief Original Poster's Avatar
      Join Date
      Jun 2006
      LD Count
      Lucid Now
      Gender
      Location
      3D
      Posts
      8,263
      Likes
      4135
      DJ Entries
      11
      I don't think you understand half the shit you know.
      cmind likes this.

      Everything works out in the end, sometimes even badly.


    15. #15
      Member Achievements:
      Created Dream Journal Referrer Bronze 5000 Hall Points Tagger First Class Populated Wall Veteran First Class
      Arra's Avatar
      Join Date
      Jan 2011
      Posts
      3,838
      Likes
      3886
      DJ Entries
      50
      For some reason I find this thread and Xei's reactions, and people's reactions to his posts in general, fucking hilarious.

      As for energy, the thing is, it isn't a 'thing'. There are no energy particles, as is often imagined. The reality is that some matter accelerates, some objects have potential energy, etc. When something bumps into something else, that other thing accelerates, then decelerates, and heat and sound result. It's all quantifiable, so that the initial energy equals the sum of the final energies, so it's easy to put the 'energy' label on it, as though it's a thing. Even the fact that energy is 'transferred' is kind of an illusion, but it mathematically works out that way, so it's easy to think of it like that.

      I could be wrong though. Correct me if I am. I've told only one person my viewpoint on this before and he disagreed.
      tommo likes this.

    16. #16
      Banned
      Join Date
      Dec 2010
      Gender
      Posts
      1,590
      Likes
      521
      Quote Originally Posted by Dianeva View Post
      For some reason I find this thread and Xei's reactions, and people's reactions to his posts in general, fucking hilarious.
      We all get a laugh from the giant small boner Xei gets every time he has the opportunity to demonstrate his knowledge.

    17. #17
      Member Achievements:
      Created Dream Journal Referrer Bronze 5000 Hall Points Tagger First Class Populated Wall Veteran First Class
      Arra's Avatar
      Join Date
      Jan 2011
      Posts
      3,838
      Likes
      3886
      DJ Entries
      50
      Quote Originally Posted by cmind View Post
      We all get a laugh from the giant small boner Xei gets every time he has the opportunity to demonstrate his knowledge.
      I didn't see it in this thread. He acts pretty modest about it actually. Of course there's going to be some pride... but he isn't as bad as others.

    18. #18
      Xei
      UnitedKingdom Xei is offline
      Banned
      Join Date
      Aug 2005
      Posts
      9,984
      Likes
      3082
      Quote Originally Posted by Omnis Dei View Post
      I don't think you understand half the shit you know.
      I don't think you know anything. What is this comment even based on rofl, you repeatedly asked random questions and I repeatedly answered them clearly.
      Last edited by Xei; 12-25-2011 at 08:01 AM.

    19. #19
      D.V. Editor-in-Chief Original Poster's Avatar
      Join Date
      Jun 2006
      LD Count
      Lucid Now
      Gender
      Location
      3D
      Posts
      8,263
      Likes
      4135
      DJ Entries
      11
      Clearly your idea of clearly is a matter of opinion. I got the impression that you were listing qualities and giving book definitions but were unable to describe what an EM field actually is, in reality. This is a classic activity by people that don't understand what they've learned. You spent too much time writing down answers and not enough time considering what they mean.
      Last edited by Omnis Dei; 12-25-2011 at 08:48 AM.

      Everything works out in the end, sometimes even badly.


    20. #20
      Banned
      Join Date
      May 2008
      LD Count
      don't know
      Gender
      Posts
      1,602
      Likes
      1144
      DJ Entries
      17
      You must be talking about the whole scientific community then, because that's the definition of a field.

    21. #21
      D.V. Editor-in-Chief Original Poster's Avatar
      Join Date
      Jun 2006
      LD Count
      Lucid Now
      Gender
      Location
      3D
      Posts
      8,263
      Likes
      4135
      DJ Entries
      11
      >.>

      I did not say Xei was lying. I said it's revealing that Xei has no clue what he's talking about when he can only explain something by reciting the definition.

      Everything works out in the end, sometimes even badly.


    22. #22
      Banned
      Join Date
      May 2008
      LD Count
      don't know
      Gender
      Posts
      1,602
      Likes
      1144
      DJ Entries
      17
      How else would you explain something?

    23. #23
      D.V. Editor-in-Chief Original Poster's Avatar
      Join Date
      Jun 2006
      LD Count
      Lucid Now
      Gender
      Location
      3D
      Posts
      8,263
      Likes
      4135
      DJ Entries
      11
      I'd use terminology that more effectively conveys the idea rather than define it, such as an example.

      Everything works out in the end, sometimes even badly.


    24. #24
      Ad absurdum Achievements:
      1 year registered 1000 Hall Points Made lots of Friends on DV Referrer Bronze Veteran First Class
      Spartiate's Avatar
      Join Date
      Jul 2007
      Gender
      Location
      Block 4500-7000
      Posts
      4,825
      Likes
      1112
      Quote Originally Posted by Omnis Dei View Post
      Can you give me an example of how this works?
      Quote Originally Posted by Xei View Post
      Sure, imagine a point charge of strength Q at the origin. This creates an electric field defined by vectors at every point other than the origin of length Q/kr^2 where r is the distance from the origin, pointing outwards from the origin. These describe the force on a unit point charge. I hope you learned a lot today.
      .

    25. #25
      D.V. Editor-in-Chief Original Poster's Avatar
      Join Date
      Jun 2006
      LD Count
      Lucid Now
      Gender
      Location
      3D
      Posts
      8,263
      Likes
      4135
      DJ Entries
      11
      Right. That part made no sense to me. That's why I had to look it up on my own and ended up posting the link to what I looked up in order to help other people who also couldn't comprehend what an EM field was or how it works based on that definition. I don't see how anyone can read that and take meaning from it unless they've already taken a lecture. I find Xei's description vague at best.
      Last edited by Omnis Dei; 12-25-2011 at 09:29 AM.

      Everything works out in the end, sometimes even badly.


    Page 1 of 2 1 2 LastLast

    Similar Threads

    1. dream energy vs. sexual energy
      By opalwolf in forum General Lucid Discussion
      Replies: 9
      Last Post: 02-26-2011, 05:18 AM
    2. Too much energy..
      By legit in forum Introduction Zone
      Replies: 10
      Last Post: 09-10-2008, 01:15 AM
    3. I WANT TO SEE ENERGY!!!!!!!
      By KalmaH in forum Lucid Experiences
      Replies: 22
      Last Post: 06-07-2004, 06:13 AM

    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
    •