What is Interactions: Definition and 290 Discussions

Interaction is a kind of action that occurs as two or more objects have an effect upon one another. The idea of a two-way effect is essential in the concept of interaction, as opposed to a one-way causal effect. Closely related terms are interactivity and interconnectivity, of which the latter deals with the interactions of interactions within systems: combinations of many simple interactions can lead to surprising emergent phenomena. Interaction has different tailored meanings in various sciences.

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  1. E

    Fundamental Interactions Problem

    Homework Statement Imagine that I throw a ball toward the floor. It hits the floor and rebounds upward. What type of fundamental interaction between the atoms of the floor and the ball causes the ball to rebound upward? a. Strong nuclear b. Electromagnetic c. Weak nuclear...
  2. G

    Finding Van der Waals Distances for C-C Spatial Interactions

    Hi, I am looking for table or something that gives a tumb of rule for van der Waals distances - I have some C C spatial interactions which I would like to determine if their interaction contributes to the total energy or should I calculate it with a Lennard-Jones potential to get an...
  3. L

    Trying to Understand Attractive Interactions

    Before someone accuses me of being a half-wit attemtping to explore fields way beyond my intelligence, I'll just come straight out right now and say: "My highest level of education is that of a high school graduate"! I am however, on a very serious trip to learn as much as I can about the...
  4. D

    Can Particle Interactions Reveal the Presence of Strong Interactions?

    Whenever a process yields a photon, an electromagnetic interaction is involved. If a neutrino comes out, a weak interaction is responsible. Is there any way to see from the ingoing and outgoing particles if a strong interaction is involved?
  5. C

    Magnetic Interactions in a Wire-Magnet System

    Homework Statement A magnet is hung by a string and then placed near a wire as shown. When the switch is closed, the magnet rotates such that the ends of the magnet move as indicated by the arrows. At the instant the switch is closed determine: a) the direction of the current through the wire...
  6. S

    Physical Interactions over Great Distances

    Say you (somehow) constructed a very long, sturdy rod, about a light year in length. Say it was made of unobtanium, so it has the same mass as a relatively short steel rod. Now say there are two astronauts, one at each end, and one of the astronauts gives the rod a firm push in the direction...
  7. S

    Better potential than Lennard-Jones for Carbon Carbon interactions?

    Hello! I was wondering if anyone could provide me with any advice on a better interatomic potential than the Lennard-Jones (Mie 6-12) potential for carbon-carbon interactions. I know that L-J fails for metals, but I am not sure how good it would be for carbon-carbon interactions. Are there any...
  8. J

    Theory of interactions, theory of collisions?

    Can QFT be used to anything else but particle collisions? Particle collisions seem to be the major application of the theory, but it hasn't become clear to me if it works for anything else.
  9. M

    Are so-called non-local interactions really non-local?

    There is something I do not quite understand with regards to the so-called non-locality problem in EPR like experiments. The wave function propagates at c, so even when two particles, that are part of the same quantum system, move in opposite directions they are still connected. They both...
  10. Z

    Exploring Tidal Forces - Learn about their Effects and Interactions

    Hi, I'm not sure if I'm at the right place to write this message, so please excuse me if I'm not. I have read a bit about tidal forces, but I still don’t understand what they are, how they act on different body masses, etc. So, I thought I could find answers here. I would greatly appreciate it...
  11. L

    SR transforms of matter/light interactions

    Hello I'm trying to picture various light based experiments as described from a frame that is in motion with respect to the experiment devices. For instance the reflection of a photon in a light clock: the atoms (and their fields) that constitute the surface of the mirror are squashed. How...
  12. siddharth

    How Does a Portable Device for Pressurizing Tires Impact Thermodynamics?

    The question verbatim is: "A portable device for pressurising tyres consists of a small container of 1.5 cft volume, initially filled with, say, CH4 at 500 psia. When a tyre (volume=0.5 cft) is to be filled, the gas is allowed to flow into it from the container through a valve till the pressure...
  13. S

    Interactions between quarks and neutrinos

    I am wondering how to calculate how far a neutrino would have to pass through a substance for it to have a probability P of interacting at least once. Water, for instance, has a density of 1 g / cm^3; using Avogadro's number I think this means that there is about 6.02 x 10^29 protons and/or...
  14. E

    Matter - Antimatter interactions

    Just curious. I know that antiproton will annihilate with a proton, but is that the only baryon which will react with a proton in such a way. Specifically, do the specific constituent quarks annihilate with their antimatter counterpart or do they only annihilate in the proper 2 and 3 quark...
  15. S

    Explaining EM, Weak & Strong Interactions in 4D Spacetime

    Hi, this may seem like a ridiculous qn.but,we can explain gravity on the basis of the curvature of 4D spacetime.can we explain the EM,weak and strong interactions similarly on the basis of dimensions?
  16. E

    Photon - Matter Interactions

    First time visitor to this cool little forum we have here. So I'm trying to figure out how to determine the cross-section of Compton Scattering and Pair Production when a high energy photon interacting with the Coulomb field of an atomic nucleus. I see a lot of pretty charts and/or values...
  17. P

    Explaining Gravity Through Exchange Interactions

    Can gravity be explained by exchange interactions? I am supposed to give a presentation on it, so some explanation as to why or why not would also be very much appreciated. Thanks very much in advance.
  18. Q

    Are there Rules for Quark Interactions and Particle Formation?

    example: 2 protons collide and a down-antidown quark pair is created, giving a pi-plus meson, a neutron and a proton. with all those quarks knocking around, are there specific rules saying which particles are formed from them? like, what stops there being a pi-zero meson and 2 protons? or any...
  19. P

    Exploring Light: Photon-Atom Interactions

    Ok, i have recently been trying to learn a lot about light, and I have found that the reason the speed of light is slower in dense materials is because of the photon-atom interactions. However, I have also been taught that when a photon is absorbed by an atom that an electron in that atom...
  20. F

    Strange way of visualising particle interactions

    http://home.hetnet.nl/~inthepicture/quarks/" I personally find this a brilliant way to visualise particles, but don't think there's any "truth" in the symbols, any more than there's "truth" that antiparticles in Feynman diagrams are really particles that time travel.
  21. L

    1 to 2 Interactions, or explosions

    1 to 2 Interactions, or "explosions" I'm stuck doing this problem on my physics homework.. it's different than the type of problems we have been doing in class, and he hasn't taught us the equation to solve this question. The problem is: Tim, mass 50.00 kg, is riding a skateboard, mass 2.00...
  22. quantumdude

    Interactions of Photons with Matter

    Author: Dr. Donald Luttermoser of East Tennessee State University
  23. E

    Neuclear Interactions: Exploring Forces & Speeds

    What holds the neucleus together? What is the interplay betyween strong , weak and electromagnetic forces in holding the neucleus together? how do these forces fit in with the liquid drop model od the neucleus? What is the expeted speeds of neutrons and protons within the neucleus? what are the...
  24. L

    Calculating Spring Constants and Predicting Speeds in Colliding Carts

    Cart A and B are equal mass ( 500 kg each) and have frictionless wheels. Cart A has a spring attached to its end with a constant 2000 N/m. Cart B has a spring constant attached to its end with a different spring constant. They both sit on a track with their spring facing each other, and are...
  25. wolram

    Ghostly Interactions: Real World Effects?

    Please excuse an ignorant question, but does this ghostly zero point energy have any effect on real world particles?
  26. M

    Photon Interactions: 4 Cases & Conditions

    I read that photons can interact with electrons, atoms or simply disintegrate. The four cases I came across are. 1. Compton scattering. 2. Photoelectric effect 3. Knock an electron to a higher energy state in an atom. 4. electron-positron pair production. While I understand each...
  27. L

    Help with radiactive decay and radiation interactions hw

    i need help with my nuc engineering homework due tomorrow. here is the link for hw1 in the course schedule. http://www.nuc.berkeley.edu/courses/classes/NE39/index.htm if anyone can help me with problems 2 and 3, email me at lml841@juno.com asap! thanks alot!
  28. B

    Protein to Protein Interactions

    How do protein to protein interactions and/or protein-nucleic acid interactions underlie the cellular processes of Replication, transcription, and metabloism. Well i know that protein -protein reactions underlie all processes in the cell. For example i think in translation the ribosome is...
  29. M

    Interactions with the mobile phase

    from my book it says: The chemical interactions of the mobile phase and sample, with the column, determine the degree of migration and separation of components contained in the sample. For example, those samples which have stronger interactions with the mobile phase than with the stationary...
  30. D

    Understanding Quark Colours and Particle Interactions

    Hello, trying to get my head around the (MANY) particles I'm learning about at the moment. First question is about quark colours. I understand the different types of quark (up , down, strange, charmed, bottom and top) but I don't understand how the colours work, why is it necesary for the...
  31. Andrew Mason

    Neutrinos and neutrino interactions

    I have two questions about neutrinos that I haven't been able to figure out: 1. The evidence seems to indicate that neutrinos have rest mass. Since it is invisible to charge and electromagnetic fields and, apparently, gluon fields, how does it interact with matter at all? I think it may have...
  32. B

    Instanious interactions the intermedaite

    Instanious interactions and the intermedaite Hi all, I had some question evolving the atomic interactions of subsition reactions. For example OH- + CH3CH2Cl= CH3CH2OH + Cl- The intermedaite in this reaction is OHCH3CHCL The Cl is leaving at the exact same moment that the OH- is bing to...
  33. N

    Photon-proton/ proton-electron interactions

    hi i was just curious to find out how photons interact with protons (virtual and real) because as we know a photon excites an electron to a new state but what happens to a proton? also why don't electrons collide with the nucleus. i know they have acceleration which will keep them from...
  34. Mk

    String Interactions: Effects on Matter & More

    There are two types of strings, closed and open, and they interact and stuff. How do these interactions affect matter or anything else?
  35. K

    Perturbation Theory: Finite Sums & Physics Applications

    Perturbation theory provides good answers as long as the contributions get smaller and smaller as we go to higher and higher orders. Then we only need to compute the first few diagrams to get accurate results. Is it possible for a perturbation series to get bigger then smaller then bigger-it...
  36. I

    Exploring Sound and Light Interactions with Air Molecules

    Hello, I am researching sound at Concordia University, Quebec. Recently, my mind was wondering and I thought about sound being produced by the air molecules bumping into each other. I began to wonder what else could do the same thing. Does light have contact with the air molecules in this...
  37. D

    One equation for three interactions->

    In most general sense the Archimedes' law of lever could be written this way: \frac{F_1}{F_2}=\frac{GM_1+kQ_1}{GM_2-kQ_2}=\frac{D_2}{D_1} ------------------------------------------------- F=force Q=charge M=mass D=equi.distance G and k are some proportionales Consequentially...
  38. C

    Higher dimensions, quantum inflations, multiverses, and their interactions.

    I am here to ask what anyone thinks on the concept of things beyond this universe, such as a multiverse, quantum inflations, or higher dimensionality. Thanks.
  39. P

    Spidergrams and particle interactions

    In this post I would like to discuss the "weight-principle". This is a rule-of-thumb principle, related to the power-counting principle of renormalisation, which says that different types of particles are given different "interaction weights" specifically the following: graviton:0...
  40. N

    Gravitons & Photons: How Many Interactions?

    For the purposes of this question, assume there are gravitons and they are the carrier of the gravitational force. I could use one of the other forces and leave out gravitons, but it's easier for me to envision this question using a very low strength force. Q1) -- For gravity to deflect the...
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