What is Demonstration: Definition and 123 Discussions

A demonstration is an action by a mass group or collection of groups of people in favor of a political or other cause or people partaking in a protest against a cause of concern; it often consists of walking in a mass march formation and either beginning with or meeting at a designated endpoint, or rally, to hear speakers. It is different from mass meeting.
Actions such as blockades and sit-ins may also be referred to as demonstrations. Demonstrations can be nonviolent or violent (usually referred to by participants as "militant"), or can begin as nonviolent and turn violent depending on the circumstances. Sometimes riot police or other forms of law enforcement become involved. In some cases this may be in order to try to prevent the protest from taking place at all. In other cases, it may be to prevent clashes between rival groups, or to prevent a demonstration from spreading and turning into a riot.
The term has been in use since the mid-19th century, as was the term "monster meeting", which was coined initially with reference to the huge assemblies of protesters inspired by Daniel O'Connell (1775–1847) in Ireland. Demonstrations are a form of activism, usually taking the form of a public gathering of people in a rally or walking in a march. Thus, the opinion is demonstrated to be significant by gathering in a crowd associated with that opinion.
Demonstrations can promote a viewpoint (either positive or negative) regarding a public issue, especially relating to a perceived grievance or social injustice. A demonstration is usually considered more successful if more people participate. Research shows that anti-government demonstrations occur more frequently in affluent countries than in poor ones.
Historian Eric Hobsbawm wrote of demonstrations: Next to sex, the activity combining bodily experience and intense emotion to the highest degree is the participation in a mass demonstration at a time of great public exaltation. Unlike sex, which is essentially individual, it is by its nature collective… like sex it implies some physical action—marching, chanting slogans, singing—through which the merger of the individual in the mass, which is the essence of the collective experience, finds expression.

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  1. fluidistic

    Demonstration that the electric potential is continuous over a surface

    Homework Statement I'm asked to demonstrate that the electric potential is continuous over a surface with a charge density ##\sigma##. Homework Equations ##\Phi (\vec x )= \int _ S \frac{\sigma (\vec x' )}{|\vec x - \vec x '|}da'## The Attempt at a Solution I'm not sure what I must...
  2. M

    Equivalence relation demonstration - confirmation needed, please.

    Homework Statement 'Show that row equivalence is an equivalence relation'. Homework Equations The definition for 'row equivalence' given in the text is, 'two augmented matrices corresponding to linear systems that actually have solutions, are said to be (row) equivalent if they have the...
  3. F

    Demonstration of the jeans equation

    Hello, I have two problems on an article about the demonstration of the jeans equation. I have 2 problems : 1*) Firstly, I begin with the collisionless Boltzmann equation : \dfrac{\partial\,f}{\partial t}+{\bf v}\,\cdot\,\nabla\,f-\nabla\,\Phi\,\cdot\,\dfrac{\partial\,f}{\partial {\bf...
  4. E

    Wanted: giant demonstration slide rule

    I'm in the market for a large slide rule for my collection. If you know of an available one please let me know. http://albany.craigslist.org/wan/3460782750.html
  5. R

    A demonstration on the necessary positive change in the entropy

    Homework Statement Hello everyone. My problem is as follows: In a spontaneous process where two bodies at different temperatures T_{1} and T_{2}, where T_{1}>T_{2}, are put together until they reach thermal equilibrium. The number of atoms or molecules of the first is N_{1} and N_{2} for the...
  6. J

    Need a demonstration of constant motion and balanced forces

    I'm a high school physics teacher and I need a way to demonstrate net force = zero when something is moving at a constant speed. Usually some get it right away, some don't care and a few just really can't get their mind around it. I tell them about the parachutist, their car going 60 mph in a...
  7. E

    Designing a angular momemtum demonstration

    Homework Statement "Design an angular momentum demonstration. Back up your demo with a calculation(s)." I was given two cylinders with adjustable ball bearings inside, and will have access to an incline once in class (the cylinders are designed to roll down it). Homework Equations I...
  8. I

    Why is \sqrt{2}+\sqrt{3} irrational?

    Demonstrate that \sqrt{2}+\sqrt{3} is irrational. Thanks
  9. H

    Looking for Image Compresssion Demonstration Applet

    Hello All, I hope I'm in the correct category, please let me know if I'm not. I'm looking for an applet on the web that I came across a few years ago. It demonstrated the basics of image compression by letting the user select from various transforms (DCT, some form of wavelet, a couple I...
  10. C

    MHB Demonstration Video: Handwriting recognition for maths

    Hi, This will be the last time I bother you with this for a little while. I have produced a rather amateur video (4min) of what I think handwriting recognition for maths should look like. For the time being, I have named it MathPen. http://users.ecs.soton.ac.uk/cmml100/VIDEO0012.mp4 What I...
  11. E

    Demonstration [L_i,x_j]= ε_ijk x_k

    Hi! I have to show that [L_i,x_j]= i \hbar \varepsilon_{ijk} x_k but my result is different, I'm definitely making a mistake :confused: ok I wrote L_i = \varepsilon_{ijk} x_j p_k then [L_i,x_l]= \varepsilon_{ijk} ( [x_j p_k , x_l] ) = \varepsilon_{ijk} ( {x_j [p_k , x_l] + [x_j...
  12. E

    Variational expression: a demonstration

    Homework Statement Hello! My problem is with a variational expression. I have a quantity, say L, which could be determined by the ratio: K = \displaystyle \frac{\left[\int_a^b E(x)e_n(x)dx\right]^2}{\left[\int_a^b E(x)e_1(x)dx\right]^2} Where e_1(x), e_n(x) are known functions and n...
  13. bohm2

    Loophole-free demonstration of nonlocality?

    Is anyone familiar with Suarez's papers in this area? I've posted his most recent and pertinent papers on the topic below and even though I read them all, I'm still having trouble understanding his arguments: Single-photon space-like antibunching http://lanl.arxiv.org/pdf/1204.1712.pdf The...
  14. J

    Limit demonstration of sequence

    Hi guys I know this limit goes to infinity lim (3^n-n) But how do I demonstrate it? Actually I know also that this type of limits goes to infinity lim \frac{a^n}{n^k},\forall a,k \in \mathbb{N},a>1 But I don't know how to prove it May you kindly help me? Many thanks
  15. A

    Calculus, Analytical demonstration

    Homework Statement Demonstrate Analytically: If \lim_{x\to a}f(x)=L and L<0, there exists a δ>0 so that x\inDom(f), 0<|x-a|<δ \Rightarrow f(x)<0 2. The attempt at a solution I start identifying what I want to demonstrate and what are my assumptions. x\inDom(f), 0<|x-a|<δ \Rightarrow f(x)<0 I'm...
  16. Telemachus

    Understanding the Properties of Tensor Products: A Demonstration

    I have to demonstrate that if A^{rs} is an antisymmetric tensor, and B_{rs} is a symmetric tensor, then the product: A^{rs}B_{rs}=0 So I called the product: C^{rs}_{rs}=A^{rs}B_{rs}=-A^{sr}B_{sr}=-C^{rs}_{rs} In the las stem I've changed the indexes, because it doesn't matters which is which...
  17. Q_Goest

    Impressive harmonic motion demonstration

    The YouTube video here will get you to think a bit. Basically, 15 separate pendulums that create various patterns: I wonder though if you could say how many given patterns are created. Not sure how to describe that... what do you think?
  18. V

    Demonstration of Dirac equation covariance

    Demonstrations of Dirac equation covariance state: The Dirac equation is (i γ^{μ} ∂_{μ} - m)ψ(x) = 0. \ \ \ \ \ \ \ \ \ \ [1] If coordinates change in a way that x \rightarrow x' = Lx, \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ [2] where L is a Lorentz transformation, [1] should...
  19. S

    Need a demonstration of interference in Waves

    Hey, I am having a project in Physics, and the project is about interference in Waves. We got a task, and I need to demonstrate how waves interfere with each other. I got a demonstration with Lasers, how they split up, but I also need a much more simple demonstration. Something like when...
  20. dkotschessaa

    Demonstration the idea of a Euclidian proof

    I'm going to give a presentation involving mathematical proofs to people who are not really into math (in a Critical Thinking class). I would like to use something from Euclid's elements. I would like it to be a geometric proof - but what is the most "audience friendly?" I need to be able...
  21. W

    Amazing Quantum Levitation Demonstration Video

    I found this great demonstration video of quantum levitation and just had to share it. http://www.youtube.com/watch?feature=player_embedded&v=Ws6AAhTw7RA
  22. N

    Demonstration with completes sets

    1. We have A\subseteq \mathcal{U}. For i_1, i_2 \in \{0,1\}and A^0 := A^c, A^1 := A. A is a complete set if A\cap A_1 ^{i1} \cap A_2^{i2} \neq \emptyset then A_1 ^{i1} \cap A_2^{i2} \subseteq A Demonstrate that A_1, A_2 are complete sets too. And if A is a complete set then A^c is a complete...
  23. P

    What happens when you drop magnets in aluminum and glass tubes simultaneously?

    Dropping a strong magnet in an aluminum tube is cool, but what will happen if magnets are dropped at the same time in tubes of aluminum and glass that are adjacent? Or at a defined distance due to strength of the magnets? Somebody probably has thought of this and demonstrated the results. It...
  24. F

    Demonstration analysis and good books?

    When I try to demonstrate that lim (x^2)=4 x--->2 I found a different delta (delta=min{2-sqrt(epsilon-4),sqrt(epsilon+4)-2}, towards the one that is written in Demidovich´s book (delta=epsilon/5). Could someone help me? Could someone tell...
  25. G

    Friedmann Equation demonstration - Liddle

    Are you confortable with the demonstration in page 19 of Introduction to Modern Cosmology - A. Liddle ? My problem is in particular eq. (3.4) when he writes the potential energy of a test particle. I think there is a factor of 2 missing in the denominator.
  26. B

    Rewriting the derivative of a homogenous function demonstration

    Homework Statement Suppose that f=f(x1,x2,...,xn) is a homogeneous function of degree r with mixed partial derivative of all orders. Show that Can this be generalized? Homework Equations We say that a function f is homogeneous of degree r if there exists r such that f(tx1,tx2,...,txn) = tr...
  27. J

    Is this demonstration of the book from Ernst Mach correct?

    ¿Is this demonstration of the book from Ernst Mach correct? I am reading the book "The science of mechanics", Ernst mach. He is talking about the achievements of Christian huygens, and he wants to calculate the centripetal acceleration of a circular motion. As you can see in the image...
  28. Telemachus

    What is the Explanation for the Zero Value in the Steiner Theorem Demonstration?

    Homework Statement I have a doubt about the steiner theorem demonstration, its actually trivial, but I can't realize why is this. Lets see, the demonstration which you can see http://en.wikipedia.org/wiki/Parallel_axis_theorem" goes as follows: I_{cm} = \int{(x^2 + y^2)} dm I_z = \int{((x -...
  29. N

    Youtube maglev toy train demonstration

    Interesting four minute video with a magnetic levitation superconductor train http://www.youtube.com/watch?v=5el1A5B-h3Q&feature=player_embedded Perhaps a good demonstration for teachers
  30. A

    Uncertainty relation demonstration

    HI, I will not used the template provided since this is not a textbook problem. It's a problem I have with a demonstration in Quantum Mechanics Vol 1, Cohen-Tannoudji " Complement C III [Q,P] = i \hbar Consider the ket: |\phi \rangle = (Q +i\lambda P)|\psi \rangle where \lambda is an...
  31. A

    Fluid Mechanics: Bernoullis Theorem Demonstration?

    Having trouble using the bernoulli equation to work out the dynamic head for this experiment. the equation I am using is as follows: P1/ρg+(v1^2)/2g+z1=P2/ρg+(v2^2)/2g+z2 Where: P= static pressure v = fluid velocity z = vertical elevation of fluid so z1 = z2 for horizontal tube...
  32. Telemachus

    Demonstration of the differentiability of a continuous function

    Homework Statement I have some doubts about the demonstration of the differentiability. If I'm asked to proof that an average function is differentiable on all of it domain, let's suppose its a continuous function on all of its domain, but it has not continuous partial derivatives. How should I...
  33. S

    A demonstration of inductive reactance

    I'm conducting a seminar at college on application of AC to passive components. To Demonstrate what inductive reactance is , i want to wind a coil , connect it to a DC source , find the resistance. Then i want to directly connect it the AC mains and find th effective resistance again and show...
  34. E

    Oscillations - A puzzling demonstration

    I watched MIT OCW PHYSICS 8.01 lectures, and in lecture no.13, i saw a puzzling demonstration. Link :http://ocw.mit.edu/OcwWeb/Physics/8-01Physics-IFall1999/VideoLectures/detail/embed13.htm" I don't understand, what can be the reason for the oscillations of ball on the track with the...
  35. C

    Ideas for making a Physics Demonstration?

    For my lab class we have to make some sort of physics demonstration in our machine shop with a budget of ~$600-$1000. I was wondering if anyone on here had some suggestions as to some cool/fun things to make? Things along the lines of Van De Graaf generators, inverted pendulums, etc. can be...
  36. T

    Understanding the Physics Behind Moving a Car with a Rope and a Pole

    Homework Statement You attach a strong rope or steel cable to a light pole and a car parked on a downhill incline. If you have a student lift, pull, or push perpendicularly on the rope in the center it will be easier to move the car than if you were to push it. Why? Prove this...
  37. F

    Monkey Hunter demonstration in GR

    I'm not sure if this has been discussed before. We all know about the Monkey Hunter Demonstration. Assuming a uniform gravitational field, a projectile shot directly at a target will strike the target as long as the target has zero velocity at t=0 and both the projectile and target begin...
  38. T

    Curl of the transpose of a gradient of a vector: demonstration of an identity

    I would like to demonstrate an identity with the INDICIAL NOTATION. I have attached my attempt. Please let me know where I made mistakes. Any suggestion? I am trying to understand tensors all by myself because they are the keys in continuum mechanics Thanks
  39. N

    Introductory demonstration materials

    Hello all, While searching for a holiday gift for a younger sibling (who is rapidly becoming interested in the sciences), I remembered a demonstration from a high school physics course that sparked my own interest in physics. It involved a unique object - a light bulb with a needle and 4 black...
  40. F

    Can CO2 Increase Temperature in a Sealed Environment?

    I was pondering a posible global warming demonstration. Two identical clear cubes with thermometers in the center. they have some 1 way valve at the top. Put dry ice in one. The one containing the dry ice is initally cooler, but as all of the dry ice evaporates, the cube fills up with CO2...
  41. C

    Explanation wanted for a demonstration in MIT phyiscs lec #6

    The demonstration: A mass of 2kg is hanged to a string that is hanged vertically from a fixture. Another string is attached to the bottom of the mass and then this bottom string is given a downward pull. Note that the strings used are assumed identical. This demonstration can be found here...
  42. F

    Demonstration, measuring time with a stick

    Tueseday, I go to Auburn to interview for an open position in Alabama Science in Motion. http://www.auburn.edu/academic/science_math/cosam/announcements/ Basically, I would be traveling around high schools, moving equipment, doing demonstrations, and developing new labs. I need to come...
  43. J

    PHP PHP -OO or Functional for speed/ knowledge demonstration?

    My second PHP question this week...:smile: I'm writing a PHP app which includes things such as form validation and database interaction. So far, almost everything has been written procedurally. However, I started playing around with PHP's OO stuff, and it's cool. Problem is, this app is being...
  44. S

    Hand-on semiconductor demonstration

    I am a graduate student working in semiconductor physics. I have been asked to give a presentation to high school girls about my field. The problem I am running into is that the organizers would like me to provide something hands-on that the girls can do relating to semiconductors. I have not...
  45. J

    News What is the reason of demonstration in Greece?

    I have heard the demostration in Greece via news of press. but the news from world-wide press are not correspond to common sense. because press make money from advertisement of corperation, they are apt to disguise reality. I think only death of one boy can not provoke such situation...
  46. C

    Help explaining physics demonstration

    In my last class the professor had a bike tire with a string attached to its axle. When the tire was hung from the string it sat parallel to the floor; however, when it was spun and hung from the string it remained perpendicular to the floor and rotated around the string. What was it that kept...
  47. S

    Exploring the Wonders of Wireless Power: A Hands-On Demonstration

    Several years ago, I was at a science/art exhibit in Los Angeles where a box was on a pedestal and it had a couple hundred jellybean sized light bulb-type things in it. They appeared to be just a filament in a glass encasement. When they were just sitting in the box, they were dark, however...
  48. W

    Cool resonant mode demonstration

    Here is a nice demonstration of resonance and vibrational modes.
  49. C

    Practical demonstration of radiation

    Hi, I'm going into a school for a day to help out with a science week and I've been asked to talk about mobile phones and electromagnetic radiation. The age range is 14-16 and its UK GCSE level. I'm trying to get ideas for practicals or interesting demonstrations to give, so far I've...
  50. S

    I need to create a demonstration

    So, I need to create a physics demonstration that highlights a concept of introductory physics out of household items. Does anybody know of any good ones I could use?
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