What is Moments: Definition and 625 Discussions

Moments (stylized MOMents) is a Filipino celebrity talk show hosted by Gladys Reyes and aired on Net 25. It is a show for mothers and kids that feature the different bonding moments, child-rearing styles and the many facets of motherhood. It airs 7pm every Saturdays with replays on Mondays to Fridays at 10 A.M and Sundays at 11:30 AM / 12:30 PM.

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  1. A

    Cumulants and moments of Dirac Delta distribution

    For my statistical mechanics class I need to find the cumulants of a special distribution of which all moments are constant and equal to a. I followed two different approaches and obtained imcompatible results, something is wrong but I couldn't figure it out. Here's what I did: Since all...
  2. P

    How can the wind speed and plane speed be calculated based on given information?

    First time posting hi guys and thanks for the help before i even start :) here goes, i am on question 4 and I am not the best with this but to be far i am not 100% sure on the question here goes An aircraft flies throught still air at a velocity of 100ms-1 due East. However due to a wind...
  3. B

    Magnetic Moments of Hydrogen Atom in 2T Magnetic Field

    Homework Statement Consider the Hydrogren atom in a magnetic field of 2T. If the atom is in the ground state (orbital angular momentum L=0) a) Write down the magnetic moments of the proton and the spinning electron b) What is the splitting of the energy of the ground state in eV due to the...
  4. S

    How Can I Find Moments for My Homework?

    Homework Statement See attached file Homework Equations M_A = Fd The Attempt at a Solution I using the above equation..just summing all of the forces and their directions but I keep getting the wrong answer(distances from the moment). I also tried summing all the forces from...
  5. K

    Is the Sum of All Moments Zero at Any Point if Zero at Point A in 2-D Mechanics?

    If the sum of all moments about a point A of a body is 0, will it then be 0 anywhere else on the body? (I'm working in 2-D)
  6. B

    Applying Turning Moments in Everyday Life: Examples & Tips

    1. How can turning moments be applied in everyday life? It may be advantageous to give worked examples in each case. 2. Can I use wheels & wrenches as examples? Can you please give me more examples? 3. I really don't know what examples I could work from the wheels and wrenches.
  7. Ivan Seeking

    The Best Contraptions, and other Rube Goldberg moments

    Personal experience, hearsay, unsupported rumors, famous examples, what are the best examples of "making do" with inferior, or an eclectic and seeming useless selection of parts to successfully solve a real problem? http://en.wikipedia.org/wiki/Rube_Goldberg_machine Probably one of the best...
  8. O

    Moments of Inertia-Big Confusion

    Moments of Inertia--Big Confusion Hey, 1. Using the conventional method to calculate moments of inertia of rigid objects which says we should divide the object into small pieces each of mass dm and then calculate the integral. is it an exact calculation or an approxximation? so far my...
  9. B

    Turning Moments: How to Apply to Everyday Life | Examples

    Can anyone give me ideas/hints on how I should go about this?
  10. M

    What is the relationship between the moment of inertia and the length of a rod?

    The moment of inertia about an axis along the length of a rod is zero, correct?
  11. B

    Calculating Moment of Inertia of a Sphere

    Hi, I'm in the middle of programming an inertia system and am only really just starting to appreciate what the heck inertia is :) I have been taught inertia, but I haven't actually applied it in a real situation (all my exams and tutorials have resulted in formulae giving answers like...
  12. C

    Mastering Moments | Cathy's Question Answered

    Please could someone tell me how to work out the attached moments question as I've really no idea how to do this one. I'd be really grateful for any help. Thank you. Cathy
  13. R

    Forces, Moments and couple question, Can you please check its right

    Please find the attachment below. Thanks
  14. N

    Question on moments along an axis HW problem

    Well...I am able to work the problem just fine on the x' and y' axes using the standard vector analysis of r X F, I just have no idea how to transfer it to the x and y axes. I provided a picture of the actual problem, alongside the actual answer in the solutions manual. I don't understand...
  15. E

    Moments Question: Plotting Distance Moved vs Resultant of A

    Ok I have this question where there is a beam 12m long, there is a pivot 3m along the beam (A) and another 10m along the beam (B). There is an elephant at the left end of the beam that weighs 10,000N and the weight of the beam is 4000N, I need to plot a graph of the distance moved (m) against...
  16. S

    How Do Dipole Moments Affect Molecular Energy in Electric Fields?

    It can be shown that if a hamiltonian is invariant under space inversion and if an eigenstate is non-degenerate, then the state is either even or odd in each position coordinate. So if there is a perturbation given by a uniform electric field, which has: H_1 = - \vec E \cdot \left( \sum_i q_i...
  17. N

    Understanding Moments: The Mysteries of Force and Distance Unraveled

    When trying to understand moments...two particular things bother me. First Question First...if the unit for moment is defined as a force x distance, a Newton-Meter perhaps, what the hell does that mean? A Newton is very self explanatory...the amount of force needed to accelerate a...
  18. J

    How to Calculate the Force Needed to Move a Roller Over an Obstacle?

    A roller whose diameter is 1.0m weighs 360N. What horizontal force is necessary to pull the roller over a brick 0.1m high, when the force is applied (a) at the center, (b) at the top of the roller. I need a diagram showing the forces acting at the point of contact between the roller and the...
  19. H

    Family Guy: Osama Bin Laden's Funniest Moments

    Funniest video! http://www.metacafe.com/watch/129909/family_guy_osama_bin_laden/
  20. P

    Spin and orbital magnetic moments?

    The books said that total magnetic moment of an electron is spin + orbital magnetic moment. But is the orbital magnetic moment realistic quantum mechanically? I thought electrons dosen't have a trajectory. The Stern Garlach experiment showed that silver atoms only split into two paths after...
  21. 3

    When was your last WOW moment in mathematics?

    How often do you have them? You know those moments when you have been blindly banging your head against that wall when all of a sudden the wall disappears and you have a moment of satisfying clarity. Understanding ( or at least the illusion or temporary understanding ). What was you latest...
  22. C

    Solving Principle of Moments: F1 & F2

    Hello, This is probably really simple but i don't know if this is the right way to work out the answer i have attached an image containing the problem. I know how to get F2 : Taking moments about A: F2 Cos 60 = 1500 F2 = 3000N But then it says to find F1 using the principle of...
  23. L

    Challenging QM problem on coupling two 2-level systems with dipole moments

    Hey! My teacher gave me a very challenging problem on QM. I've only had one introductiary course, but he said he wanted me to figure this problem out by using whatever resources, so now I turn to you guys ;-). The problem is the following: London attraction forces can be thought of as...
  24. M

    Canard Configuration and Sum of Moments

    I'm in an aerodynamics class, and I have this canard configuration I'm trying to figure out for a final exam. I need to find the sum of the moment about the center of gravity. I may cannot be helped without the drawing being posted. So far this is what i have: Mcg = Mac - (lcg + lw)Lw +...
  25. M

    Constrained motion question (using moments of inertia/energy)

    I've attached a screenshot of the question. This is what I've tried so far: I've calculated the initial energy of the system (which is all potential energy): Energy of disc: 0.5*I*w^2 + 0.5 *m*v^2 + m*g*h = 0 + 0 + 0 Energy of arm: 0.5*m*v^2 + m*g*h = 0 + 4*9.81*1.5Cos(45) = 41.62...
  26. M

    Moments and free body diagrams help

    Hello all, Since I have run into the problem of regularly leaving moments out of my free body diagrams (and vice versa), I thought I'd pose a question on the topic. In trying to wrap my head around the concept, I've gone back to the beginning of the semester's notes and that didn't really...
  27. V

    How do I resolve the moments into vectors and forces?

    Hi everyone. I have this problem and I don't even know how to start it! If you are familiar with my previous posts, you know that I usually have most of a problem completed before posting here with my difficulties, however, I cannot even start this one! I don't think there is enough...
  28. G

    Moments: Problem with question itself

    This question is bugging me and though from my point of view it doesn't make sense I'm hoping that someone else can see my thinking and tell me whether they agree with it or not (because this is about the fourth question I've had to say that I can't solve this because the book is talking BS)...
  29. O

    Derivation of the principle of moments

    Derivation of the principle of moments... i know the principle of moments might seem very obvious at the beginnning... but really, how was it derived or proposed? and by what proof?
  30. A

    What Determines the Signs of Magnetic Moments in a Hydrogen Atom?

    Blard: Consider the hydrogen atom in a magnetic field of 2T. If the atom is its ground state. (a) Write down the magnetic moments of the proton and the spinning electron. A: For electron Uz = +/- 0.5gUb = - 9.27E-27 J/T Since it's the ground state g is 2 (approx) My question is what...
  31. T

    Moments of Inertia: Finding Center Point of Semicircle

    can anyone tell me how to find moments of inertia for the centre point of a semicircle??
  32. T

    Calculating Law of Levers Moments

    When you calculate the two moments for the law of the levers, they are supposed to be the same, right?
  33. W

    Moments: rotational and translational velocity

    Hello everyone, I'm working on a basic spaceflight simulator during the break, and I've been unable to come up with some info I need to do the physics. Suppose you have a simple object... say, a beam of dimensions w, h, and d. Then suppose (for example) you apply a constant force at the...
  34. K

    Inertia moments (i don't know)

    once again I have succeeded in confusing myself about basic angular motion...:confused: If I have a pulley of with an unkown moment of inertia, and a bucket hanging from the pulley with a known mass, height, and acceleration in which it falls. Why can't i use: Torque = Ia rf = Ia r * mg...
  35. A

    Deriving Common Moments of Inertia: Sphere I=\frac{2}{5}mr^{2}

    Could someone direct me to a site that explains how the common moments of inertia were arrived at? My physics professor put up on the board today that for a uniform sphere: I=\frac{2}{5}mr^{2}. He said it was just the anti-derivative of something, but he didn't want to go into it because...
  36. J

    Calculating Meter Stick Weight Using Method of Moments

    Part of my lab involves using the method of moments to calculate the weight of a meter stick. We attached two weights to different ends of the meter stick and are expected to calculate the weight of the meter stick based on the positions of the weights. I have no clue what the moment of methods...
  37. N

    Using primitives to integrate moments of Inertia

    using "primitives" to integrate moments of Inertia My classmates are lost and I just can't think the way my proffessor does when approaching these problems. He gave us about 50 shapes to find moments of inertia for this weekend and I'm not having any trouble doing them... my way. I can use a...
  38. G

    Method of Moments Estimation for Rectangular Distribution

    ok, X_1,X_2,...,X_n are independant(and unbiased) rectangular distributed random variables over the interval [0,a] It is known that T(X)=max(X_1,X_2,...,X_n) is sufficient. i am supposed to find the moment estimator for a using the method of moments. i know I'm supposed to equate the first...
  39. C

    Discover My Moments | Explore Your Memories with Check My Moments

    Check my Moments... Edit: Deleting post because I think quite a bit of my work was incorrect--will repost tomorrow, corrected, hopefully...
  40. U

    What are the tensions in BC and BD?

    mass of e is 100 kg mass of bar is 20 kg and acts at midpoint sume of moments about point a due to weight of bar and forces on b by bc, bd, and be, are 0, determine tensions in bc and bd so i continued like this. The moment about point A from all those forces is 0. 0 = (Raf x Wab) + (Rab...
  41. M

    Question on moments of inertia

    I have a mechanics question that I can't seem to figure out. I've spent quite a bit of time on it but don't have much of an answer. If anyone can help I would appreciate it. Round objects are rolling without slipping down an inclined plane of height H above the horizontal. The box is...
  42. V

    Adding X as an Instrument Variable in GMM Estimation

    Hello, I have a question concerning the GMM equation specification. Say we partition each day in 7 intraday intervals. We want to estimate the 7 intraday interval moments for a variable Y observed in those 7 intervals over a period of T days meaning we have t = T*7 total observations for...
  43. J

    Adding/subtracting moments of inertia

    Hi i was wondering, if the sphere is divided into 5 spherical shells, each shell has a different density and each shell is of equal thickness My question is: Can I calculate the moments of inertia for each shell by subtracting the moment of inertia of the sphere inside it, from the entire...
  44. M

    Calculating Upward Contact Forces of Uniform Ladder

    I found the following question in a textbook: Two men are carrying a uniform ladder of length 12m and weight 250N. One man holds the ladder 2.0m from the front end and the other man is 1.0m from the back of the ladder. Calculate the upward contact forces that each man exerts on the...
  45. O

    Help with Moments Question Part II

    Hi can someone please do part ii) of this moments question. Just can't get my head round it. Thnx! http://img150.echo.cx/img150/872/physicspaper0128xk.jpg http://img150.echo.cx/img150/1093/p...paper0130ot.jpg
  46. JamesU

    Dealing with Annoying Friends: Navigating Conflicts and Finding Happiness

    I have a "friend" who is the most annoying thing on the planet. He's jewish and is about to have his bar mitzvah, so he's taking hebrew classes. He's always trying to show off his hebrew reading abilities and I can't get him to shut up! Today we had an argument(after MIH's thread) about...
  47. B

    Monopole and Dipole moments

    I'm having a lot of difficulty calculating the monopole and dipole moments for a dielectric sphere with surface charge of the form, sigma(theta)=sigma(0)cos(theta) If surface charge wasn't present and it was just a point charge I would be OK but I need a few pointers on how to do it with...
  48. I

    Equilibrium of a Uniform Rod with Attached Particle Question

    I'm stuck! This is the question: A uniform rod AB has length 3m and weight 120N. The rod rests in equilibrium in a horizontal position, smoothly supported at points C and D, where AC=0.5m and AD=2m. A particle of weight W Newtons is attached tto the rod at a point E where AE=x metres. The rod...
  49. S

    Method of Moments: Solving For Theta

    maybe I'm missing some stupid algebraic mistake..but given theta/theta + 1 = y. how does this imply that the method of moment is theta = y/ 1-y??
  50. J

    Taking Moments About a Point and Resolving Forces

    Hi, I have my first year university exam coming up soon and this type of question seems to feature quite prominently in the past paper questions we are given where I have to take moments about a point and also resolve forces horizontally and vertically. I suppose the best way to show you would...
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