Weird Definition and 482 Threads

Psychology is the science of mind and behavior. Psychology includes the study of conscious and unconscious phenomena, as well as feelings and thought. It is an academic discipline of immense scope. Psychologists also seek an understanding of the emergent properties of brains, linking the discipline to neuroscience. As a social science, psychologists aim to understand the behavior of individuals and groups.A professional practitioner or researcher involved in the discipline is called a psychologist. Some psychologists can be classified as a social, behavioral, or cognitive scientists. Some psychologists attempt to understand the role of mental functions in individual and social behavior. Others explore the physiological and biological processes that underlie cognitive functions and behaviors.
Psychologists explore behavior and mental processes, including perception, cognition, attention, emotion, intelligence, subjective experiences, motivation, brain functioning, and personality. Psychologists' interests extend to interpersonal relationships, psychological resilience, family resilience, and other areas within social psychology. Psychologists also consider the unconscious mind. Research psychologists employ empirical methods to infer causal and correlational relationships between psychosocial variables. Some, but not all, clinical and counseling psychologists rely on symbolic interpretation.
While psychological knowledge is often applied to the assessment and treatment of mental health problems, it is also directed towards understanding and solving problems in several spheres of human activity. By many accounts, psychology ultimately aims to benefit society. Many psychologists are involved in some kind of therapeutic role, practicing in clinical, counseling, or school settings. Other psychologists conduct scientific research on a wide range of topics related to mental processes and behavior. Typically the latter group of psychologists work in academic settings (e.g., universities, medical schools, hospitals). Another group of psychologists is employed in industrial and organizational settings. Yet others are involved in work on human development, aging, sports, health, forensics, and the media.

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  1. Q

    Why Did a Cumulus Cloud Change Colors When Viewed Through Polarized Sunglasses?

    One day I just put on my polarized sunglasses, and on the road, I looked at cumulonimbus cloud probably in the congestus stage in a system with many other cumulus clouds (those big puffy clouds), and a single giant cumulus cloud appeared yellow-ish when wearing the polarized sunglass, and I took...
  2. S

    Solving a Weird Integral Homework Problem: Tips and Attempted Solutions

    Homework Statement evaluate Homework Equations The Attempt at a Solution i don't think there is an elementary function as anti derivative for this integral i tried taylor expansion, doesn't seem to work. Can anyone give me a hint ?
  3. alemsalem

    What's weird in the Stern-Gerlach experiment?

    The first thing is that it gets discrete spin states. Ok so we filter out a spin up state |+> and then send it through a perpendicular Apparatus then act surprised that we got |-> states back, isn't that what precession does? the only weird thing I can think of is that even after precession we...
  4. wukunlin

    What Causes Holes in the Sky Over Tainan, Taiwan?

    someone took video of this thing over Tainan in Taiwan, is there any known natural explanation to ummm, holes in the sky? [url]_jEBrT-roJU[/youtube]
  5. N

    Does the Limit of aCn/na Approach 1/a! as n Approaches Infinity?

    Here's the weird limit: lim n\rightarrow \infty aCn/na = 1/(a!) Don't ask how I thought this up, but let me explain my reasoning. Let's say that a=3. Then aCn = (n)(n-1)(n-2) And because n is approaching infinity, could it be (n)(n)(n) = n3? I wouldn't normally think of things like this but...
  6. L

    Getting weird formula for Capacitance

    Okay, so I know C=Q/ΔV And ΔV is the sum of the electric fields multiplied by the distance between the charges, so if the first charge has a charge of Q and the other has -Q with R distance between, the electric potential/voltage is: ΔV = [(kQ/r^2) + (kQ/r^2)]R so ΔV = 2kQ/R. And C = Q/ΔV...
  7. 1

    Am I wrong? Is this correct thinking? Am I weird? Am I crazy?

    http://www.teacherschoice.com.au/maths_library/area%20and%20sa/area_2.htm "NOTE: The value of p can never be known exactly, so surface areas of spheres cannot be calculated exactly." p = pi here. It always irks when people say "(insert irrational constant here) doesn't have an exact...
  8. B

    Weird Integer Progression in Language Whose Name I Failed to Catch

    Right now I'm watching a US Public Broadcasting Corporation television program entitled: "The Linguists", in which a man (I think he was from Africa, but I'm not even certain of that, as I wasn't even listening until the math stuff surfaced), explaiined his integer progression, which was quite...
  9. Q

    Would it be weird to show a program I wrote to my professor?

    I'm a second year Comp E student, and in an intro class we're learning 8085 assembler. The professor wrote his own simulator for the class, but it's kinda buggy and I feel like it's been given minimal updates since he wrote it some 15 years ago. I was looking for a programming project, so I...
  10. N

    Comp Sci Weird File Output behavior in java

    Homework Statement I've implemented RSA and just need to print some stats and write to files.Homework Equations My solution works fine when I provide an input file, however, if I let it read from standard input there is no output written to either of my output files. Reading works regardless. I...
  11. C

    Mysterious Picture Change on Android Device

    i'm using an android smartphone it takes really clear pictures and when u zoom in it shows the picture in great detail and clarity and I'm very pleased with this feature. however, recently i took two pictures and when i tried to zoom in while viewing them they suddenly turned into another...
  12. S

    Differential Geometry, easy question, weird hint making me doubt myself

    Homework Statement Homework Equations From my notes: (\psi_{*}v)_{k}(x)=\sum_{i=1}^{n}v_{i}(x)\frac{{{{{\partial}}}}{\psi_{k}(x)}}{{x_{i}}} The Attempt at a Solution Okay so i) is fine (ignoring the typo in the question) but I'm a bit confused about ii) I don't see any need...
  13. J

    Why are the natural frequencies of a clamped-clamped beam smaller than usual?

    Hello, I recently used Matlab to find the natural frequencies of a clamped-clamped beam. It was fairly simple, as I construct the global mass and stiffness matrices. Then it's just a matter of using the eig() function. (For sake of simplicity I put beam properties all to 1.) When I choose how...
  14. R

    Continuity of a weird function defined as a summation including floor

    Homework Statement Show that f(x) = \sum_{i=1}^{\infty}\frac{2^{i}x - \lfloor 2^{i}x \rfloor}{2^{i}} is continuous at all real numbers, excluding integers. The Attempt at a Solution I've tried going about via |f(x) - f(y)| < ε, but am having trouble with this, since first, I don't get anywhere...
  15. PeterDonis

    Derivation of expansion scalar for FRW spacetime - weird observation

    Derivation of expansion scalar for FRW spacetime -- weird observation In a recent thread... https://www.physicsforums.com/showpost.php?p=3567386&postcount=137 ...I posted a formula for the expansion scalar for the congruence of "comoving" observers in FRW spacetime. When I posted, I...
  16. M

    Weird 2-spring problem with VERY limited data

    Homework Statement Two springs are hung in a "v" shape, and a 500g mass is attached to the point of the v. One spring is observed to stretch 9mm, the other 23mm. Students are NOT permitted to measure any angles, before or after the weight is attached. Is it possible to...
  17. T

    Eigenvalues and ground state eigenfunction of a weird Hamiltonian

    Hello again everyone! I would like to ask a question regarding this Hamiltonian that I encountered. The form is H = Aa^+a + B(a^+ + a). Then there is this question asking for the eigenvalues and ground state wavefunction in the coordinate basis. The only given conditions are, the commutator...
  18. J

    Anything weird happen to you lately?

    Over here: The tutor started writing all over my math book in pen to demonstrate a problem! Why would a tutor do that? Especially to a perfectly clean new unmarked book that you may want to sell.
  19. A

    Weird statement in my book about (measure theoretic) conditional expectation

    My book tries to illustrate the conditional expectation for a random variable X(\omega) on a probability space (\Omega,\mathscr F,P) by asking me to consider the sigma-algebra \mathscr G = \{ \emptyset, \Omega \}, \mathscr G \subset \mathscr F. It then argues that E[X|\mathscr G] = E[X] (I'm...
  20. D

    Wireless Signal Fluctuation. Weird Results.

    Hi there, I'm taking some measurements of a wireless signal using InSSIDer 2.0. Sometimes the signal fluctuation is upwards of 20 dBs, and sometimes the fluctuation is almost nothing. It is a very short range signal. There is minimal fluctuation in the signal shown when I'm 10 metres...
  21. D

    Is there a connection between them?

    I know this may sounds silly but I am confused consider this two form for example, by substitution, I get \omega = dx \wedge dy = d(rCos\theta)\wedge d(rSin\theta) = r dr \wedge d\theta also consider this smooth map F(x,y)=(rCos\theta,rSin\theta) then F^{*}\omega = rdr \wedge...
  22. Q

    Weird ideal gas equation question

    if a gas expands isothermally but irreversibly from V=1litres to V=2litres under constant external 1atm pressure, if i want to know the workdone by the gas, should i be using 1) WD = integral pdV = nRT ln V or 2) WD = pexternal(Vfinal-Vinitial) i realize they give different...
  23. jaumzaum

    A very weird capacitor association

    In the capacitor association a) and b), calculate the equivalent capacitance Given: area = A, vacuum permissivity = E, distance between each plate = d[PLAIN]http://img714.imageshack.us/img714/7073/semttulojznw.jpg In the first I've calculated the capacitance of AB, AC, AD, BE, CE, DE...
  24. A

    Star density calculation = weird result.

    Hello everyone! I'm new here and I've checked this forums once in a while for physics information, mainly astrophysics stuff but I usually found all the answers I needed. Not this time though. A bit about me. I'm an Indie game developer and the game I'm working on takes place in a...
  25. B

    What is the solution to the differential equation dy/dx = [10]x?

    Homework Statement Now that I'm working it out as I'm typing it, I think I may have solved this problem; could still be a mistake though... This was an extra credit problem on the final for my into to diff eq class. I never saw anything like it before and I didn't finish it because I got...
  26. A

    Is Time Really Non-Existent? An Intriguing Question About Measuring Seconds

    So, I would like to start off by saying I know how time works and accept it for what it is, but have a curious question about it. So we all know that 60 seconds make a minute, but how can we tell when exactly a second passed? Let me explain ( this is all hypothetically of course): We...
  27. G

    Chance to help an Electronic Engineer find a weird material for an invention

    Hello. This is my first post here and I come shamelessly looking for help. I'm an Electronic Engineer and have an idea for an invention but do not know if the type of material that is needed exists, the only one I can think of so far is Bread dough. Anyway, what is needed is something...
  28. Femme_physics

    Weird result to a simple derivative question

    I am told to write the value of a the derivative at a certain point next to each function. And to find the point/s f(x) = x2 f ' (x) = -6 so I figured I just do f ' (x) = 2x f ' (-6) = 2 x (-6) = -12 But they tell me the answer is (-3, 9)
  29. E

    Something weird about limit at infinity?

    Homework Statement This is a problem I came up with when I was doing something similar in Spivak's Calculus; although a simpler version. Suppose, we have f(x)=x^3 and g(x)=x^2 find \lim_{x\rightarrow \infty} f(x)/g(x) Homework Equations N/A The Attempt at a Solution...
  30. O

    What is the meaning of the weird symbol in 'Mathematical Logic'?

    What's the symbol in the attached image, that looks like a right pointing arrow, but with a short perpendicular arrow at the base? The book is 'Mathematical Logic' by Cori and Lascar. They don't explain what it is. Maybe it's the symbol for function?
  31. M

    What Does \left[ z^{n} \right] (ln(1-z))^{2} / (1-z)^{m+1} Represent?

    I need help with solving this weird equation... What is: \left[ z^{n} \right] (ln(1-z))^{2} / (1-z)^{m+1}?
  32. H

    Confused About Weird Acceleration Problem in Physics: mA=14kg, mB=11kg, mC=50kg

    http://img849.imageshack.us/img849/9697/physicsy.jpg The system bodies shown in the figure is released from rest. Assuming all the contacts to be smooth, find the acceleration of each block (mA = 14 kg, mB = 11 kg, mC = 50 kg) This problem from Problems In Physics by Abhay K. Singh...
  33. W

    Troubleshooting 555 Timer Output to 2/3 Vcc

    I've got a 555 timer wired up like in this picture and my output is going to 2/3 Vcc instead of Vcc. This is leading to problems as I have hooked into a decade counter down the line which gets the low timer output and it's output shrinks as well. Any ideas on what I should try?
  34. Femme_physics

    What is the explanation for the strange angle result in this trapezoid problem?

    Homework Statement http://img69.imageshack.us/img69/281/trap01.jpg AC and AC both equal 13. The given angles are in the pic. The Attempt at a Solution Attached. Why do I get angle ADC 70? It doesn't make visual sense, and I was told by a very smart person to always trust my visual cues! So...
  35. P

    How Can This Nonlinear Differential Equation Be Solved?

    Hi everybody. Not very good in solving DE's. Here is one for the better: ay'+by = (y'+cy)^2+d where a,b,c and d are real positive constants. I know that : y(0)=0 and y''(0)=k*d (k= real positive constant) Any possible suggestions? Thanks Pachito
  36. J

    Center of Mass and Motion of Objects: A Mechanics Exam Review Question

    Homework Statement I'm doing a review for a Mechanics exam I have tomorrow and this first problem given on the review struck me as odd. Problem Statement: An 89kg boat that is 6.6m in length is initially 7.1 m from the pier. A 27 kg child stands at the end of the boat closest to the pier...
  37. Q

    Understanding Triple Product Rules in Vector Calculus

    triple product is given by A.(B x C) = B. (C x A) = C. (A x B) so why is ∇.(F x G) = [∇ x F].G - F.[∇ x G] ? if i let A = ∇, B = F , C = G, then ∇.(F x G) = - F .( ∇ x G) = G.(∇ x F) its as though they carried the 3rd term over to add to the 2nd term ?
  38. N

    It seems really weird to transfer, question

    It's weird because you have to move from your current college and everything, and the whole thing is weird! Whats your opinion about a typical engineering course load when you transfer from a 2 year college and have finished general ed there totally ? Curious about what to expect, Ok so in your...
  39. P

    Weird: number of moles of NaOH in 20 ml of 1M NaOH

    Hi there, this is a not a homework question but rather question about the theory behind this problem. Say if someone asks you to calculate the number of moles in 20 ml of a 1M NaOH solution, I would usually say it is going to be 20 mmol as you do 20 ml/1000 ml/L x 1M = 0.02 moles = 20 mmol...
  40. E

    Weird Oscillation in wheatstone bridge circuit

    I have this weird oscillation coming from my circuit. its a wheatstone bridge with a single strain gage. I am using The PST 4130 from Omega Engineering to supply +10vdc. When I first turn it on the signal is pretty clean, but after a while, it turns into this...
  41. Hepth

    Mathematica Do the integrals in Mathematica depend on the FeynCalc package and its options?

    How is MM doing the integral? Is this something with a definite solution? Limit[Integrate[(1 - 2 x)/x^2, {x, a, b}], a -> 0] Integrate[(1 - 2 x)/x^2, {x, 0, b}] The first one gives infinity, the second a closed solution, though technically they should be the same, right?
  42. V

    Weird problem for finding load resistance value.

    Hello 2 all ! I am a student on electrical engineering, and i have the following problem to solve: Homework Statement An electrical circuit includes a dc voltage source with an internal resistance, and a load resistance. Determine the value of the load resistance R (with a precizion...
  43. M

    How to Prove a2+b2 >= 2ab and x2+y2+z2 >= 1/3 c2?

    Homework Statement Show that a2+b2 =>2ab, and hence, if x+y+z=c, show that x2+y2+z2 => 1/3 c2 Homework Equations The Attempt at a Solution How to prove this when we only have unknowns? The only thing i can think of for the first one is a (a+b)2= a2+b2 +2ab, but how to prove that a2+b2 =>2ab...
  44. C

    Laplace transform of a weird function

    So, the definition of Laplace transform is: \int_{0}^{\infty} e^{-st} f(t) dt what if: f(t) = g(t)exp\Big[-\int_{0}^{t}g(t')dt'}\Big] Or, in words: if the function being transformed is itself a function of an integral. This seems somewhat tough, but maybe I just...
  45. T

    What Causes These Unique Swirly Ice Formations?

    http://www.spaceweather.com/submissions/large_image_popup.php?image_name=Michael-French-swirlyICE_1296508078.jpg" These are pretty cool looking. Any theories as to how they form backwards from the braided wire?
  46. K

    Studying Recording book chapters as 'audiobooks' for studying - weird or just unusual?

    Hi, I am a Master's student in mainly theoretical physics. When I studied in my Bachelor's, I really didn't enjoy the examns very much: I had a systematic clockwork learning style for preparing myself for the examns. The result is that I usually get the desired (very good) grade, but...
  47. D

    Solving 2n.Cos^2(n)=1000 - Tips & Tricks

    Homework Statement Solve for n: 2n.Cos^2(n)=1000 The Attempt at a Solution So, I think there's a substitution involved here. I tried to rearrange cosine in terms of sine to make it into a quadratic but that didn't work. I've gone through all the table trig identities. I've had other...
  48. H

    Global Warming: What Happens to Day Length if South Pole Melts?

    Homework Statement I swear this is the weirdest question I've encountered: If the South polar ice cap melts completely due to global warming, then what do you expect to happen to the length of the day? 2.Choices a. It will get slightly longer b. It will get slightly shorter c. It will...
  49. Totalderiv

    Solving Weird Integral Problem: \int (x+8)/(x+4) | AP Calculus Bonus Question

    Homework Statement \int (x+8)/(x+4) Homework Equations N/a The Attempt at a Solution I tried to split the problem which resulted in: \int x/(x+4) + \int 8/(x+4) But now I'm stuck,and this is a bonus question on my AP Calculus homework.
  50. P

    Found a weird mechanical device in the woods.

    http://img522.imageshack.us/i/0108111458.jpg/ I found this weird mechanical device in the woods near my house. There seems to be some kind of serial number on it that reads, "DY6-6" http://img828.imageshack.us/i/0108111753.jpg/ It also says, "MADE IN USA" on the other side. The flywheel...
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