Direction Definition and 999 Threads

One Direction, often shortened to 1D, are an English-Irish pop boy band formed in London, England in 2010. The group are composed of Niall Horan, Liam Payne, Harry Styles and Louis Tomlinson; former member Zayn Malik departed from the group in March 2015. The group signed with Simon Cowell's record label Syco Records after forming and finishing third in the seventh series of the British televised singing competition The X Factor in 2010.
Propelled to global success by social media, One Direction's five albums, Up All Night (2011), Take Me Home (2012), Midnight Memories (2013), Four (2014), and Made in the A.M. (2015), topped charts in most major markets, and generated hit singles including "What Makes You Beautiful" (their first number one on the UK Singles Chart, and the highest debut for a British act on the US Billboard Hot 100 since 1998), "Live While We're Young", "Best Song Ever", "Story of My Life" and "Drag Me Down". After the release of Four, One Direction became the first band in the US Billboard 200 history to have their first four albums debut at number one. Their third album, Midnight Memories, was the best-selling album worldwide of 2013.Considered teen idols, One Direction were often subject to fan hysteria. They embarked on four world tours, two of which were all-stadium. The band's Where We Are Tour, in support of Midnight Memories, was the highest-grossing concert tour in 2014, the highest-grossing tour by a vocal group in history, and the 15th highest-grossing concert tour of all time, grossing $290.2 million (unadjusted for inflation). The band went on hiatus in January 2016, allowing all members to pursue other projects.As of 2020, the band have sold a total of 70 million records worldwide, making them one of the best-selling boy bands of all time. The band have won nearly 200 awards, including seven Brit Awards, four MTV Video Music Awards, six Billboard Music Awards, seven American Music Awards (including Artist of the Year in 2014 and 2015), and 28 Teen Choice Awards. In 2013, they earned an estimated $75 million, becoming the second highest earning celebrity under 30 according to Forbes. As the world's best-selling artist of 2013, the group was named the Global Recording Artist of the Year by the International Federation of the Phonographic Industry. In 2014, Billboard named the band "Artist of the Year". Forbes ranked them as the fourth highest-earning celebrities in the world in 2015, and second in 2016.

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  1. Bell

    What's the direction of electric field in Laguerre-Gaussian beams?

    As for Laguerre-Gaussian beams, the direction of wave vector is helical, and how about the direction of electric field? I found that there was little literature mentioned this.
  2. P

    Gauss Law Problem direction of Area

    My attempt is ∅ = ∫E.dA. The direction of E is going out of the net towards +ve i axis. I am not clear on the direction of the Area, it can be either +ve i-axis or -ve i-axis. Which direction should i consider? ∅ = ∫3.dA = 3*∫dA ---->1 ∫dA is the area of the circle. A = π * (0.11)^2 = 0.038...
  3. A

    [Magnetism] Determine the direction of the force experienced by a (+)C

    Given: q = 1.6*10^-19 C B = 0.3 T north v = 3*10^6 m/s north-west θ = 37 (degrees) Solution Attempt: a) F = Bqvsinθ = (0.3)(1.6*10^-19)(3*10^6)(sin(37)) = 8.7*10^-14 N b) Via right hand rule, F is into the page c) a = F/m = 8.7*10^-14/1.6 × 10^−27 = 5.4*10^13 m/s^2 When I checked my answers...
  4. Z

    Electric field direction on a grounded conducting sphere

    I am required to find the direction of the electric field on the surface of a grounded conducting sphere in the proximity of a point charge ##+q##. The distance between the center of the sphere and the point charge is ##d## and using the method of images we find that the charge of the sphere is...
  5. H

    How to change pulley direction?

    Hello Guys, Maybe someone can be at my assistance in this one. I have a similar airer as on the attached picture and i would like to change a set up of pulleys and possibly to add some more of them, in a way that I do not want to pull it down by the side wall anymore. Instead, I would prefer...
  6. P

    How do I find the angle and direction of a magnetic field?

    Again struck up with the direction of the magnetic field, i suppose now the field not simple along the x axis. How to find the angle and the direction of the field. My attempt is B1 = (μ*i)/(2*π*r) = (4*π*4)/(2*π*4) = 200nT where r = d2 = 4; is the field due to i1. B2 = (μ*i)/(2*π*r) =...
  7. M

    Understanding the Direction of Rotation for Stress State Equations

    Hi, The context for my question is: A thin plate, which lies in the x-y plane, contains a small hole of radius a . Consider a polar co-ordinate system r,􏰆 with its origin at the centre of the hole and 􏰆defined as the angle that a radial line makes with the x-axis. A uniform uniaxial tensile...
  8. DaveC426913

    What DOES the direction of a ceiling fan do?

    Is there a reason? My hypothesis is that running a fan one direction versus the other direction has little direct effect on circulation - the air moves in a toroidal shape - either upward or downward either way - the only real difference is that downward creates a direct draft/breeze, whereas...
  9. D

    Chemistry What determines the direction of a reaction under standard state conditions?

    For (1), I got the correct answer which is 28.76kj/mol. For (2), the answer given is since Δ G > 0, the reaction proceed to left. I understand the meaning but what means by ' If reactants and products were mixed in their standard-state concentrations', is it indicate it is under standard state...
  10. W

    Effects of a Change of Direction of the Rotation of the Earth?

    Summary: What if the Earth rotated about its axis in a N-S direction instead of doing so in an E-W direction. Hi, Just curious: What would be the effects/consequences if the Earth rotated about its axis in a North-South ( or South-North) direction instead of an East-West one as it currently...
  11. srallaba

    B Probability of spin in the +x direction

    Consider a qubit. Given a state equation, how to calculate the probability of finding spin in +x direction?
  12. J

    Quaternions and Direction Cosine Matrix changing in time

    I've already posted this question on the mathematics website of stack exchange, but I've received more help here in the past so will share it here as well. I am developing a tool for missile trajectory (currently without guidance). One issue is that the aerodynamic equations on the missile are...
  13. danihel

    Why does a piston-powered wheel keep turning in one direction?

    Hi, First I'd like to apologize, for this question probably sounds devastatingly stupid to people on the forum. Why does the wheel powered by a typical locomotive steam engine rotate only in one direction? I don't even understand why doesn't it sometimes just rotate half-way around and then...
  14. A

    Plasma current direction in the presence of an external field

    A simple question, I read that the particles in a plasma (protons , electrons) travel along the B field lines in a plasma which I know and they loop around the field lines each in opposite direction (clockwise, anticlockwise ) but both in the same direction. My question then is this. If I have...
  15. R

    I Airflow direction -- Improving the cooling of my computer

    Hi, First of all I am sorry if I post in an incorrect thread. I can ask my question in PC forums but I thought it probably better if I ask in physics forum. So, I am trying to make the temperature in my PC better by adding additional fans, however I can't really place the fans in whatever...
  16. Abdullah Younas

    Finding the magnitude and direction of a boat's motion

    Homework Statement: A boat is traveling upstream in the positive direction of an x axis at 14 km/h with respect to the water of a river. The water is flowing at 9.0 km/h with respect to the ground.What are the (a) magnitude and (b) direction of the boat’s velocity with respect to the ground...
  17. M

    Determine the change in direction of a particle

    Note: I don't know if this actually qualifies as advanced physics, it probably doesn't. It's a review problem in a non-introductory class but I can't solve it so... Beginning with the hint, I know that the x and y components of velocity don't change when the particle moves from z < 0 to z > 0...
  18. K

    Changing KMESH/KINTS from azimuthal to polar direction in MCNP6

    I am modeling a cylindrical source in MCNP6 and would like to use the FMESH tally in cylindrical coordinates. I am looking for the dose to water from the source as a function of radial distance as well as polar angle running from 0 to 180 degrees in the YZ plane not around Z. Is there a way to...
  19. H

    I Is an electron's spin always in some definite direction?

    In other words, does there exist, for an electron, a definite direction in physical space such that a measurement of its spin along that direction always give spin up, 100% of the time?
  20. UnPetitGarcon

    Direction of a rope with a ball inside an accelerating box

    A steel washer is suspended inside an empty shipping crate from a light string attached to the top of the crate. The crate slides down a long ramp that is inclined at an angle of 37° above the horizontal. The crate has mass 180 kg. You are sitting inside the crate(with a flashlight); your mass...
  21. S

    Direction of the net force acting on a pendulum

    I imagine y - axis is parallel to direction of A and x - axis is parallel to direction of E. There are two forces acting on the pendulum: tension in direction of A and weight in direction of D. I break the weight into 2 components: W sin θ in opposite direction to tension and W cos θ in...
  22. karush

    MHB 243 parametric equations and motion direction

    11.1 Parametric equations and a parameter interval for the motion of a particle in the xy-plane given. Identify the paritcals path by finding a Cartestian equation for it $x=2\cos t, \quad 2 \sin t, \quad \pi\le t \le 2\pi$ (a) Identify the particles path by finding a Cartesian Equation the...
  23. M

    What can be used to change the direction of the laser beam?

    Let's say we have a laser beam coming from a source called X, we would like to change its direction so that it would hit directly on the object that we have. What would be the possible solutions?
  24. M

    B Experiment reverses the direction of heat flow

    I hope this is the correct section to post this but I found it very is interesting Link to original article: https://phys.org/news/2019-06-reverses.html Quotes from the article: "We investigated temperature changes in the spins of the nuclei of the hydrogen and carbon atoms. The chlorine...
  25. Benjamin_harsh

    What direction is the force acting at A in this diagram?

    What direction is force acting at A in this diagram?
  26. B

    Direction of the induced current from an OCR paper -- concept question

    I am not sure in which direction this induced current would be I am assuming you have to use the dynmo rule or the right hand rule as this is the induced current, and the soft iorn core will cause a force to be produced in the coil which causes the current. If so in which direction would the...
  27. S

    Is Time Just Another Coordinate Axis That We Can Only See Moving Forward?

    Is it possible that time is just another coordinate axis? That it can be moved freely into backwards and forwards at any speed. And for some reason we as humans can only see it moving forward? and communicate at a definite speed in time. Maybe everything is already calculated and solved, and...
  28. jmemo

    Find the direction and magnitude of an electric field

    Find the direction and magnitude of an electric field that exerts a 4.65 ✕ 10−17 N westward force on an electron. (Enter the magnitude in N/C.)
  29. patric44

    What is the direction of work in this figure?

    iam not sure of the direction of work , is it positive becouse pulleys change the direction of the force ? or is it negative because of the arrow that indicates the direction of acceleration ??!
  30. Electgineer

    Is there a better way to assign current direction in circuit analysis?

    Is there like a rule of thumb, or a simple hack for assigning current direction in circuit analysis? Even when I m consistent with the direction I choose, I still get the wrong answer most of the time. Like 1. Do current source or voltage source affect when choosing current direction? 2...
  31. themountain

    The magnitude and direction of the minimum magnetic field

    F=ILB F=(48)(.76)B F/36.48=B I am stuck at how to find F, is there a different formula I am missing?
  32. Curtiss Oakley

    Bowling Ball Changing Rotational Direction

    I already have a and b, but want to see if anyone is willing to verify my answer for part c. I get 0 for the frictional force between the ground and ball, which would lead d and e to be 0 as well. Physics is rarely that easy so I wanted to make sure I didn’t miss anything.
  33. J

    Direction of current in smaller loop on the left and on the right

    Lets say the current in the larger loop is counterclockwise. Then it doesn't matter if the smaller loop is to the right or to the left of the larger one, the induced current in it will always be clockwise. The magnetic field due to the smaller loop current always points in the negative...
  34. W

    The direction of magnet field

    for a infinite length length of current, only consider a part of it, is the direction of magnet field of a ring on the mid vertical plane the same magnitude and along the tangential direction? and for a closed surface , if the flux is 0?
  35. dRic2

    Scattering direction and probability

    Hi, I'm having some trouble understanding the following result. Let's immagine a collision of two point particles in which one can be considered at rest and suppose the scattering process viewed in center of mass frame is isotropic. Then the probability of one particles to be scattered in one...
  36. J

    In what direction does a light wave vibrate?

    I've wondered this for a while but not known how to ask the question, If light is a transverse wave, then what is it transverse to? To elaborate, light travels in three-dimensions, radially. To me, this seems analogous to the sound wave, with pulses of pressure moving longitudinally to the...
  37. M

    Twin spring system with a mass in between (X and Y direction)

    Hello my fellow scientists! This is my first post on this forum, but most certainly not my last. I am relatively new to physics. I mean, i understand the basics. I would like to make it my hobby. You know, really find a passion for the physics. BTW, i am from the Netherlands, so please do not...
  38. P

    Calculate the magnitude and direction of the torque

    Homework Statement [/B] a) (a) Assuming the HCl molecule consists of point-like ions (H+ and Cl) separated by 1.0 * 10^-10m, find the dipole moment of the molecule. b) Calculate the magnitude and direction of the torque exerted on this dipole if the molecule is subjected to an external electric...
  39. Lapse

    What is the final V in the vertical direction?

    Homework Statement Homework Equations Vy2 = Vyo2 + 2ayt y = 1/2(Vyo + Vy)t The Attempt at a Solution So I have "solved" this problem with both the equations above. Using the Vy2 equation I get the result of 32.83m/s. Using the other equation I get a result of zero, because Δy = (0 - 55) =...
  40. J

    Who defined the positive direction of the magnetic field?

    This is about the history of electromagnetism. I already know about the convention that defined which electric charge is the "positive" one, which ended up making the electron a negative particle. But what about the "positive" direction of the magnetic field? Does anybody here know how it was...
  41. Rahulx084

    Shear stress direction and the velocity gradient

    1)In a flowing fluid in laminar fashion we know that it flows in planes which slides over each other, Let's take a fluid element (cylindrical) in a pipe(Radius=R) the resistive force is (stress)(cross section area of cylinder with radius 'r') acting in backward direction, now if I take Flow...
  42. S

    Direction of the magnetic field of the Earth

    So, I have had a bit of a look around and can't come up with a concrete answer, so I thought I'd post my curiosity on here! What is the direction that a compass points in 3 dimensional space, and how is this affected by proximity to North? to clarify what I mean: We all know that compasses...
  43. SebastianRM

    I What is the gravitational component in the radial direction?

    Hey guys, I reading over Taylor's Classical Mechanics book. Chapter 9, Centrifugal Acceleration Section. In p.346 he mentions that for a free fall acceleration: g = g_0 + Ω^2 * Rsinθ ρ Where its radial component would be...
  44. W

    B 4 four momentum energy component direction

    I have been reading about four momentum. There are four component vectors, three spatial, momentum, components and a time, energy, component. They each have a direction. I understand direction for the momentum components, being in the direction of the respective spatial components of the...
  45. Another

    I The component of the total spin in the direction of H

    i don't understand, Why The component of the total spin in the direction of H is ##M_s = \frac{1}{2}(N_{up}-N_{down})##
  46. F

    B Why most stars seem to rotate the same direction in a galaxy?

    After much questioning and soul-searching I got my answers of why galaxies rotate, and for that I greatly thank the gurus in the forum (so I'll not forget: conservation of initial angular momentum, non-isotropic material scattering, slowdown of infalling materials and non-isotropic infalling of...
  47. iVenky

    I Direction of E field and propagation of wave in a conductor

    We know that skin depth in a conductor is found using the following expression, (Credits: http://farside.ph.utexas.edu/teaching/315/Waves/node65.html) Basically, as the wave propagates in a conductor, it's electric field strength reduces and reaches 1/e of it's initial value at the skin depth...
  48. I

    Direction of friction in yo-yo where applied force is at top

    Homework Statement We have a yo-yo and the force ##F## which is the tension in the string and this is at the top tangent as shown in the figure attached with this problem. I want to figure out the direction of the friction at the point of contact. Homework Equations Newton's laws of motion...
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