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. Specter

    Why does the cross product of two direction vectors....

    Homework Statement [/B] Hopefully this is in the correct section I looked around for others but this seemed like the right one. Find the scalar, vector, and parametric equations of the plane that passes through the points P(1,0,4), Q(3,1,-6), and R(-2,3,5). Homework EquationsThe Attempt at a...
  2. Logic hunter

    B Direction of buoyant force on sunken object?

    We say that buyont force act upwards (in usual cases) and that the normal force exerted by the base of a container (of liquid) on a object is less than its true weight, so a weghing machine will give smaller reading (in terms of value) than expected. But suppose a cube sinks in water. Now water...
  3. Borek

    Best Art Direction - translation?

    So it all starts with the fact that the game Return of the Obra Dinn (I love it, just in case you wonder) won Best Art Direction during The Game Awards 2018. We discussed it here with a friend of mine and turned out we understood the name of the category differently. In Polish direction and...
  4. Krushnaraj Pandya

    Relation between vector length and direction ratios

    Homework Statement A vector r has length 21 and direction ratio's 2,-3,6. The direction cosines of r, given that r makes an obtuse angle with x-axis is given by? Homework Equations l/a = m/b =n/c ...(1) (l,m,n are direction cosines, a,b,c are direction ratios l^2 + m^2 + n^2=1...(2) The...
  5. C

    What is the Direction of Normal Force in Static Equilibrium on a Ramp?

    Homework Statement Part a of the image below. When I try to solve this question, I can't get the solution in the answer key. In the answer key the y component of the normal force is NCos(alpha) in the last line. Does the normal force not point perpendicular to the ramp? Homework Equations...
  6. Krushnaraj Pandya

    Can a direction cosine squared be negative?

    Homework Statement A line makes some angle T with each of x and z axis, and angle U with y-axis so that sin^2(U)=3sin^2(T). Homework Equations 2cos^2(T)+cos^2(U)=1 ...(i) cos^2(x)+sin^2(x)=1 The Attempt at a Solution Using the above two eqns. give us the correct value for cos^2(T) which is 3/5...
  7. astroman707

    Physics Is gravitational wave research a smart direction to go in?

    Is it a fair prediction to state that in the next several years or so, globally, there will be major investments into gravitational wave research, and many more ‘LIGOs’ being developed? Is it a good idea to venture into that area of physics?
  8. Akash47

    Why we use the conventional direction for current flowing?

    I often get confused that why we have to use the ancient idea for the direction of current flowing.I have come to know a very weak reason for it.It is said that when current was first discovered,it was assumed that the current flows from the positive region to the negative region(using the idea...
  9. Hawkingo

    B How to specify the direction of an area vector?

    We all know that the area of a triangle having consecutive sides as ##\vec { a }## and ##\vec { b }## has the area ##\frac { 1 } { 2 } | \vec { a } \times \vec { b } |## but what is the direction of that area vector? I mean if we consider ##\vec { a } \times \vec { b }## that will be one...
  10. M

    Direction of acceleration of an incline

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  11. Dueschnozzle

    Torque-Free Precession and Wobble direction

    In Torque-Free Precession of a plate, can the direction of the Wobble be either in the spin direction or retrograde to it? For instance if you tossed the plate upward vs downward with the same spin direction. Would the wobble direction and frequency be inverse?
  12. G

    Confusion about the direction of the vectors: motional EMF

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  13. B

    A Spin direction of quarks in a baryon

    If all three quarks in a baryon have the same flavor, they all spin the same direction, causing the baryon to have 3/2 spin. In a proton, do both up-quarks spin in the same direction (with the down-quark spinning opposite)? Or can the two up-quarks spin in opposite directions?
  14. J

    The direction of induced current and magnetic field produced

    Homework Statement The figure below shows a small circular loop of wire in the plane of a long, straight wire that carries a steady current I upward. If the loop is moved from distance x_2 to distance x_1 from the straight wire, what will be the direction of the induced current in the loop and...
  15. Celso

    Nullifying Lorentz Force on Proton Moving in Parallel Direction

    Homework Statement A proton moves with a speed ##v = 3 \cdot 10^5 \frac{m}{s}## in the parallel direction to ##i+k##. A magnetic field of ##1T##, in the ##i+j+k## acts over it. Which electric field must we apply in this region so that the Lorentz force over the proton is null? Homework...
  16. Wikeboy

    Calculatethe direction of a wave

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  17. Javier Lopez

    What is the magnetic field off-axis in the y direction?

    I used the following links: C++ software using elliptics integral at: https://tiggerntatie.github.io/emagnet/offaxis/elliptic_c.htm And the calculator here: https://tiggerntatie.github.io/emagnet/offaxis/iloopcalculator.htm I placed some values and obtained Br smaller than Bx, so I do not know...
  18. YMMMA

    What is the direction of the velocity/ elastic collisions.

    Homework Statement in the attached file Homework Equations Momemtum = mass - velocity The Attempt at a Solution I solved it E. Since object 2 has the larger mass, the effect is less and will move backwards a little bit.
  19. YMMMA

    Magnetic force direction on a positive and negative charges

    Homework Statement The question askes about the path of the electron. I need to know if I am doing it correctly whether it was asked for a proton or an electron. Homework Equations F=QV⊥Bsinθ The Attempt at a Solution I answered it C. Because it is an electron, I used my left hand. My thumb...
  20. M

    B What is the relationship between gradient and surfaces in tensor calculus?

    <Moderator's note: Moved from a homework forum.> 1. Homework Statement Is the gradient perpendicular to all surfaces or just level surfaces? For instance, if I I have a function f(x,y)=z where z is the dependent variable then that is a surface, wouldn't that be a level surface to a function of...
  21. S

    Kinetic friction direction on two stacked blocks

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  22. T

    Determining the direction and origin of the Hall current

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  23. nuuskur

    A Existence of (sequential) feasible direction

    Having trouble with something that's likely too trivial, but here goes.. In Optimization theory and nonlinear programming [Sun, Yuan] the following is discussed at section 8.2. Consider the optimisation of f:\mathbb R^n\to\mathbb R with constraints g_j:\mathbb R^n\to\mathbb R, g_j(x) = 0...
  24. jaketodd

    B Inertial Objects: Acceleration & Direction

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  25. alexi_b

    Finding the angle in which the resultant force points

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  26. I

    I Is There a Preferred Direction in Time?

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  27. O

    How to figure out the velocity and direction of the wind

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  28. isukatphysics69

    What is the magnitude and direction of the electric field

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  29. Amaterasu21

    I SR Light Wavelength & Direction: Questions Explained

    Hi all, I have two questions about light in Special Relativity. (I'm going to pad these questions out with a few statements about my understanding of length contraction and time dilation, so you can see how I currently think about it and clear up any misconceptions if I've got the basic idea...
  30. N

    I Length Expansion Opposite Direction: SR Simultaneity Explained

    SR says that there is length contraction in the direction of movement. This works nicely for light going from the back of the ship to the front. From my perspective, the ship is moving away but that is offset by the ship's contraction. But things get tricky for light going from the front of the...
  31. DracoMalfoy

    Kinematics: Motion in One Direction: Car Chase

    Homework Statement A car traveling at a constant speed of 24.0m/s passes a trooper hidden behind a billboard. One second after the speeding car passes the billboard, the trooper sets off in a chase with a constant acceleration of 3.0m/s^2. A) How long does it take the trooper to overtake the...
  32. T

    Can Gamma Rays Be Artificially Directed?

    Is there a process that can artificially change the direction of photons?
  33. V

    Direction of friction in circular motion

    Homework Statement I can't understand why friction acts radially inwards when a body is rotating on a rough turntable. If the friction is removed, the body would move tangentially, hence it has slipping tendency tangential, not radially outwards, then shouldn't friction act tangentially...
  34. C

    Direction of magnetic field experienced by wire

    Homework Statement Homework EquationsThe Attempt at a Solution I know that, according to the right hand rule, the direction of the field lines for X and Z are anti-clockwise and Y is clockwise. What do I do next? Thank you!
  35. C

    I People pulling rope, one in a perpendicular direction

    Let's say that we have two guys, each weighs 50 kg. They are pulling a piece of against each other as hard as they can. The tension of the rope will therefore be the force of friction acting on each of them (the same magnitude). Now, let's say that a third person joins the party and grabs the...
  36. Krushnaraj Pandya

    What Is the Direction of Force on a Dielectric Slab in a Capacitor?

    Homework Statement A constant potential is maintained across a parallel plate capacitor. A dielectric slab is slowly inserted between the plates (width of slab=distance between the plates). What will the direction of force applied by capacitor on dielectric be? Homework Equations All relevant...
  37. navneet9431

    What does the direction of angular velocity indicate?

    Angular velocity is the rate of angular displacement about an axis. Its direction is determined by right hand rule. According to right hand rule, if you hold the axis with your right hand and rotate the fingers in the direction of motion of the rotating body then thumb will point the direction...
  38. mheruian

    Winding Direction Consideration (Proper Winding)

    Hello, I'm boy who suddenly been strucked by curiosity on how hand crank generator works and i watch and read some of how to create one, specially this one on youtube: and i want to create one but i don't have a 3D printer, but i saw some alternative but as i do/design my own coil based on...
  39. L

    A The k direction in a k.p model ?

    I am trying to do some calculation based on a k.p model of GaN proposed by S. Chuang [Phys. Rev. B, 54, 2491]. It is a 8 by 8 Kane model with basis functions: The 8 by 8 Hamiltonian contain first order of k is where ##{k_ \pm } = {k_x} \pm i{k_y}## the reciprocal space and high symmetry...
  40. W

    The direction of an electrical current

    OK, so my last post seemed meaningless. Can anyone help with this, I understand some of you say current moves from the positive terminal of a battery to the negative terminal and some say the opposite. Lets say it is positive to negative just for this question. If I have a battery that the...
  41. K

    I Determining Plate direction by having three point of it.

    Hi all, Can anyone help to solve this problem? Imagine a big plate suspended in the air through three threads with different length. we know length of each individual thread, and they are 120 degree apart from each other. How cam we calculate the tilt of the plate and direction of the tilt?
  42. darth boozer

    Sudden reversal in a simple 3-phase motor's direction

    Watching an old Royal Institution Christmas Lecture, given by Prof. Eric Laithwaite in 1974, there was a demonstration of a simple 3-phase induction motor. As the applied voltage was increased, the direction of spin suddenly reversed at about 203 volts. I have never found an explanation for...
  43. J

    Direction of induced current in the loop

    Homework Statement Homework EquationsThe Attempt at a Solution I am having a little doubt as to how to think of the moving electron as a current . I am considering the moving electron as a very tiny (infinitesimal ) current element . It is as if when the electron is at A , there is a very...
  44. T

    Simple Question about the direction of magnetic induction

    Homework Statement There is a magnetic field B=0.02 Tesla and its direction is toward the plane (perpendicular to plane, shown by X X X X X - I'm not sure how to say this direction in English,sorry). we have a copper wire (uniform bar) perpendicular to magnetic field from south to north. we...
  45. J

    A Photon direction as hidden variable in a double slit expt?

    I was wondering if it would be feasible to set up something like the following experiment to validate the pilot wave theory. The idea here is to set up a double slit experiment, but control the initial conditions of photons emitted from a source (i.e., their directions) such that one can...
  46. H

    Find the scalar value and direction of the electric field

    Homework Statement Two charged balls are placed in point A and B and the distance between them is 9,54cm. Each of the balls are charged with 8,0 x 10^-8 C. Find the scalar value and direction of the electric field in point C placed 5 cm from A and 6 cm from B. Homework Equations Cosine Rule...
  47. T

    What is the direction of the electric field inside a battery?

    Outside the battery, in the conductor it is in the direction of conventional current. But what about inside? Since magnetism and electricity are related, and magnetic field inside a magnet is from South to North (outside it is North to South), i doubted for any correspondence.
  48. B

    Direction of The Force of a Wall Exerted on a Rod

    Homework Statement A rod is attached to a wall in such a way it can swivel. In this case: In which direction does the force (of the wall on the rod) point to? Here are two examples (see under attached files), but the the direction of the force is different. Why? Is maybe one of the pictures...
  49. isukatphysics69

    Find the direction of a blob of clay after impact?

    Homework Statement Homework Equations impulse = mv The Attempt at a Solution so i found the velocity of the blob of clay now i am trying to find the direction. i took the xcomponent initial stuff which was 0.04kg*4m/s*cos45 - 0.03kg*3m/s Then set it to the final x component stuff which i...
  50. P

    Direction of electromagnetic field

    Homework Statement [/B]In this question, it asks for the magnetic field associated with the electromagnetic wave. Homework EquationsThe Attempt at a Solution The magnetic field is perpendicular to Electric field but it can be in either x or z direction...how do I choose the direction.I
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