What is Uniform: Definition and 1000 Discussions

A uniform is a type of clothing worn by members of an organization while participating in that organization's activity. Modern uniforms are most often worn by armed forces and paramilitary organizations such as police, emergency services, security guards, in some workplaces and schools and by inmates in prisons. In some countries, some other officials also wear uniforms in their duties; such is the case of the Commissioned Corps of the United States Public Health Service or the French prefects. For some organizations, such as police, it may be illegal for non members to wear the uniform.

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  1. C

    Difference b/w uniform motion and velocity

    Homework Statement Is there any real difference between uniform motion and uniform velocity? Am asking this question because the defination of the two concept are complicating. Homework Equations The Attempt at a Solution Uniform motion can be defined as a motion which covers...
  2. E

    Relationship of W and v in a region of uniform magnetic field

    Homework Statement https://dl.dropbox.com/u/63664351/Physics/Electromagnetic%20Induction.PNG https://dl.dropbox.com/u/63664351/Physics/Electromagnetic%20Induction%20Answers.PNG Homework Equations W=mas. Unknown relation between W v and BThe Attempt at a Solution dW = m a ds = m dv/dt ds dW/dv...
  3. D

    Uniform Electric Fields: Understanding Coulomb's Law and Field Intensity

    Coulomb's Law F = kqq/r^2 Why does the intensity of a uniform electric field not get weaker in the middle? I would understand this if the intensity over distance was a linear function, but it isn't. The force near one of the plates would approach infinity, because r^2 is so small... but in...
  4. P

    Uniform Tension of Rope with Mass

    I am having trouble puzzling this one out. What I am trying to understand is why the tension of a rope is uniform throughout (even when there is mass). So I have knowledge that tension is in fact not a force (as it is a scalar quantity). You have two people pulling on a rope in opposite...
  5. F

    Finding velocity and displacement at any time during uniform acceleration motion

    Was not sure whether to post this here on the general forums, as it does kind o relate to coursework, just not directly. The four equations of uniform accelerated motion. Can you use them to find the velocity and displacement at any specific time by simply just using 't' as the time you are...
  6. P

    MHB Families of holomorphic functions and uniform convergence on compact sets

    Consider the sequence $\{f_n\}$ of complex valued functions, where $f_n=tan(nz)$, $n=1,2,3\ldots$ and $z$ is in the upper half plane $Im(z)>0$. I want to show two facts about this sequence: 1) it's uniformly locally bounded: for every $z_0=x_0+iy_0$ in the upper half plane, ther exist...
  7. P

    Bar of uniform mass hinged to the ceiling.

    Hello, Homework Statement A uniform bar of mass m is hinged to the ceiling and rests on a smooth floor at an angle α with respect to the vertical axis (please see attachment). A thin sheet of paper, with coefficient of friction μ, is inserted between the floor and the bar. What is the...
  8. J

    Uniform Convergence and the Uniform Metric

    Let X be a set, and let fn : X---> R be a sequence of functions. Let ρ be the uniform metric on the space RX. Show that the sequence (fn) converges uniformly to the function f:X--> R if and only if the sequence (fn) converges to f as elements of the metric space (RX, ρ). [Note: the ρ's should...
  9. A

    A question about uniform convergence

    Homework Statement For question 25.15 in this link: http://people.ischool.berkeley.edu/~johnsonb/Welcome_files/104/104hw9sum06.pdf I have some questions about pointwise convergence and uniform convergence... Homework Equations The Attempt at a Solution Our textbook says...
  10. A

    A question about uniform continuity (analysis)

    Homework Statement For question 19.2 in this link: http://people.ischool.berkeley.edu/~johnsonb/Welcome_files/104/104hw7sum06.pdf I came up with a different proof, but I'm not sure if it is correct... Homework Equations The Attempt at a Solution Let |x-y|< \delta For...
  11. V

    Need explanation of theorems on Uniform continuity

    I'm taking my first course in Analysis, and we learned a couple of theorems about Uniform Continuity. I have been able to visualize most of what's been going on before, but I need some help with the following: E \subseteq ℝ, f: E \rightarrow ℝ uniform continuous. if a sequence xn is Cauchy...
  12. M

    Bending a Beam to Produce Uniform Tension

    Hello. I am attempting to build a fixture which will place uniform tension onto one surface of a rectangular beam. I know that I must force the beam to deflect along a set path, but I am having trouble determining what the equation for this path needs to be. Any guidance on this would be...
  13. dexterdev

    How to convert a gaussian distributed rnd sequence to uniform dist and viceversa

    Hi PF, I have a device (with a microcontroller) which generates random numbers. when I analyzed those numbers using Matlab software I found that it is following a uniform distribution. How can I mathematically (any algorithm?) convert this random output to a gaussian one. Also I would...
  14. A

    A question about uniform distributions

    If we have a uniform distribution on [0,x]...then the pdf is 1/x right? But what if we have [0,x)? Do we still have the same pdf? Thanks in advance.
  15. T

    Work Energy Theorem and Uniform Disc Problem

    Homework Statement Using work energy theorem, solve: The Attempt at a Solution The actual answer (3.11s) is exactly half of my answer. Does anyone know what I did wrong?
  16. P

    Electric field from uniform charge of finite length

    Homework Statement A uniform charge Q of length L is placed on the x-axis with one end at the origin as shown a) Find the contribution dE (vector) to the electric field at P on the y-axis a distance y from the origin, from the charge at x in dx, in terms of Q, L, dx, ke, x and y b)...
  17. P

    Voltage change away from long line of uniform charge

    Homework Statement Find the voltage change going from 5.0cm to 10.0cm along the radius away from a long line of uniform charge density 5.0 μC/m Homework Equations V = (kq) / r (I believe... I'm very lost) The Attempt at a Solution ΔV = ∫.05 to .1 2∏rLdL = 2∏r((L^2) / 2 | from...
  18. P

    A thin uniform bar, hanging, is hit by a ball. Find the angular velocity

    Homework Statement A thin, uniform metal bar, 3m long and weighing 75N, is hanging veritcally from the ceiling by a frictionless pivot. Suddenly it is struck 1.3m below the ceiling by a small 2 kg clay ball, initially traveling horizontally at 14m/s. The ball sticks to the bar Find the...
  19. J

    Decaying particle in uniform magnetic field; what was the rest mass?

    Homework Statement An unstable particle, initially at rest, decays into a pro- ton (rest energy 938.3 MeV) and a negative pion (rest energy 139.5 MeV). A uniform magnetic field of 0.250 T exists perpendicular to the velocities of the cre- ated particles. The radius of curvature of each...
  20. X

    True or false? a conductor through a uniform magnetic field produces NO emf

    Many sources on the web claim that when moving a conductor through a magnetic field, an emf is produced. However, some sources claim, that the intensity of the magnetic field also needs to change in order to produce a voltage over the conductor, for example...
  21. S

    Uniform convergence integration

    f is a continuous function on [0,infinity) such that 0<=f(x)<=Cx^(-1-p) where C,p >0 f_k(x) = kf(kx) I want to show that lim k->infinity ∫from 0 to 1 of f_k(x) dx exists so my idea is if I have that f_k(x) converges to f(x)=0 uniformly which I was able to show and that f_k(x) are all...
  22. M

    What is the nature of a uniform electric field?

    Also, if a particle is traveling through a uniform electric field, does anything change as it leaves the field if the electric field strength increases? If you're asked to find the magnitude, is it just the modulus of those values? What is a vector?
  23. C

    Calculating the mass of a beam of non uniform density.

    Been doing some physics problems from my mechanics class. This is the first time I've attempted a problem like this and am not so confident with solving it, I could be correct and just being paranoid but I just have a feeling I've made a mistake somewhere, would appreciate if someone who is...
  24. U

    Uniform grid of points on a sphere

    How can one create a uniform solid-angular distribution of vectors in 3D space from a common origin, or in other words a grid of points on the surface of a sphere wherein the points are equidistant from each other? Spherical polar coordinates/the latitude-longitude scheme is obviously not the...
  25. S

    Uniform linear splines is my equation correct?

    The question as stated: Define the uniform linear splines Hk:=H0(x−k), k=−1,0,1,2,3, where H0={x, 0≤x<1, 2−x, 1≤x<2, 0, otherwise. For k=−1, I would get: H−1={x+1, 1≤x<2, 1−x, 2≤x<3, 0, otherwise. Is that correct? Thank you.
  26. M

    Explanation of uniform topology theorem in Munkres

    Hi all, I'm looking for some help in understanding one of the theorems stated in section 20 of Munkres. The theorem is as follows: The uniform topology on ##\mathbb{R}^J## (where ##J## is some arbitrary index set) is finer than the product topology and coarser than the box topology; these...
  27. J

    Uniform integrability under continuous functions

    Let X be a uniform integrable function, and g be a continuous function. Is is true that g(X) is UI? I don't think g(X) is UI, but I have trouble finding counter examples. Thanks.
  28. D

    Uniform cylinder force diagram

    Homework Statement A uniform cylinder of mass m and radius R rests in equilibrium against a rough plane that is inclined at an angle α to the horizontal. The cylinder is supported by a cord under a constant tension, wrapped round it, so that the cord leaves the surface of the cylinder...
  29. N

    Uniform accelerated motion question

    Homework Statement A sprinter runs a race with constant acceleration throughout. During the race he passes four posts A, B, C, D in a straight line such that |AB| = |BC| = |CD| = 20m. If the sprinter takes 5 seconds to go from A to B and 3 seconds to go from B to C, find out how long, the the...
  30. W

    Uniform Circular Motion of a race car

    Homework Statement A 990-kg race car can drive around an unbanked turn at a maximum speed of 42 m/s without slipping. The turn has a radius of 140 m. Air flowing over the car's wing exerts a downward-pointing force (called the downforce) of 12000 N on the car. (a) What is the coefficient of...
  31. N

    2 bodies travelling towards each other at uniform acceleration

    Homework Statement P and Q are points 162m apart. A body leaves P with initial speed 5m/s and travels towards Q with uniform acceleration 3m/s^2. At the same instant another body leaves Q and travels towards P with initial speed of 7m/s and uniform acceleration 2m/a^2. After how many...
  32. U

    Max. speed you can drive on a circular hill an still be in Uniform Circular Motion

    Max. speed you can drive on a circular hill an still be in "Uniform Circular Motion" Homework Statement The top of a hill is in the shape of a circle of radius 25 meters. Homework Equations a) What is the normal force that the road exerts on an 1800kg car as it tops the hill with a...
  33. H

    Spherical Conductor lies at the center of a uniform spherical charge sheet

    Homework Statement A ground spherical conductor of radius a lies at the center of a uniform spherical sheet of charge QB and radius b. a) How much charge is induce on the conductor's surface? Ans(-QBa/b) Evaluate V(r) at position between the conductor and the sheet and outside the sheet...
  34. A

    How do I Format Shapes in MS Word?

    hey guys and gals, I'm normally pretty good at my physics homework, but this problem has my STUMPED, I think I am starting it right, but I have no idea how to proceed or if I am on a good path. Homework Statement A Very Long Cylinder with a radius of 7.2cm (.072m) has a uniform density of...
  35. P

    Non-applicability of uniform distribution formulae?

    I have tried finding a table's length using two methods. Both should be applicable, as using a ruler implies uniform distribution, does it not? The first method involved calculating the mean length from a set of measurements, finding the variance, and substituting it in the formula for the total...
  36. S

    Moment of Inertia for a uniform wire

    Homework Statement A flat object shown here consists of a circle and square made of heavy, uniform wire and welded together at the corners of the square. The mass of the circle is M. The mass of the square is m and its side has a length d. To find the objects moment of inertia about Axis A...
  37. Z

    A strange kind of straight line kinematics with uniform acceleration.

    Homework Statement A ball is thrown upward from a building 30 meters tall and misses the edge on its way down, hitting the ground 6 seconds after it was thrown. A) With what speed was it thrown? B) What is its highest height?Homework Equations Vf = Vi + at x = 1/2(Vi + Vf) x = Vi t + 1/2(at^2)...
  38. O

    Density of product of two uniform RVs

    Homework Statement If X,Y are independent RVs ~ U[-1,1], and W=X*Y, find the density of W.Homework Equations The Attempt at a Solution I feel my approach is right, but the bounds of my final integral don't make sense. F_{XY}(w)=P(XY \leq w)=\int_{-\infty}^{\infty} P(XY \leq w | Y=y)*f_Y(y)dy...
  39. A

    Uniform Circular Motion of Swinging Objects

    I am very confused with a particular aspect of part of my physics curriculum. Let's say there is an object swinging on a rope swinging in a circular motion. The mass of the object, length of rope, and angle of rope relative to y-axis are known. How does one derive the tension of the rope...
  40. B

    Force on a Wire In Uniform Magnetic Field

    Homework Statement A long wire lying along the x-axis carries a current of 2.60 A in the +x direction. There is a uniform magnetic field present, given by B=0.003i + 0.004j + 0.002k, where i, j, k are the unit vectors along the cartesian coordinate axes') in units of Tesla. Calculate the...
  41. G

    Uniform Gravity: Fact or Fiction?

    Is a location anywhere where the force of gravity is perfectly uniform over a distance?
  42. T

    Calculating Static Friction Coefficient w/ Angle of Uniform Slip

    How do you use the angle of uniform slip to calculate the coefficient of static friction? Is there an equation for this? I cannot find it in the module on friction provided with the course... thanks! I found somewhere that tanθ=μk, but that doesn't really help me, as i am looking for μs...
  43. S

    Uniform Convergence: Intuitive Explanation

    I'm wondering about uniform convergence. We're looking at it in my complex analysis class. We are using uniform convergence of a series of functions, to say that we can interchange integration of the sum, that is: \int\sum b_{j}z^{j}dz=\sum\int b_{j}z^{j}dz=\int f(z)dz On an intuitive level I...
  44. J

    Uniform Rectangular Magnetic Field

    Hi there, I'm trying to create a sheet that produces a uniform magnetic field,using either rectangular or cylindrical neodymium magnets. I can't tell you much abut their strength, but they would be the common type purchased from a science/hobby shop. Dimensions for cylinder are 10mm dia x...
  45. D

    Uniform Acceleration: Solve for Initial Velocity

    Homework Statement Help please,I have no idea...This is the last question of my hw A boy stands at the edge of a cliff which is 30m above the ground and throws a ball vertically upwards.It hits the ground 3.0s later.Find the initial velocity of the ball. Homework Equations The...
  46. S

    Prove Uniform Convergence of f_n=sin(z/n) to 0

    Homework Statement I need to show that f_{n}=sin(\frac{z}{n}) converges uniformly to 0. Homework Equations So I need to find K(\epsilon) such that \foralln \geq K |sin(\frac{z}{n})|<\epsilon I'm trying to prove this in an annulus: \alpha\leq |z| \leq\beta The Attempt at a Solution I'm having...
  47. H

    Center of Mass of a Triangle (uniform)

    Homework Statement Where exactly is the center of mass of a triangle ? the file attached shows a diagram of a triangle which is equilateral, and the blue spots are the mid-points of each side. Homework Equations a distance = 2/3 from the vertex (along the median) The Attempt...
  48. H

    Moment of Inertia of a uniform triangle(involves integration)

    Homework Statement The attachment shows an equilateral triangle of side length "2d" It is a uniform triangle in the 2-D space. Mass of triangle = M I have to find the moment of inertia about one of its side . I am taking the side \overline{AB} as the axis of rotation (hence i would be...
  49. S

    Paradox of uniform prob. distribution on Z+ vs cardinality, etc.

    There are no actual paradoxes in mathematics (we hope). There are only things that appear to be paradoxes to fallible intuitions. Here is one that bothers me. There can be no translation invariant probability measure on the non-negative integers. Yet it is possible to imagine a general class...
  50. G

    Finding the mass of a sphere with uniform charge density

    Homework Statement The sphere has radius R, and uniform volume charge density P. This sphere remains stationary (levitates) when placed above an infinite sheet of paper with a uniform surface charge density u. What is this sphere's mass? Homework Equations 4/3 pi R^3 is the volume of a sphere...
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