Box Definition and 1000 Threads

A box (plural: boxes) is a type of container or rectangular prism used for the storage or transportation of its contents. The size of a box may vary, from the very smallest (such as a matchbox) to the size of a large appliance, and can be used for a variety of purposes ranging from the functional to the decorative.
Boxes may be made of a variety of typically durable materials, such as wood and metal, though common non-durable materials include corrugated fiberboard and paperboard. Corrugated metal boxes are commonly used as shipping containers. Boxes made of cardboard can be degraded and therefore are not bad for the environment.
Boxes are typically rectangular in shape with a rectangular cross-section, though a box may also have a square, elongated, circular or oval appearance; boxes may also feature sloped or domed top surfaces, or vertical edges, and are not consistently made in a square fashion. Square and rectangular boxes are still much more common than its other various shapes that it could come in.
Boxes may be closed and shut with flaps, doors, or a separate lid. They can be secured shut with adhesives, tapes, or more decorative or elaborately functional mechanisms, such as a catch, clasp or lock.

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  1. L

    Potential Energy (A box attached to a spring which is attached to the ceiling.)

    Hello everyone! To start things off, I apologize if this thread does not go here. Today I had a test on Energy (Potential, Kinetic, Elastic) and we had a question which asked us to find out the value of k for a spring. The question was centered around a box hanging from a ceiling via a spring...
  2. N

    Mathematica Mathematica: minimize black box function

    I have a user-defined function that doesn't seem to work with NMinimum, FindMinimum, or any of the other optimization commands. I think this is due to the fact that the function uses elliptic integrals and matricies to obtain an output. It has multiple variables, but I want to keep them all...
  3. E

    A thought experiment: Light in a mirrored box?

    There is a perfect box with with no gaps or cracks, with mirrors on the interior walls of the box. There is also a light bulb which can emit light but reflects any that goes upon it (with a super two-way mirrored surface, perhaps?). If one switches the lightbulb on, then there is light in the...
  4. L

    The Mystery of Light in a Box: Where Does It Go?

    If you could build a box with a reflective inside that no light could escape. If somehow you put a laser in the box and fired the beam and then shut off the laser what would happen? Would the beam continued to bounce off of the insides of the box or would the beam dissipate somehow? If it does...
  5. D

    Why particle in a box is considered as 1-dimensional ?

    I'm new to the field of quantum mechanics and I have got this basic doubt. The position of the particle in a box is defined by the sine curve. Any position on a sine curve requires 2 coordinates to get the location of the particle having the highest probability at any point of time. But why...
  6. J

    What is the net work done on the box?

    Homework Statement A man picks up a 10kg box, and holds it at a height of 1m above the horizontal ground as he walks to a ramp, and then carries the box up the ramp to a height of 4m, and then down the ramp as shown, finally placing it on the ground at F. Describe the work done at each...
  7. J

    Calculation of neutral Kaon Box Diagrams

    Hi everybody,i'm worried about some calculation. I have to write down the amplitude for the neutral Kaon oscillation. There are two Box diagrams which are depicted here: http://upload.wikimedia.org/wikipedia/de/9/92/FeynmanKaon.png The two diagrams come along with a combinatorical factor of...
  8. R

    Particle in a Box: Calculate Probability at Centre

    Homework Statement A particle is moving in a one dimensional box of infinite height of width 10 Angstroms. Calculate the probability of finding the particle within an interval of 1 Angstrom at the centre of the box, when it is in its state of least energy. Homework Equations \psi...
  9. E

    Static Friction of box on a ramp

    Homework Statement A 100kg box is placed on a ramp. As part of the ramp is raised, the box begins to move downward just as the angle of inclination reaches 15 degrees. What is the coefficient of static friction between the box and the ramp? Homework Equations Fn = mg-Fsin15 The...
  10. T

    Calculating the Volume of a 6-Sided Box

    Homework Statement The diagram shows a box that has six faces .The top and bottom faces are square . THe other faces are all identical. What is the volume of the box ? Homework Equations The Attempt at a Solution
  11. J

    You need to move a 500 N box across the floor. You pull on the box

    You need to move a 500 N box across the floor. You pull on the box with a rope which is also horizontal. The floor is not frictionless. You move the box so that it moves with a constant v of 3m/s by applying a 200 N force. Coefficient of Friction? Also, same question except pull the...
  12. GRB 080319B

    Clear Box Tape Tensile Strength

    Why does clear tape (used to tape up cardboard boxes) become increasingly harder to tear along the axis that it is stretched? It seems that after a certain amount of deformation, it becomes nearly impossible to tear. This seems to be different then just the restoring force (as opposed to...
  13. S

    How can I build a battery box with a switch to toggle between 12v and 24v?

    I have built these before, but have forgotten how I did it. I am making a battery box with four 12v batteries (7.5 Ah each). I will have only one pair of output terminals, one + and one -. Inside will be a switch to toggle between 12 and 24v. I do remember that in the 12v position all batteries...
  14. M

    The Black Box that is counting (ADV MATERIAL)

    So I am taking intro to stats and probability and I am having trouble understanding something that may be quite difficult to explain in counting. Let me start by telling you what i understand The choose function i.e (6 C 2) will take six elements and create a SET of 15 TUPLE's, in which...
  15. J

    What is the maximum force reduction for a 4 m ramp in a warehouse?

    The owner of a warehouse ask an engineer to design a ramp which will reduce the force necessary to lift boxes to the top of a 1/2 m step. If there is only room enough for a 4 m ramp, what is the maximum factor by which the lifting force could be reduced? I am not sure how to find the...
  16. I

    Generate Elliptical Distribution from Box-Muller Transform

    Can i use box muller transform to generate a distribution with two different sigma (i.e. sigma_x and sigma_y)? I want to generate a random gaussian angle (C) relative to z axis on circle plane, then set the angle relative to the x, A and y axis, B, wrt to the original angle. However, I want...
  17. S

    Box Normalizing in Quantum Mechanics: The Role of Black Body Radiation

    What is box normalizing and why is it important in quantum mechanical problems such as the black body radiation?
  18. J

    Problem on my Final. pulling box with rope problem

    Homework Statement A student pulled a box of books weighing 68kg by a rope at an angle of 58 degrees above the horizontal plane of the floor. The floor has a coefficient of kinetic friction of µk=.27. What is the acceleration of the box of books? Homework Equations ∑F = ma Force...
  19. L

    Falling of the box in the accelerationg train

    Homework Statement A cuboid of constant density, height h and length of bottom side=L is in the train. Determine the minimal necessary acceleration (of the train) needed for the cuboid to fall. There is no slipping. (that's all that is stated in the text) Homework Equations not...
  20. M

    Pulling a box up a ramp - Newton's second law

    Homework Statement A box is being pulled up a ramp with a force F. The ramp has a 30 degree incline with the horizontal. write the sum of the forces in the x direction and y direction. Make the x and y coordinate system be parallel and perpendicular with the ramp. The Attempt at a...
  21. M

    Box up a ramp - Work and friction force (easy)

    Homework Statement A 800 N box was pushed up an incline plane of length 4.0m (measured along the incline) to a window ledge 2.0m above ground level. This process required that 3200J of work be done. What was the average frictional force along the plane? Homework Equations W=Fd...
  22. M

    Pushing a box up a ramp a certain distance - work

    Homework Statement A horizontal 25 N pushing force acts on a 10 kg crate moving up a ramp. The ramp is inclined at 37 degrees above the horizontal. How much work is done by this force in moving the crate a distance of 15m along the ramp? Homework Equations W = Fd The Attempt at...
  23. X

    What Compression Level Gives Maximum Velocity to a Sliding Box on a Spring Ramp?

    A 8 kg box slides d = 4.4 m down the frictionless ramp shown in Figure CP10.69, then collides with a spring whose spring constant is 250 N/m. At what compression of the spring does the box have its maximum velocity? i know that .5kx^2+.5mv^2=mg(d+x)sin theta...
  24. S

    Solving the "Black Box" Puzzle with Math Lovers

    Hello, my name is Eugene, i am glad i found a forum for people who love math. I was reading a book on mathematical puzzles recently, and there was one which i couldn't solve, mostly because i am not a very clever guy. Perhaps you will have some ideas? The area of the puzzle is non...
  25. L

    Shrodinger equation/Particle in a box

    1. What is U(x)psin(x) in the interval 0 < x < L? (less than or equal to) 2. In previous problems I had found the following: Second deriv. of psi(x) = -(n*pi/L)2*C*sin(n*pi*x/L) U(x)*psin(x) = 0 3. From the above and the Shrodinger equation, I added U(x) = 0 to the second...
  26. A

    Calculating Force Applied to Box with Friction Coefficient \mu

    Hi guys, I got this thought in my head. If I have a box of mass x, being pulled towards East and the angle \theta, then force applied to the box in order to move it on the surface with friction coefficient \mu has to be in such a way: My question is... wouldn't N be: Or, N...
  27. M

    Perturbation Theory & the Ground State in a 1-D Potential Box

    A particle is in the ground state in a one-dimensional box given by the potential v(x)= 0 for 0<x<a v(x)= inifinity other wise A small perturbation V = V(0)x/a is now introduced. Show, correct to first order in perturbation theory, hat the energy change in the ground state is V(0)/2...
  28. W

    How Can I Connect a 36-Pin Wiring Black Box Without a Diagram?

    I know what this is SUPPOSED to do, but I have no diagram to show me how to hook up the *counts* 36 pins. Image attached. Is there any hope for me, doc?
  29. L

    Range of speeds of particle confined in box

    1. A proton is confined within an atomic nucleus of diameter 3.80 fm. Estimate the smallest range of speeds you might find for a proton in the nucleus. 2. Uncertainty Principle 3. 3.80fm * mv = h/2 Soliving for h, using mass of proton = 1.67*10-27kg, I obtain v = 5.22*107. Then...
  30. C

    How to Display the Score in MATLAB Message Box for Your TV Knowledge

    Homework Statement In the ABC msgbox I would like the variable 'score' to appear after 'Your score was'. How do I do this? Homework Equations %tells the user their overall tv knowledge score=A+B+C; title1='Your TV Knowledge'; if ((A+B+C)<=24)&&((A+B+C)>=18) ABC=msgbox('You are a...
  31. W

    How can I properly wire an 8 way fuse box for use as a power distribution block?

    Hi all, I'm trying to wire an 8 way fuse box for use as a power distribution block, but I'm having trouble with wiring the power properly. See the attachment for the circuit diagram. As you can see, the entire V+ side is tied together. Last year we used a fuse box that already had that...
  32. M

    One-Dimensional Box: Analyzing Butadiene's UV/VIS Spectrum

    Homework Statement consider butadiene H_2 C = CH-CH=cH_2 and assume for simplicity that \pi electrons move on a straight line (one -dimensional box) whose length l can be estimated as equal to two C=C bond lengths (2*1.35 angstrom) , plus one C-C lengths. Butadiene has four \pi...
  33. D

    Magnetic Force of identical shaped box bar magnets

    I am having a problem with my understanding. I could be incorrect, but I think that the magnetic field emitted from a magnet is consistent and doesn't weaken at points further away. Then could someone explain how magnet force weakens with distance. I would also like to know the math so here is a...
  34. Spinnor

    2 electrons in box, hard walls, total energy E.

    2 electrons in box, "hard" walls, total energy E. Say we place 2 electrons inside an empty 1m cubed box with very "hard" walls, the electrons can penetrate only a very small distance into the walls of the box. Let us say that any photons produced by the scattering of the two electrons stay in...
  35. D

    Calc derivatives - Minimum total surface area in a box of V = 160 ft2

    Hi everyone! I'm new to online math forums. I wonder if anyone can give me a hand on this - it would be greatly appreciated. Thank you in advance! Dave Homework Statement If a box with a square base and an open top is to have a volume of 160 cubic feet, find the dimensions of the box having...
  36. E

    Particle in a box with one finite wall and one infinite wall

    Hello all, I came across what I think is a very interesting question the other day; How would you treat a particle trapped in a square well that had one finite wall and one infinite wall? Say for E[SUB]n[SUB]~(n*pi*(h-bar))2/(2m(L+2d)2) would you replace the 2d by 1d? As you can only find the...
  37. W

    Box on Box on Box free body diagram

    Okay, so say that I stack three boxes, one on top of another. There is friction between all surface, including the bottom box and the ground. If I apply a force to the center box only, is there any set of circumstances under which the top box will slip? I know that if the applied force is...
  38. K

    How to Secure PCBs in a Stratospheric Balloon's Electronics Box?

    Hello I'm designing a box for 6 PCBs. It will fly on stratospheric balloon. Do you know a solution of mounting PCBs to box walls, which will provide strong and stable connection? I was thinking about slots in internal walls, but that can be not enough. I found interesting solution...
  39. B

    Is there a black box recorder at the LHC?

    Is there a "black box recorder" at the LHC? To explain the question further: are there real-time records of exactly what's going on and/or voice recorders, analogous to what there are in commercial jets? If there were to be a major catastrophe at the LHC, they would need to know precisely what...
  40. L

    What is the required force to push a box up a slippery ramp?

    Homework Statement A 10 kg box is being pushed up a slippery ramp as shown in Figure 2.1. The coefficient of friction between the box and the ramp is just μ = 0.1. (a) What force does the man need to apply to the box to keep it traveling up the ramp at a steady speed?Homework Equations I have...
  41. S

    Simple Harmonic Motion, platform and box

    Homework Statement A platform moves up and down in SHM, with amplitude 0.035 m. Resting on top of the platform is a block of wood. What is the shortest period of motion for the platform so that the block will remain in constant contact with it? Homework Equations...
  42. R

    Optimization - Volume of a Box

    Homework Statement Ok I know this question is really easy but for some reason I got it wrong. You are given a piece of sheet metal that is twice as long as it is wide and has an area of 800m^2. Find the dimensions of the rectangular box that would contain a maximum volume if it were...
  43. rhody

    How Can You Help Elderly Relatives with Computer Use?

    I am posting this because I am sure there are plenty of other folks out there who have elderly parent's or relative's who want to use a PC, and are not all that savvy with them. When they run into problems, getting competent help can be expensive, and time consuming, not to mention...
  44. K

    What Determines the Loss of Contact in a Mass-Spring System?

    Homework Statement A small mass m is in a box of mass M that is attached to a vertical spring of stiffness constant k. When displaced from its equilibrium position y0 to y1 and released, it executes simple harmonic motion. Calculate the reaction between m and M as a function of time. Does the...
  45. E

    Maximum Compression and Speed of a Spring-Box Collision

    Homework Statement A 16.0kg box slides 4.0m down the frictionless ramp shown in the figure, then collides with a spring whose spring constant is 240N/m. Figure Attached It is a two part question, I got neither and don't understand why. a)What is the maximum compression of the...
  46. P

    Stress at c'sink holes of enclosed box with internal pressure

    I have an issue I'm not quite sure how to approach. A customer is requesting that we prove that our battery pack chassis will not burst or deform if additional gases are introduced inside the enclosed box (the batteries could vent). The chassis is assumed to be a sealed .05" thick 5052 AL...
  47. T

    Maximize volume of a rectangular box

    Homework Statement Find the volume of the largest rectangular box in the first octant with three faces in the coordinate planes and one vertex in the plane x + y + 4z = 4 Homework Equations Volume of a box with L being the length of a diagonal in that box = L3/(3sqrt3) Shortest...
  48. G

    A box falls one metre and hits a womans head

    I need some scientific assistance. A woman at work had the misfortune of a box falling and hitting her head. Fortunately she was fine, the box was not heavy and she had no injuries. Two years later i have a solicitors letter demanding money for fictitious injuries. Is it possible to get an...
  49. J

    Child dragging box (friction, net force and work)

    Homework Statement A child drags a 20kg box across a lawn for 10m anfd along a sidewalk for 30m; the coefficient of friction is 0.25 for the first part of the trip and 0.55 for the second part. If the child always pulls horizontally, how much work does the child do on the box...
  50. K

    Calculating energy for particle in finite box.

    [solved] Calculating energy for particle in finite box. Homework Statement I am going to look at a particle in a finite boxpotential where V(x)=-V0 for -a<x=<a And they are bound, in other words -V0<E<0. This is a transcendtale equation that need to be solved graphicly/numericly. I am aware...
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