What is Box: Definition and 1000 Discussions

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. aspodkfpo

    Where does the force of tension act on a box?

    Given a force of tension with a string attached to the front of the box, do we take the force as acting with an angle to the centre of the mass of phi or theta? Explain please?
  2. aspodkfpo

    Trolley with a box sitting on top

    If I have a trolley and an object on top traveling at constant speed, the force on the object in the horizontal direction must be zero. In this case do we count there being no frictional force, or is it because the kinetic friction backwards and the static friction forwards sums up to zero? Is...
  3. G

    Question about whether UV light can penetrate a cardboard box

    Does cardboard absorb or reflect UV from indirect sunlight? does it go through the cardboard and hit the plastic and rubber items inside the shoe box with UV?
  4. jamesdhurai

    Lifting height of a box in a truck going over a speed bump

    hey guys need to know the way to find the solution to the problem. Consider a truck which is traveled in a speed of 60km per hour. A package weighs 50 kg is placed inside the truck with side supports to arrest the movement in x and y direction. But the top movement (z axis) is not arrested...
  5. tanaygupta2000

    How Do Energy Levels Work for Electrons in a 1D Box?

    For the given problem, I know that the quantized energy for the particles in a 1D box is given by - E(n) = n^2 h^2/ (8mL^2) Here m = mass of electron L = Length of the box = a Now, since there are 8 electrons, but only 2 can occupy one energy level, so I used n^2 = (1)^2 + (2)^2 = 1 + 4 = 5...
  6. tanaygupta2000

    Calculate E Min: n=1, L=2a, ψ=2 - Help!

    For calculating minimum E, I have n = 1, L = 2a & ψ = 2. But I am not getting how to exactly find its value. Please help me !
  7. aspodkfpo

    AP Physics C sample question that I think is wrong (dart hitting a box)

    https://apcentral.collegeboard.org/pdf/ap-2020exam-sample-questions-physics-c-mechanics.pdf For 1 b) how did they get that equation? Is it wrong?
  8. D

    Kinematics and vectors -- A heavy box is being pulled using two tractors....

    I solved it using parallelogram law if vector addition but didn't got the correct answer.why? Is their any other way to add velocity vectors. How to do this problem
  9. ilper

    B Understanding Photon in a Box: Eigenmodes, Reflection, and Energy Measurement

    The eigen wavelengths λn(WL) of EM radiation in box are 2d/n where d is the size of the box. If I put a photon in a box with WL>2d via an optic cable trough a hole it must reflect on the perfect mirror walls and be a running wave. Maybe it is possible to decompose it as a set of eigenmodes of...
  10. A

    I Probability of finding a particle in a 1-D box max. at centre?

    From the probability density plot why it is max at the centre of the box...e.g probability to find the particle per unit le gth is max. at the centre of the box??why not at any other position??
  11. U

    Efficiency and Energy to move a box on a conveyor belt

  12. A

    MHB Find the volume of the hexagonal-shaped plastic box

    A chocolate company produces triangular chocolate bars. The length of the chocolate bar is x cm, and its cross section is an isosceles triangle. The length of the base side of the cross section is 3 cm, the height is h cm, and the two base angles are 50 degrees. Moreover, the company uses a...
  13. jonnyjonny

    Solve Box Tipping Problem: μk=0.2, Weight=50kg

    I would like to know the considerations needed to find the tipping of a box. It is given μk=0.2 and the box is 50kg There are actually 2 ways of solving the problem: 1. To consider the moment about the centre of mass of the box, given that the normal force on the box will be redistributed...
  14. U

    I Quantum Mechanics Particle in a Box

    I need help .I did not A) E < V0 for T =? (passing coefficient ) B) E = V0 for T = ? C ) E > V0 for T =? A
  15. G

    How to think about entropy microstates/macrostates for a gas in a box

    I'm trying to relate an analogy from Brian Greene about entropy microstates/macrostates to the real world. In the analogy, you have 100 coins that you flip. The microstate is which particular coins landed heads up. The macrostate is the total number of coins that are heads up. So a low entropy...
  16. rakailee

    Box on a slanted plank with friction attached to a spring

    I first find the force of friction to be (2)(9.8)cos(65)(.22), then I find the pull of gravity to be (2)(9.8)sin(65). The full equation I set up to be: 0 = kx + force of friction minus the pull of gravity This gives me the wrong answer, 0.44 . My free-body diagram is that kx and force of...
  17. tanaygupta2000

    Statistical Mechanics: Four non-interacting particles are confined in a box

    Regarding the first part, I proceeded as: nx ny nz 4 0 0 => E1 = 16C 0 4 0 => E2 = 16C 0 0 4 => E3 = 16C 3 1 0 => E4 = 10C 3 0 1 => E5 = 10C 0 3 1 => E6 = 10C 1 3 0 => E7 = 10C 0 1 3 => E8 = 10C 1...
  18. studentgrade12

    Using a rope to pull a box across a floor (problem with friction)

    I have been trying a couple of problems with forces and i am not getting the answer, I don't understand what i am doing wrong. Can someone please guide me through this question
  19. Spinnor

    I Bohm guiding field, electrons in a semiconductor "box"

    Consider the light sensor in a modern camera. Light can give energy to electrons and populate the numerous "boxes" of our light sensor with extra electrons. Those boxes will temporally store the electrons till they are counted. I would like to understand this process with my "Bohmian" glasses...
  20. john1875h

    What motor/gear box is needed to lift 160lb robot?

  21. J

    Canonical ensemble and Force on the Walls of a box

    Hi everyone, this is my first message after presentation so please be merciful if the notation is somewhat messy. Here's my attempt at a solution: As for points 1) and 2) I used the definition of partition function $$Z = \frac{1}{h^{3N}} \int e^{-\beta \mathcal{H}} d^3p d^3q$$ and the fact that...
  22. Heyxyz

    How Long Does a Box Stay In Contact With a Spring as it Bounces Off of it?

    T = 2π * √(2/300), T = .513 seconds. If I divide it by 4/3, I get a final answer of .385 seconds of touch. I know the box isn't attached for the entire oscillation, so T has to be divided. To me, it makes sense to divide it by 4/3 (when the box falls, the spring is compressed, hits...
  23. M

    Moving a box on an inclined plane. Find F(min), angle and W(min)

    Hi, this is my try: I would appreciate any confirmation or correction . -- Thanks
  24. RyanRhino

    Calculate the average force used to drag a box up a ramp

    I first wrote down that 55% = Eout/Ein I also know that W = (Facos20)(4) and I substitute it into the first equation 55% = Eout/[(Facos20)(4)] But I'm missing two variables here. Did i forget something or is the question missing some information?
  25. Boltzman Oscillation

    Solving Schrodinger's Equation for a Particle in an Infinite Box

    Firstly, since there is no condition for the z axis in the definition of the potential can I assume that V(x,y,z) = .5mw^2z^2 when 0<x<a, 0<y<a AND -inf<z<inf? If so then drawing the potential I can see that the particle is trapped within a box with infinite height (if z is the...
  26. Nisarg_p

    Hot Box Apparatus: Guarded Method vs Direct Heating

    I have read about many hot box apparatus made by guarded hot box method. My question is why do people do not make one where the hot side consists of a heated metal plate directly in contact with the material to be tested. For those who do not know about what a hot box apparatus is - It is a box...
  27. A

    Box and a Spring on on an inclined plane

    Homework Statement: A box of mass M=30 kg sits on a ramp which is tilted at angle 13 degrees. The coefficients of static and kinetic friction between the box and the ramp are both 0.12. The box is connected to a spring of spring constant k=9 Newtons per meter. Initially, the box is held in...
  28. Amblambert

    Chemistry Quantum Chemistry - Particle in a box

    Here is my attempt at a solution. The thing I am not sure about is the final result of the Shrodinger equation and the n-values that are offered? Did I make a math mistake? Thank you so much for reading through this!
  29. U

    I Box System Probability Problem

    Good morning, I have a system that consists of a huge number of boxes, it is not important to know how many, each containing a binary number: In every cell, the probability that there is a '1' is p, so the probability that there is a '0' is equal to (1-p). What I do is take them in groups of N...
  30. Arman777

    Python What is the Position of Two Colliding Balls in a 2D Box after 10 Seconds?

    We have a 2D box (billiard table) which have size of Width = 600 and Height = 300. We have two identical ball a radius of 20. Also the balls decelerate with a rate of 5 m/s^2. The problem is to find the position of the ball after 10 second. ( The balls may have collide) from math import...
  31. tjholi

    Derivation of the Emptying Time for a buoyant box to drain

    Problem Statement: I am having trouble deriving the expression from the initial equations. (Calculate the emptying time considering Volume conservation) Relevant Equations: Q=A*sqrt(b(H-h(t)) And we have dh/dt =Q/S (conservation equation) and we have to obtain h/H = 1-(1-t/te)^2 with te=...
  32. 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...
  33. A

    Newton's Laws — Pushing a box horizontally on a surface

    unsure what process to tackle it.
  34. Ignitia

    What To Do With A Box of 'Essential Oils'?

    My friend gave me a box of essential oils. It seems pretty wasteful to throw them out (and it's a gift), but I have no idea what to do with them. Scented soaps or perfumes would be a fun project, but I don't have the other ingredients to do that. So, I'm taking suggestions. (And what do I do...
  35. M

    B Measuring Fictitious Forces in a Closed Box

    I was reading the following article: https://en.wikipedia.org/wiki/Fictitious_force When I came across this passage: "This led Albert Einstein to wonder whether gravity was a fictitious force as well. He noted that a freefalling observer in a closed box would not be able to detect the force of...
  36. T

    What is the minimum force required to move the box?

    Problem Statement: What is the minim Force F necessary to make the crate start moving up the incline? Relevant Equations: F_push=mgsin(ø)+F_f F_f= µ_s mgcos(ø) My values m = 80kg ø = 20 Fø = 15 static friction = 0,5 constant friction = 0,4 F _push = 80kg * 9.8 m/s^2 *sin(20) + 0,5 * 80kg *...
  37. H

    I Calculate the number of states for a particle in a box

    The multiplicity of states for a particle in a box is proportional to the product of the volume of the box and the surface area of momentum space. $$ \Omega = V_{volume}V_{momentum}$$ The surface area in momentum space is given by the equation: $$p^{2}_{x}+ {p}^{2}_{y}+{p}^{2}_{z} =...
  38. Futurestar33

    Shelf in a box, treating the shelf as a weak perturbation

    In this problem I am supposed to treat the shelf as a weak perturbation. However it doesn't give us what the perturbed state H' is. At the step V(x) = Vo, but that is all that is given and isn't needed to determine H'. This isn't in a weak magnetic field so I wouldn't you use H'=qEx and then...
  39. didaw

    Calculate the force on the side of this water storage box

    Area = 1 x 0.5= 0.5 1st moment of area = 0.5 x (0.5/2) = 0.125 m total force = p x g x 1 moment = 1000 x 9.81 x 0.125 = 1226.25N Force = 1226.25 im pretty sure all that is right i think the second moment = Ix = bh^3 / 3 = 1 x 0.5^3 / 3 = 0.0416 then 2nd moment of area / 1st moment of area...
  40. D

    3D Statics problem: Box on an inclined plane constrained by a rope

    Hello Got a following problem. 300N Box on a frictionless inclined plane. The plane itself is in the Z-direction. Box is held by a rope AB and a force in the direction Z. Determine the tension in the rope and the force F. The answers to this problem are 104N and 215NMy question is where do i...
  41. S

    Automatic Lid Opener for a Lifting Box

    Please find the attached drawing showing detail of my requirement. I need to lift a box on a wood table, which opens its lid while its lifted. I am able to make the box lifts upwards. Now my requirement is to get a proper solution to smoothly open the lid whole the box is lifted. The lifting...
  42. Zeynaz

    How Does Particle in a Box Relate to Quantum Mechanics?

    I am having difficulties understanding this concept. Particle in a box (as far as i understood) shows that the electrons or particles need a certain about of potential energy to escape the one-dimentional potential well. I think its pretty similar to the concept of the electons and ionising...
  43. M

    Open CT Dialog Box in Simulink | Mathworks

    I'm reading this Document : https://www.mathworks.com/help/physmod/sps/examples/current-transformer-saturation.html#d117e16073 In this document, it said : "Open the CT dialog box and observe how the CT parameters are specified" How to open CT dialog box in simulink ? Thanks for your help
  44. J

    A Classical particle in a 2D box

    I am trying to understand ergodic theory, i.e. how simple systems reach equilibrium. I consider a classical particle in a 2D (or 3D) box. Funnily, I have never seen this example in books (probably due to lack of knowledge). Instead, in QM, the particle in a box is a prototypical example. My...
  45. F

    I Particle in a box experiment confirmation

    Is there any experiments that validate the results of particle in a box with infinite or finite potential. Thanks
  46. S

    Solving Particle Motion in a Rigid Box: t=0

    I have question, how can I solve problem of particle in rigid box when one of the wall gets completely destroyed? At time t = 0 the right wall of box gets completely destroyed, left wall is still here( ψ(0) = 0 ), also at t = 0 we know that particle is in ground state. How can I search for...
  47. M

    Thermodynamics: Insulated Box Partition Question

    Homework Statement A thermally insulated, rigid vessel is divided into two equal compartments. One contains steam at 100 bar and 400 degrees Celcius, and the other is evacuated. The partition is removed. Calculate the resulting pressure and temperature. (Please let me know if this is the wrong...
  48. M

    Thermodynamics of an Insulated Box: Water-Steam Question

    Homework Statement A sealed, thermally insulated tank of volume 2 m^3 has a safe working pressure of 4 bar. At 20 degrees Celcius, 10% of the volume is occupied by water, the remainder by water vapour. Calculate how much heat can be added without exceeding the safe working pressure. This...
  49. M

    Need to calculate work -- Lifting and then sliding a box....

    Homework Statement To lift a box it needs 250N force (F). How much work (A) has to be done to lift it at height (h) 1.2m and to slide it horizontaly (l) 1.2m. Coefficient of friction is 0.2 (μ) F = 250N h = 1.2m l = 1.2m μ = 0.2 A = ? on both situations 2. Homework Equations A = F * h A = F *...
  50. Alan Ezra

    I Particle in a box and quantization of energy

    Greetings, In the scenario of a particle in an infinite potential well, there are discrete energy levels, i.e.##E=\hbar ^2 n^2 \pi ^2/ (2 m L^2)## where L is the width of the potential well, and n takes on positive integers. But what will happen if I put a particle of energy ##E_i## that is not...
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