What is Multiple: Definition and 1000 Discussions

A multiple-unit train or simply multiple unit (MU) is a self-propelled train composed of one or more carriages joined together, which when coupled to another multiple unit can be controlled by a single driver, with multiple-unit train control.
Although multiple units consist of several carriages, single self-propelled carriages - also called railcars, rail motor coaches or railbuses - are in fact multiple-units when two or more of them are working connected through multiple-unit train control (regardless if passengers can walk between the units or not).
The term multiple unit does not denote locomotives using multiple-unit train control.

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  1. FallenApple

    Is there such a thing as multiple simulation?

    We know that a computer can simulate phenomena. Is it possible to simulate the same phenomena partially on different computers simultaneously? For example, Computer 1 simulates the front of a statue. Computer 2 simulates the back of a statue. Computer 3 simulates the birds eye view of a statue...
  2. G

    Confusion with multiple impulses

    Suppose I have a body of mass M kept on a horizontal smooth surface. I strike that particle with some force ,providing an impulse J_1. The applied force is in vertically downward direction. Suppose that the body deforms in this process and it doesn't rebound. What I want to know is, whether the...
  3. unseeingdog

    Multiple rotors on a wind turbine

    Could multiple, smaller rotors on a wind turbine (on the same shaft) be more effective than a single, larger rotor? Why do most wind turbines have only one big rotor? I was thinking about doing a science fair project on this topic, but I have been unable to find a conclusive answer to this...
  4. A

    Turning Multiple Fixed Axle Trailers

    I am an apple grower and want to build trailers to haul apples (in bins) through my orchard. I want to couple 5 - 10 foot X 40 inch wide trailers (in tandem) and tow them through the orchard. The rear axel on each trailer is fixed and the trailer connects to the trailer in front of it (on a...
  5. arkaddas

    AC Mains Distribution energized from multiple AC voltage sources

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  6. T

    Center of Mass Velocity in Multiple Dimmensions

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  7. M

    How does one dimensional light warp multiple dimensions?

    If light is one dimensional, yet has gravity, and gravity is the warpage of spacetime, and spacetime has four dimensions, then how does a one dimensional wave/particle warp multiple dimensions?
  8. M

    B Examples of multiple entanglements

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  9. C

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  10. B

    A Statistical analysis for comparing trends among multiple variables

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  11. pairofstrings

    B A single or multiple equations of 'y'?

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  12. Chatterton

    Imagining Multiple Ringworlds Around a Star - Is it Possible?

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  13. M

    I Calculating area of multiple connected circles

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  14. rkatcosmos

    Using multiple mirrors in Michelson Interferometer

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  15. D

    Multiple reflections and transmissions of light inside a cube

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  16. E

    What is the composite power of multiple RF signals?

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  17. Mzzed

    Integration of multiple exponentials

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  18. Telemachus

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  19. harpazo

    MHB Change of Variables in Multiple Integrals

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  20. MexChemE

    Modeling a multiple inlet piping system

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  21. H

    Multiple in logarithm question -- find the variable?

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  22. A

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  23. A

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  24. T

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  25. kupid

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  26. R

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  27. B

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  28. R

    I What other math courses involve multiple integrals?

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  29. S

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  30. M

    I Panel study, multiple linear regression, assumptions

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  31. ThunderLight

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  32. M

    B One Equation for multiple random curves?

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  33. L

    MHB Multiple arrays: Key and value.

    Hello, I am stuck on this question.The bold part is where I am stuck. I was able to get at least 2 out of the 3 test outputs but I can't seem to get the last one. I tired taking out the dividing by 2 but then the first test output doesn't work. Thank you. Question: For any element in keysList...
  34. Kaura

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  35. kolleamm

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    Homework Statement 2^(t-1) * 6^(t-2) = 20,000 Homework EquationsThe Attempt at a Solution I have no idea how to solve this, although I do understand the basics of logarithms
  36. N

    Create Home Brew Bottle Capper: 6 at a Time

    So I've been working on a home project of creating a movable, self contained, ergonomic beer small (3-6 GA) home brew kit. I'd like to be able to fill and cap 6 bottles at one time. I'm working on a prototype for the filling process but need some ideas for how I could apply 6 caps to six bottles...
  37. Vishakha

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  38. BiGyElLoWhAt

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  39. tarkin

    Electric Field due to multiple point charges

    Homework Statement [/B] Derive expressions for the magnitude and direction of the electric field at point P and the potential at R. Charges Q1 and Q2 are both positive. Distance from Q1 to P is h, distance from Q2 to P is √2 h Homework Equations E = k q/r^2 The Attempt at a Solution I...
  40. donaldparida

    IUPAC nomenclature for many multiple bonds

    My previous Chemistry teacher while teaching IUPAC nomenclature said that the double bond is always given greater priority over the triple bond and the numbering of the carbon atom chain is done in such a way that the double bond gets the lowest possible number while my present Chemistry teacher...
  41. ATY

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  42. A

    I Lorentz violation, multiple preferred frames, vacuum energy

    Hi all - hope I'm not beating a dead horse here, but I'm following up on at least two other threads (made sense to consolidate): There are theories of quantum gravity (or the Standard Model Extension) that allow for local Lorentz violation. So, my first question: is there any reason why there...
  43. I

    Confused about derivation of E=(V-IR)/L, multiple choice problem

    Homework Statement A vacuum photodiode detector utilizes the photoelectric effect to detect light. The photoelectric effect causes electrons to be ejected from a metal plate when photons of light are absorbed by the metal. The energy of a photon is given by the equation E = hf, where h = 6.6 x...
  44. V

    MHB How can the sum of digits of a multiple of 2016 equal 2016?

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  45. S

    Why multiple turbines drive a single generator

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  46. pittsburghjoe

    I Criss-cross multiple double slit experiment paths?

    Has someone attempted to criss-cross multiple double slit experiment paths? The purpose would be to mix paths of observed and free particles. I want to know if clumps and fringes appear everywhere or we would get something new.
  47. JoeStrout

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    I've written a space colony simulation game called High Frontier. It correctly simulates rotational stability when most of the mass is dominated by a single large spinning part. For example, a squat cylinder will be stable, but a long cylinder will end up tumbling end over end, as shown...
  48. Hughng

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  49. D

    Cause of multiple paths of electrical breakdown?

    When a voltage gradient across a dielectric becomes too large, the material will break down and become conductive, mostly because of plasma ionization. Thus we get lighning, static electricity fingertip shocks, and tesla coil shows. But often during such breakdowns, there are multiple...
  50. V

    B Compute Angle Between Multiple 3d Vectors

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