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. L

    Equations with multiple solutions

    Given the equation (x+4)(2-x)=x+4 How come it's wrong to divide both sides by x+4? Should it not give the same solution as multiplying out the left side and solving the quadratic equation?
  2. T

    Engineering Circuit Analysis (Equation) with Multiple Voltage Sources

    Homework Statement Derive the differential equation that relates the voltage (V) to the current (I) entering the circuit. Homework Equations Let: ic = C dV/dt = current traveling through the capacitor (C) ik = (V+Ek) / Rk = current traveling through the potassium (K) channel iNa = (V-ENa) /...
  3. X

    Unit vectors for multiple particles? (Quantum Mechanics)

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  4. A

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  5. Aner

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    Homework Statement Hi, I have a problem with the following exercise. Let C={(x,y,z)∈ℝ3 : x2+y2+z2≤1, z≥√(3x2+8y2)} be a subset of ℝ3. Calculate ∫∫∫C z dxdydz.Homework Equations Spherical coordinates, given by x=ρsinΦcosθ, y=ρsinΦsinθ, z=ρcosΦ, and cylindrical coordinates which are x=ρcosα...
  6. STEMucator

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  7. J

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  8. C

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  9. JasonHathaway

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  10. Albert1

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  11. Kerrigoth

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  12. R

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  13. A

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  14. cpscdave

    Postioning of multiple Omidirectional antenna's (900mhz)

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  15. gracy

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  16. tomdodd4598

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  17. M

    Study Tips (For multiple conditions) -- Mech Engineer Studies

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  18. Albert1

    MHB Prove Multiples of 2003 are Divisible by 2003

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  19. P

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  20. C

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  21. A

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  22. R

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  23. R

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  24. P

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  25. C

    MHB Solving 7x=210: Must x be a Multiple of 12?

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  26. Erwin

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  27. trytodoit

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  28. A

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  29. kostoglotov

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  30. kostoglotov

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  31. B

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  32. matqkks

    MHB How Can Real-Life Scenarios Help Understand the Lowest Common Multiple?

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  33. matqkks

    How Can LCM Explain Planetary Alignments and Spacecraft Timing?

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  34. S

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  35. A

    Mass dependent multiple scattering

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  36. anemone

    MHB What Is the Smallest Multiple of 2013 That Solves This System of Equations?

    Find the least multiple $k$ of $2013$ for which the system of equations $(a^2+b^2)(b^2+c^2)(c^2+a^2)=a^6+b^6+c^6+4k^2$ $abc=k$ has a solution.
  37. T

    Find the zeroes of r. What to do when it is a multiple of theta?

    I understand what to do when theta is by itself such as r=5+10cos(theta) but what if you have the same equation, and it is (2theta) I am on taptalk by the way.
  38. S

    Multiple distributed loads on a beam

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  39. Dostetres

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  40. gracy

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  41. M

    Randomized Complete Block Design - Scheffe Multiple Comparison

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  42. Roynish

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  43. B

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  44. E

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    I am setting up a hydraulic system on a cable laying machine. We don't have much space for the tank, and I am thinking of constructing it on the "wall" og a big 1m^3 stainless steel sand holder. That would make the tank With 5 faces in open air, 1 face With sand on the opposite side. I am...
  45. TheExibo

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  46. E

    Solar across multiple roofs

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  47. R

    Pump water from multiple tanks under vacuum by common pump?

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  48. L

    Crazy multiple choice question

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  49. Y

    Multiple flowmeters read through mic port of an Android device

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  50. L

    Uncertainty For Multiple Measurements

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