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Ruchi.

  • 2 years ago

how to find dimension of any physical quantity?

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  1. Ruchi.
    • 2 years ago
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    @mukushla @mathslover @shruti @SUROJ @ashna @Preetha @PaxPolaris

  2. SUROJ
    • 2 years ago
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    I guess there are 3 dimension lenght, bredth and height

  3. SUROJ
    • 2 years ago
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    and if you consider forth time dimension

  4. ashna
    • 2 years ago
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    In the SI system, the dimension of all physical quantities is a combination of the 7 fundamental quantities such as ..

  5. ashna
    • 2 years ago
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    Name Unit Symbol Distance Meter L Mass Kilogram M Time Second T Current Ampere I Light Candela J Heat Kelvin K Concentration Mole N

  6. mathslover
    • 2 years ago
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    Ok so there are two types of units: 1) Basic (given above by ashna) 2) Derived for example: speed = distance /time unit of distance = metre and unit of time = second hence unit of speed = m/s

  7. mathslover
    • 2 years ago
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    reprsentation : [SPEED] = \(\large{[LT^{-1}]}\)

  8. mathslover
    • 2 years ago
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    is this what u wanted @Ruchi. ?

  9. ashna
    • 2 years ago
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    @Ruchi. candela sybol is cd sorry !

  10. mathslover
    • 2 years ago
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    right J is the symbol of Joule ( unit of energy )

  11. ashna
    • 2 years ago
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    Any physical quantity Q can then be dimensionally expressed as [Q] = L^1 M^2 T^3

  12. ashna
    • 2 years ago
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    THE ONE WHICH SEEMS TO BE POWERS IN MATH IS CALLED DIMENSIONS IN PHYSICS

  13. ashna
    • 2 years ago
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    P.S though not every where

  14. ashna
    • 2 years ago
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    do you have any books to refer to ?

  15. Ruchi.
    • 2 years ago
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    @mathslover i don't know how to find dimension of any physical quantity.

  16. mathslover
    • 2 years ago
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    Of any physical quantity :? you mean like find the dimensions of velocity , speed etc.?

  17. ashna
    • 2 years ago
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    Area = length * length = L^2 UNDERSTOOD ? @Ruchi.

  18. Ruchi.
    • 2 years ago
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    any i mean plz tell me that hw can we find dimension of any quantity.

  19. Ruchi.
    • 2 years ago
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    okay

  20. ashna
    • 2 years ago
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    Volume = Length * area = Length * Length * Length = L^3

  21. ashna
    • 2 years ago
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    understood that ?

  22. Ruchi.
    • 2 years ago
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    yes

  23. ashna
    • 2 years ago
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    do you intent someone else to explain , or am i to continue ?

  24. Ruchi.
    • 2 years ago
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    plz continue

  25. ashna
    • 2 years ago
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    okay

  26. ashna
    • 2 years ago
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    Angle = Arc / Radius = no dimensions

  27. ashna
    • 2 years ago
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    you know why ?

  28. Ruchi.
    • 2 years ago
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    why?

  29. ashna
    • 2 years ago
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    arc = L radius = L so both gets cancelled

  30. ashna
    • 2 years ago
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    understood ?

  31. Ruchi.
    • 2 years ago
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    ok

  32. ashna
    • 2 years ago
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    Density = Mass / Volume = M / L^3 = M^1 L^-3

  33. ashna
    • 2 years ago
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    |dw:1344583056345:dw|

  34. ashna
    • 2 years ago
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    OKAY ?

  35. Ruchi.
    • 2 years ago
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    ok

  36. ashna
    • 2 years ago
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    velocity = displacemnt / time = LT^-1

  37. ashna
    • 2 years ago
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    SINCE DISPLACEMENT = DISTANCE = L

  38. Ruchi.
    • 2 years ago
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    how? i hav nt under stood it

  39. ashna
    • 2 years ago
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    okay , displacement = distance = L (length) divided by time (t)

  40. ashna
    • 2 years ago
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    |dw:1344583266349:dw|

  41. ashna
    • 2 years ago
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    now okay ?

  42. ashna
    • 2 years ago
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    you are free to say if you didn't understand it still :)

  43. Ruchi.
    • 2 years ago
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    can i ask u 1 thing

  44. ashna
    • 2 years ago
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    sure :)

  45. Ruchi.
    • 2 years ago
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    okay why u have taken distance=L

  46. ashna
    • 2 years ago
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    distance is nothing but length .

  47. ashna
    • 2 years ago
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    distance travelled , is the length travelled understood ?

  48. Ruchi.
    • 2 years ago
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    yes

  49. ashna
    • 2 years ago
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    where displacement is just the other word for distance , displacement is the shortest dist travelled and distance is the longest possible distance = L (length)

  50. ashna
    • 2 years ago
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    can i proceed ?

  51. Ruchi.
    • 2 years ago
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    okay above u hav posted a table i table i hav find out that table i many bookbt i don't know how and where i hav to use that table.:"(

  52. ashna
    • 2 years ago
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    Name Unit Symbol Distance Meter L Mass Kilogram M Time Second T Current Ampere I Light Candela cd Heat Kelvin K Concentration Mole mol

  53. ashna
    • 2 years ago
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    this is nothing , i'll explain , dont worry yourself now :)

  54. Ruchi.
    • 2 years ago
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    okay

  55. ashna
    • 2 years ago
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    now i said distance = L , that is the first one , okay ? and its unit is meter .

  56. ashna
    • 2 years ago
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    anything you want to know ?

  57. ashna
    • 2 years ago
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    @Ruchi. you there ?

  58. Joseph91
    • 2 years ago
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    Dimension of a body is determined by the co-ordinate axis attach to it. There are 1D, 2D, 3D and 4D(It includes Time).The existence of 4D is beyond our imagination.

  59. Ruchi.
    • 2 years ago
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    @ashna

  60. Ruchi.
    • 2 years ago
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    @ashna hav studied chapter work energy &power

  61. ashna
    • 2 years ago
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    hey ruchi .. tell me a time when you can stay on in open study for like hours .. not mins , i'll help you with dimensions then ;)

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