anonymous
  • anonymous
how to find dimension of any physical quantity?
Physics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
@mukushla @mathslover @shruti @SUROJ @ashna @Preetha @PaxPolaris
anonymous
  • anonymous
I guess there are 3 dimension lenght, bredth and height
anonymous
  • anonymous
and if you consider forth time dimension

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anonymous
  • anonymous
In the SI system, the dimension of all physical quantities is a combination of the 7 fundamental quantities such as ..
anonymous
  • anonymous
Name Unit Symbol Distance Meter L Mass Kilogram M Time Second T Current Ampere I Light Candela J Heat Kelvin K Concentration Mole N
mathslover
  • mathslover
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
mathslover
  • mathslover
reprsentation : [SPEED] = \(\large{[LT^{-1}]}\)
mathslover
  • mathslover
is this what u wanted @Ruchi. ?
anonymous
  • anonymous
@Ruchi. candela sybol is cd sorry !
mathslover
  • mathslover
right J is the symbol of Joule ( unit of energy )
anonymous
  • anonymous
Any physical quantity Q can then be dimensionally expressed as [Q] = L^1 M^2 T^3
anonymous
  • anonymous
THE ONE WHICH SEEMS TO BE POWERS IN MATH IS CALLED DIMENSIONS IN PHYSICS
anonymous
  • anonymous
P.S though not every where
anonymous
  • anonymous
do you have any books to refer to ?
anonymous
  • anonymous
@mathslover i don't know how to find dimension of any physical quantity.
mathslover
  • mathslover
Of any physical quantity :? you mean like find the dimensions of velocity , speed etc.?
anonymous
  • anonymous
Area = length * length = L^2 UNDERSTOOD ? @Ruchi.
anonymous
  • anonymous
any i mean plz tell me that hw can we find dimension of any quantity.
anonymous
  • anonymous
okay
anonymous
  • anonymous
Volume = Length * area = Length * Length * Length = L^3
anonymous
  • anonymous
understood that ?
anonymous
  • anonymous
yes
anonymous
  • anonymous
do you intent someone else to explain , or am i to continue ?
anonymous
  • anonymous
plz continue
anonymous
  • anonymous
okay
anonymous
  • anonymous
Angle = Arc / Radius = no dimensions
anonymous
  • anonymous
you know why ?
anonymous
  • anonymous
why?
anonymous
  • anonymous
arc = L radius = L so both gets cancelled
anonymous
  • anonymous
understood ?
anonymous
  • anonymous
ok
anonymous
  • anonymous
Density = Mass / Volume = M / L^3 = M^1 L^-3
anonymous
  • anonymous
|dw:1344583056345:dw|
anonymous
  • anonymous
OKAY ?
anonymous
  • anonymous
ok
anonymous
  • anonymous
velocity = displacemnt / time = LT^-1
anonymous
  • anonymous
SINCE DISPLACEMENT = DISTANCE = L
anonymous
  • anonymous
how? i hav nt under stood it
anonymous
  • anonymous
okay , displacement = distance = L (length) divided by time (t)
anonymous
  • anonymous
|dw:1344583266349:dw|
anonymous
  • anonymous
now okay ?
anonymous
  • anonymous
you are free to say if you didn't understand it still :)
anonymous
  • anonymous
can i ask u 1 thing
anonymous
  • anonymous
sure :)
anonymous
  • anonymous
okay why u have taken distance=L
anonymous
  • anonymous
distance is nothing but length .
anonymous
  • anonymous
distance travelled , is the length travelled understood ?
anonymous
  • anonymous
yes
anonymous
  • anonymous
where displacement is just the other word for distance , displacement is the shortest dist travelled and distance is the longest possible distance = L (length)
anonymous
  • anonymous
can i proceed ?
anonymous
  • anonymous
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.:"(
anonymous
  • anonymous
Name Unit Symbol Distance Meter L Mass Kilogram M Time Second T Current Ampere I Light Candela cd Heat Kelvin K Concentration Mole mol
anonymous
  • anonymous
this is nothing , i'll explain , dont worry yourself now :)
anonymous
  • anonymous
okay
anonymous
  • anonymous
now i said distance = L , that is the first one , okay ? and its unit is meter .
anonymous
  • anonymous
anything you want to know ?
anonymous
  • anonymous
@Ruchi. you there ?
anonymous
  • anonymous
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.
anonymous
  • anonymous
@ashna
anonymous
  • anonymous
@ashna hav studied chapter work energy &power
anonymous
  • anonymous
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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