Question

how to find dimension of any physical quantity?

Answer 1

@mukushla @mathslover @shruti @SUROJ @ashna @Preetha @PaxPolaris

Answer 2

I guess there are 3 dimension lenght, bredth and height

Answer 3

and if you consider forth time dimension

Answer 4

In the SI system, the dimension of all physical quantities is a combination of the 7 fundamental quantities such as ..

Answer 5

Name Unit Symbol
Distance Meter L
Mass Kilogram M
Time Second T
Current Ampere I
Light Candela J
Heat Kelvin K
Concentration Mole N

Answer 6

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

Answer 7

reprsentation :
[SPEED] = \(\large{[LT^{-1}]}\)

Answer 8

is this what u wanted @Ruchi. ?

Answer 9

@Ruchi. candela sybol is cd sorry !

Answer 10

right J is the symbol of Joule ( unit of energy )

Answer 11

Any physical quantity Q can then be dimensionally expressed as

[Q] = L^1 M^2 T^3

Answer 12

THE ONE WHICH SEEMS TO BE POWERS IN MATH IS CALLED DIMENSIONS IN PHYSICS

Answer 13

P.S though not every where

Answer 14

do you have any books to refer to ?

Answer 15

@mathslover i don't know how to find dimension of any physical quantity.

Answer 16

Of any physical quantity :?

you mean like find the dimensions of velocity , speed etc.?

Answer 17

Area = length * length = L^2
UNDERSTOOD ? @Ruchi.

Answer 18

any i mean plz tell me that hw can we find dimension of any quantity.

Answer 19

okay

Answer 20

Volume = Length * area
= Length * Length * Length
= L^3

Answer 21

understood that ?

Answer 22

yes

Answer 23

do you intent someone else to explain , or am i to continue ?

Answer 24

plz continue

Answer 25

okay

Answer 26

Angle = Arc / Radius
= no dimensions

Answer 27

you know why ?

Answer 28

why?

Answer 29

arc = L
radius = L
so both gets cancelled

Answer 30

understood ?

Answer 31

ok

Answer 32

Density = Mass / Volume
= M / L^3
= M^1 L^-3