11Your answer is correct according to the book :)
But
1 is ok but how 2? a quantity having a unique direction can still be a vector
Time has a direction, it can never be negative still it is a scalar and not a vector quantity. Which statement is the correct explantion for the time not being a vector?
1) It is not obeying law of parallelogram addition.
2)It has unique direction.
3)Both a and b
4) none of the above
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16 Answers
1(3)
as these are the two cases which account for time not being a vector
111remember hydrostatic pressure is also a scalar due to same reason
11What about area vector , dipole moment
they have unique direction and are still vectors
11subash s agree with u i also thought the same
but a queation is largely
VAGUE
11time has a unique direction.... past → future....so 2 is right
11read the question
Time has a direction, it can never be negative still it is a scalar and not a vector quantity. Which statement is the correct explantion for the time not being a vector?
how does having a unique direction explain that time is not a vector???
1i think d)none of d above.. as one cant define d direction of time ..
1k.. then dis might be lik dis..
a vector in a plane is said to ve direction throughout d plane.. but time has a unique direction....
naturally It is not obeying law of parallelogram addition...
so it cannot be a vector...
ellam appa appa thonum..!!!!
11Anirudh: i think that it is not a vector bcos it has a UNIQUE direction
other vectors can be made to have different directions
like E, B, F,....
me: but take the examples like dipole moment,
area vector
they also have unique directions
Anirudh: look
me: yes looking
Anirudh: x axis as time axis
me: yes
Anirudh: the value goes from 0 to infinity
me: yup
Anirudh: take another plane (with time not on x axis)
me: then
Anirudh: place two charges one at (-a,0) and the other (0,a)
me: why are you bringing in charge
Anirudh: let the charges be at (-a,0) and (a,0)
me: equal charges?
Anirudh: dei, sorry da
ie hanged
me: oh
Anirudh: ok....solution continues
me: k
Anirudh: took the charges??
me: ii asked whether equal or not>
Sent at 6:20 PM on Thursday
Anirudh: equal da
ok?
me: k
Anirudh: so dipole moment points in the direction +i
right?
me: k
rite
Anirudh: ok then
me: then?
Anirudh: Now consider -q at (-1,1,)
sorry
(-1,-1)
and place +q at (1,1)
me: k i think im getting what you are coming to say
Anirudh: so dipole now points in the direction
i+j
so u ssee?? direction is not unique
me: similarly in the case of time take the axis in the direction of j then?
Anirudh: no
this is enough to prove that direction of dipole is not unique
:)
understood the solution?
any arguements?
me: no for now
9dipole moment has diff directions
up down left right how can u say it has unique direction?
11But Celestine I was talking about it in the sense that it is always directed from negative to positive.
This is the case with time also past →future
Isnt there an analogy there?
1Even i think ans should be 'a' coz the fact dat it has a unik dirn doesn't explain dat it's a scalar...!!
Even current has a unik dirn but it's a scalar coz it doesn't obey law of llm of vectors!
I dunno y the ans is c
