Scalar controversy?

[Capiert]

Have we forgotten something (that might help explain)?

 

https://www.physicsforums.com/threads/scalar-quantity-can-it-be-negative.407547/

 

Scalar is the magnitude

of a vector.

I think that's the best description,

(that they described)

it excludes the direction part of a vector.

In other words if you had to describe,

"both" parts of a "vector",

1 is its amount, the scalar (quantity);

& the other is its (orthogonal=90 degree)

"bidirection" (="double" 90 degree or orthogonal as)

possibility.

 

That is a subtle (2+1=3) triple meaning,

buried hidden inside.

We're dealing with (double) 90 degrees,

without saying it.

Instead (we say) 180 degrees (for the bidirection, minus).

 

At least, that is the most meaning(ful) definition for me.

 

As soon as we set (define) where zero is,

for a negative polarity,

we can have minus (=180 degrees).

 

But the unique thing about vectors is

they are about "direction", (in 3D space);

that's not just position.

It has to do with that 90 degree concept (orthogonal)

of the axii (x, y, & z)

to each other.

 

That has the most meaning,

in my definition (perspective, =way of seeing things).

It distingushes what it's all about,

by taking a specific example

for a/the example,

to explore & test the concept,

& help (self)define it.

 

Anti-thesis:

 

Then if we take temperature (called a scalar)

we can see that [it] has no (x,y,z) direction. e.g.

if we rotate the thermometer thru the (different x,y,z) axii a bit,

for the negative temperature (e.g. -10 C),

the negative temperature stays the same,

it does not depend on 1 of "6 directions" (+/- x,y,z).

(Celsius) Temperature does not depend on (+/- x,y,z, 90 degree) "direction",

although it has negative (=180 degree=opposite) polarity.

 

That's just taking practical examples to help (explain) define

what it's all about.

In the end, we find out we are dealing with 6 main directions,

written in a very compact form (+/-x,y,z).

That's what vectors are all about, (wrt zero).

 

Ruffly said.

 

Back to the basics.

 

(Strange I can feel your criticism,

is this website tapped?)

[Strange]

Scalar is the magnitude

of a vector.

 

The magnitude of a vector is always a scalar but not all scalars are the magnitudes of vectors. As in your example of temperature.

 

I'm not sure what the question or controversy is?

[imatfaal]

!

Moderator Note

 

Capiert

 

You need to up your game. This OP is exactly the sort of melange of guesswork, assertion, and misunderstanding that I warned you against repeating. It is clear from your every post that you do not comprehend the basics of the topics which you are seeking to revise.

 

This is hubris of the highest order - please stop.

 

If your next post in this thread is not more scientific then I will consider locking this thread as well - it can be seeking knowledge, asking questions of the members, or proposing new ideas; but it must not have as its foundation your naked belief that you have access to knowledge and intuition that the scientific community lacks.