🚀 go-pugleaf

schumaker@tigger.jvnc.net (schumaker) wrote:
>>> > > >Actually, you only need 2 points to define a plane: a point on the 
>plane and
>>> > > >a normal vector.
>>> > >
>>> > > Sorry to quibble, but...
>>> > >
>>> > >    A VECTOR IS NOT A POINT!!!!
>>> > >
>>> > > Now back to our regular program.
>>> >
>>> > Points are vectors.
>>> > ^^^^^^^^^^^^^^^^^^
>>> 
>>> Sorry, but I must take offense here.  A point in Cartesian space has three
>>> aspects [X,Y,Z].  A vector requires a direction, and depending on how 
>sticky you
>>> are, probably a length.  This implies 6 independent aspects.  Result;  A 
>plane
>>> requires 3 points.  Always.
>>
>>You're wrong. A vector is any quantity with any given number of dimensions. 
>The
>>number 5 is a vector, called a scalar.  The vector [x,y,z] can refer to a 
>position
>>vector (point) or direction vector.
>>
>>I suggest you take some math courses before you try to explain such basic 
>concepts.

>your wrong a vector and a scalar are completely different.  5 is not a vector 
>called a scalar it is a scalar.  Look up in any physics book and a scalar is 
>defined as any given value.  5,10,3.116, any # is a scalar but a vector is 
>number WITH direction ie 5 at 13degress is a vector.

Had my physics book out to answer another of the posts to this threed. . . You
are semi-wrong about the definition of "scalar" it is:

"Physics: Principles and Problems" (My Adv. Physics book):
	SCALAR: Quantity, like distance, that has only a magnitude, or size.

but you are correct that a vector and a scalar are different.  Just not
completely different.  Your definition of vector is correct.  In your definition
of vector the 5 is a scalar.  Which means that you know that 5 is a scalar and
you know that 5 is not a vector.

Well you know what a scalar is by your use in the vector example and yet in your
definition of scalar you make it ANY given number.  I think you typed before you
thought.  Here is what you should have said: "a scalar is defined as any given
value that represents a magnitude".

Not arguing, just correcting.


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