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Thought-Process to Discover Knowledge

Welcome to nubtrek.

Books and other education websites provide "matter-of-fact" knowledge. Instead, nubtrek provides a thought-process to discover knowledge.

In each of the topic, the outline of the thought-process, for that topic, is provided for learners and educators.

Read in the blogs more about the unique learning experience at nubtrek.

User Guide

Welcome to nubtrek.

The content is presented in small-focused learning units to enable you to
think,
figure-out, &
learn.

Just keep tapping (or clicking) on the content to continue in the trail and learn.

User Guide

To make best use of nubtrek, understand what is available.

nubtrek is designed to explain mathematics and science for young readers. Every topic consists of four sections.

nub,

trek,

jogger,

exercise.

User Guide

nub is the simple explanation of the concept.

This captures the small-core of concept in simple-plain English. The objective is to make the learner to think about.

User Guide

trek is the step by step exploration of the concept.

Trekking is bit hard, requiring one to sweat and exert. The benefits of taking the steps are awesome. In the trek, concepts are explained with exploratory questions and your thinking process is honed step by step.

User Guide

jogger provides the complete mathematical definition of the concepts.

This captures the essence of learning and helps one to review at a later point. The reference is available in pdf document too. This is designed to be viewed in a smart-phone screen.

User Guide

exercise provides practice problems to become fluent in the concepts.

This part does not have much content as of now. Over time, when resources are available, this section will have curated and exam-prep focused questions to test your knowledge.

summary of this topic

### Properties of Cross Product

Voice

Voice

Home

»  vector cross product is NOT associative
→  vec p xx (vec q xx vec r) != (vec p xx vec q)xx vec r

### Not Associative

plain and simple summary

nub

plain and simple summary

nub

dummy

•  Cross product is not associative.

simple steps to build the foundation

trek

simple steps to build the foundation

trek

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In this page, you will learn that the vector cross product is not associative.

Keep tapping on the content to continue learning.
Starting on learning "vector Cross product is not associative".

What is associative property of an operator ***?

• (x *** y) *** z = x *** (y *** z)
• x *** y = y *** x
• x *** y = - y *** x

The answer is '(x *** y) *** z = x *** (y *** z)'. The element y in the equation is associated with x first in the left-hand-side, where as it is associated with z first in the right-hand-side.

The vector cross product is not associative. It is proven with one simple example.

Consider two non-zero vectors vec p and vec q.
vec p xx vec p = 0
and so (vec p xx vec p) xx vec q = 0

But, vec p xx vec q is perpendicular to vec p
So vec p xx (vec p xx vec q) !=0

It is proven that (vec p xx vec p) xx vec q !=vec p xx (vec p xx vec q)

comprehensive information for quick review

Jogger

comprehensive information for quick review

Jogger

dummy

Not Associative: For any vector vec p, vec q, vec r in bbb V
(vec p xx vec q) xx vec r != vec p xx (vec q xx vec r)

practice questions to master the knowledge

Exercise

practice questions to master the knowledge

Exercise

Consider (vec x xx vec y) xx vec z = vec p xx (vec q xx vec z). Can the vector vec z be canceled on either side of the equation?

• Yes
• No

Progress

Progress

What is associative property of an operator star?
1
2
3
The answer is "x star y, star z, = , x star, y star z". The element y in the equation is associated with x first in the left-hand-side, where as it is associated with z first in the right hand side.
The vector cross product is not associative. It is proven with one simple example. ;; Consider two non-zero vectors p and q. vector p cross vector p = 0;; so vector p cross vector p, cross vector q = 0;; but vector p cross vector q is perpendicular to vector p. So vector p cross, vector p cross vector q not equals 0. It is proven that the cross product is not associative.
Cross product is not associative.
Not Associative: For any vector p, q, r in vector space V, vector p cross vector q, cross vector r != vector p cross, vector q cross vector r.
Consider the given equation. Can the vector z be canceled on either side of the equation?
yes;s
Yes
no
No