Vector

A vector describes a movement from one point to another.
Vector notation
A vector quantity has both direction and magnitude (size).
(In contrast a scalar quantity has magnitude only - eg, the numbers 1, 2, 3, 4...)
For example this arrow represents a vector. The direction is given by the arrow, while the length of the line represents the magnitude.
This vector can be written as: , a, or .
In print, a is written in bold type. In handwriting, the vector is indicated by putting a squiggle underneath the letter:
Question
Write down the 3 ways to describe the vector if the arrow is now pointing from B to A.
Answer
Remember that the arrow describes the direction. So, in this case, the vector is from B to A. If we move 'backwards' along a vector, it becomes negative, so a becomes -a. Moving from B to A entails moving 3 units to the left, and 4 down.
So the three ways to write this vector are:
, -a and
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Neraka

dalam hadits di ceritakan: Jibril datang kepada Nabi Muhammad, maka beliau berkata. "Wahai Jibril, sifatilah kepadaku tentang neraka," Jibril berkata, "Allah telah menciptakan neraka. Api nya sudah dinyalakan 1000 tahun yang lalu, sampai neraka berwarna hitam, hitamnya neraka seperti hitamnya malam yang gelap, apinya tidak pernah padam, juga terus menjilat-jilat, bara api selamanya tidak pernah padam,"



to be continued

Welcome!

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