What are co-initial and collinear vectors?

What' is the significance of null vector?

Which one is vector

What is work? It is a scalar or a vector? What do you mean by watt?

What are the direction cosines of the vector veca=hati+2hatj+3hatk ?

What are homo polymer and co-polymer?

Are the points A ,B and C with position vectors -2hati + 3hatj + 5hatk, hati + 2hatj + 3hatk and 7 hati - hatk respectively collinear ?

Fill in the blank If three points are collinear,the area of the triangle form is_______.

Prove that the points P,Q,R are collinear. P(1,5) ,Q(3,14), R(-1,-4)

Prove that the points P,Q,R are collinear. P(1,4),Q(3,-2),R(-3,16)

Prove that the points P,Q,R are collinear. P(a, b+c), Q(b, c+a), R(c, a+b)