The position of a particle in a rectangular co-ordinate system is (3, 2, 5). Then its position vector will be:
1.
2.
3.
4. None of these
A scalar quantity is one that:
1. | is conserved in a process. |
2. | will never accept negative values. |
3. | must be dimensionless. |
4. | has the same value for observers with different orientations of axes. |
If \(\vec{a}\) is a vector and \(x\) is a non-zero scalar, then which of the following is correct?
1. \(x\vec{a}\) is a vector in the direction of \(\vec{a}\)
2. \(x\vec{a}\) is a vector collinear to \(\vec{a}\)
3. \(x\vec{a}\) and \(\vec{a}\) have independent directions
4. \(x\vec{a}\) is a vector perpendicular to \(\vec{a}\)