Question

Give an example of each of the following?
1.scalar quantity
2.vector quantity
3.unit vector
4. A physical qauntity which is expressed as vector product of two vectores.

Answer 1

density
velocity
Any quantity whose magnitude is 1
dot product

Answer 2

1.Scalar quantity (has magnitude , no direction) - speed ,time etc.
2.Vector quantity (has both magnitude and direction) - acceleration , velocity etc.

3. quantity of magnitude 1
4.dot product