Q.2.What is a unit?

If P(-1,2) and Q(3,-7) are two points, express the vectors vec(PQ) in terms of unit vectors hatiand hatj . Also find the distance between points P and Q. What is the unit vector in the direction of vec(PQ) ? Verify that magnitude of unit vector indeed unity.

If P(-1,2) and Q(3,-7) are two points, express the vector PQ in terms of unit vectors hati and hatj also, find distance between point P and Q. what is the unit vector in the direction off PQ?

The x- component of a certain vertor is 2 units and y- component is + 2sqrt3 units. What is the magnitude of vector.

What is the unit’s place of 12^123 ?

What is the unit’s digit of 121^(121) ?

If two unit vectors vec(p) and vec(q) make an angle (pi)/(3) with each other, what is the magnitude of vec(p)-(1)/(2) vec(q) ?

What will be unit digit in 2^10-3^10

If velocity of light is taken as the unit of velocity and an year is taken as the unit of time, what is the unit of length? What is it called?