Two people must have the same speed and velocity if a) they are walking toward each other at 2 m/s. b) they are walking away from each other at 2 m/s. c) they are jogging side by side at 5 m/s. d) they are jogging to two different destinations.

The correct option is C.

Explanation:

Speed is defined as the distance traveled per unit time. It is a scalar quantity as it can be described by the magnitude alone.

Velocity is defined as the distance per unit time in a given direction. It is a vector quantity as both magnitude and direction are required to describe it.

For two people to have same speed and velocity, they both should have same magnitude and should move in the same direction.

By this, the correct option will be C.

answer : (a) volume of the gas = 8.67 ×   l

                (b) second virial coefficient b = -1.21226 l/mole

solution :   given,     t = 300k

                                p = 20atm

                                z = 0.86

                                n = 8.2 mmoles = 8.2 × moles

                                r =   0.082 l atm/k/mol

        find,     (a) volume of gas   and (b) second virial coefficient b at 300k.

formula used :            

                          and            

(a)            

                    = \times 0.082\times 300}{20}[/tex]

                    = 8.67 ×   l

(b)      

                    = (0.00867-1) × 8.659

                    = - 8.5839 l/mole