Which best describes the difference between speed and velocity? a) velocity is instantaneous.
b) speed is a vector quantity.
c) speed includes rate of change and direction.
d) velocity includes rate of change and direction.

Option D describe the best this statement .

Explanation:

As velocity is the quantity which includes the rate of change as well as direction

o conteúdo de calor de um sistema é igual à entalpia apenas para um sistema que é constante