Which of the following is an example of a vector quantity A) a student walks 2.0km north
B) an object has a mass of 10.5 kg
C) A 1.0 kg object moves at 18 m/s
D) a ball has an instantaneous speed of 15 m/s

A

Explanation:

A vector is a physical quantity that has magnitude and direction, so with A having a magnitude of 2.0km and a direction pointing north⬆️

Hope its helps

if they have a finite resultant

this could be newton#'s law of cooling. the cooling curve is exponential