Which of the following is an example of a velocity? 30 miles per hour
30 miles per hour North
30 miles
30 hours

30 miles per hour North

Explanation:

Velocity can be defined as the rate of change in displacement (distance) with time. Velocity is a vector quantity and as such it has both magnitude and direction.

Mathematically, velocity is given by the equation;

Hence, 30 miles per hour North is an example of a velocity because it is a vector quantity that has both magnitude and direction.

the role of the microscope world in creating new materials .

every chemical equation adheres to the law of conservation of mass, which states that matter cannot be created or destroyed. therefore, there must be the same number of atoms of each element on each side of a chemical equation.