Take a look at this Video clip and consider what kind of measurements were conducted or considered during the race. ?
A scientific measurement requires:
(1) The definition of the physical quantity.
(2) The units.
The value of a physical quantity is actually the product of a number and a unit.
The precision of the measurement result is determined by procedures used to measure them.
Length: Our “How far?” question involves being able to measure the distance between two points.
Time: To answer the question, “How long did it take?”