Answer:
Measurement is a comparison of an unknown quantity with a known fixed quantity of the same kind. The value obtained on measuring a quantity is called its magnitude. The magnitude of a quantity is expressed as numbers in its unit.
Based from the basic formula and relationship of distance, time and velocity, it is said that velocity is equal to distance traveled over time covered. The bird has a velocity of 1000/2 or equivalent to 500 miles per week. This can also be expressed in some other units such as km/h. m/s etc.