What is meant by the phrase "a consistent method of measurement"?
a. all measurements are in si units.
b. things are measured the same way each time.
c. every measurement is exactly the same numerical value.
d. the same person performs all measurements.

Abaseball is thrown from the outfield toward the catcher. when the ball reaches its highest point, which statement is true? (a)its velocity is not zero, but its acceleration is zero. (b) its velocity and its acceleration are both zero. (c) its velocity is perpendicular to its acceleration. (d) its acceleration depends on the angle at which the ball was thrown. (e) none of the above statements are true.