Which of the following statements is true?
a. both mass and weight depend on the position of an object.
b. neither mass nor weight depend on the position of an object.
c. mass depends on the position of an object, but weight does not.
d. weight depends on the position of an object, but mass does not.

c. the runner should sprint as fast as possible to the finish line.

the more fit you are, the faster the recovery. your heart rate drops most sharply in the first minute after you stop exercising; it should then fall about 20 beats a minute—a drop of less than 12 beats a minute is considered abnormal. this “recovery heart rate” is measured as part of an exercise stress test.