Abdul has volunteered to participate in an experiment evaluating the effectiveness of aspirin. neither he nor the experimenters know whether the pills he takes during the experiment contain aspirin or are merely placebos. the investigators are apparently making use of

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.

explanation:

daily refers to frequency, like weekly or monthly. take this medicine twice daily, once in the morning and again at bedtime. on a daily basis there refers to everyday life, to one's normal or usual behavior, activity, routine, or schedule, to the quotidien.

aed pads should be placed in the middle of the child's chest. this ensures that the electricity can properly run through the child's body and hopefully cause his/her heart to start again. hope this : )