Final answer:
To find out how long it takes for a cow's heart to beat 10,000 times at 80 bpm, we calculate 10,000 divided by 80 to get 125 minutes, or approximately 2.0833 hours, or 7,500 seconds. Also, during strenuous exercise at 150 bpm, it takes 0.4 seconds per beat.
Step-by-step explanation:
To calculate how long it would take for a cow's heart to beat 10,000 times at a rate of 80 beats per minute, we use the formula for time which is Time = Total Beats ÷ Rate per Minute. First, we find how many minutes it takes for the heart to beat 10,000 times by dividing 10,000 by 80. This calculation gives us 125 minutes.
Next, to convert 125 minutes to hours, we divide by 60, since there are 60 minutes in an hour. This gives us approximately 2.0833 hours. If we need the answer in seconds, we can multiply the number of minutes, 125, by 60 seconds per minute, resulting in 7,500 seconds.
The time per beat during a vigorous activity like strenuous exercise, if the heart rate is 150 beats per minute, is found by dividing 60 seconds by the heart rate. That is, Time Per Beat = 60 ÷ 150, yielding 0.4 seconds per beat. This emphasizes the heart's capability to beat rapidly to meet the body’s increased demand for oxygen during exercise.
The average heart rate of 72.0 beats/min over a year shows the endurance of the human heart. A consistent heart rate means that over a span of 2.0 years, a person's heart will beat approximately (72 beats/min) × (60 min/hour) × (24 hours/day) × (365 days/year) × 2 years = 75,974,400 times.