Figure 1.14 shows a mechanical artificial heart valve. If this valve opens and closes once during each cycle, or beat, of the heart, how many times will the valve need to open and close during 10...

Figure 1.14 shows a mechanical artificial heart valve. If this valve opens and closes once during each cycle, or beat, of the heart, how many times will the valve need to open and close during 10 years of continuous use? Measure your own heart rate (describe how you do it) and use this rate in answering this question.

Figure 1.14