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In a heart pacemaker, a pulse is delivered to the heart 81 times per minute. The...

In a heart pacemaker, a pulse is delivered to the heart 81 times per minute. The capacitor that controls this pulsing rate discharges through a resistance of 2.5 x 106. One pulse is delivered every time the fully charged capacitor loses 59.7% of its original charge. What is the capacitance of the capacitor?

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The equation for discharge of a capacitor in an RC circuit is The idea here is that the time for one pulse is the time for the capacitor to lose 59.7% of its original charge 60 81 If the capacitor loses 59.7% of its charge, then the final potential is only 40.3% of the original 0.74074s 0.403-e RC Taking In on both side In (0.403)--* RC n (0.403 C= 3.26 x10-7F 0.74074 -0.326x10 2.5x10°xIn (0.403)

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