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 1.8e6 ohms. One pulse is delivered every time the fully charged capacitor loses 62.9 % of its original charge. What is the capacitance of the capacitor? Answer in farads.
Because the capacitor loses 62.9% of its original charge:
q = ...
The solution is given as a step-by-step equational process.