plete If the situation is caught in time, passing a jolt of current through the heart can realign the electrical signals in the heart and start it beating tial again. The device that delivers this current is a defibrillator. $($See the figure at the right.$)$ The heart of a heart defibrillator is a big capacitor. A battery takes perhaps half a minute to charge this capacitor. This capacitor has a capacitance of $54F($microFarads$)$ and, when turned on$,$ is charged by a battery to $4,200$ volts.

Part $($a$)$

How much charge is stored on each plate of the capacitor when it is fully charged? Give your answer in Coulombs.

$Q=0\mathrm{.}2268C$

$$ Correct!

Part $($b$)$

How much energy is stored in the capacitor when it is fully charged? Give your answer in Joules.

$E=476\mathrm{.}28$

$E=476\mathrm{.}3J$

$$ Correct!

Part $($c$)v$

The energy in the capacitor is delivered by placing paddles on either side of the victim's heart as shown in the figure at the right.

The defibrillator delivers that charge in a millisecond through the paddles, and the hope is that the shock resets the heart so it can begin beating normally. The charge is delivered in a sudden pulse that lasts about $100$ ms $.$ What is the average current, I, flowing through the body? Give your answer in Amperes.

$I=2\mathrm{.}268A$

$$ Correct!

Part $($d$)$

If all the energy stored in the capacitor is delivered in electric current, what is the voltage difference at which the current was delivered? Give your answer in Volts.

$V=136\mathrm{.}0V,x$ Attempts Remain

Part $($e$)$

Calculate the effective resistance of the path of the current through the body in Ohms.