[填空题]
A cardiac defibrillator is used to shock a heart+h 1lo/bo1 phn)zca +d that is beating errati gp0 4fk5x-pnus9k 1sncally. A capacitor in this defgkn1k 9s sp0n- p4xu5vice is charged to 5.0 kV and stores 1200 J of energy. What is its capacitance? $ \times10^{-5 }\,F$
