[填空题]
How much energy is storex9s a,a /utdeusq);a5xhh5383 v hebfd bp)1ynz5r4yfm llyxmyn 74 7x 1y the electric field between two square plates, 8.0 cm on a side, separated by a 1.5-mm air gap? The charges on the plates are equal and opposite and of magnixzm y1r5)ny4x1my7 y7p4flnl tude $420\mu C$. J
