[填空题]
In lightning storms, the potential difference between the Efoyz ,3mt8c,--e24 pqmjq agzarth and the bottoh*8g/cbd)l97xcn j yr m of the thunderclouds can be as high as 35,000,000 V. The bottoms ogjy b8lrchd )x /cn*79f the thunderclouds are typically 1500 m above the Earth, and can have an area of $110km^2$ Modeling the Earth–cloud system as a huge capacitor, calculate
(a) the capacitance of the Earth–cloud system, $ \times10^{-7 }\,F$
(b) the charge stored in the “capacitor,” C(Round to the nearest integer)
(c) the energy stored in the “capacitor.” $ \times10^{8 }\,J$
