Assume Earth and a cloud layer 0.900 Km above the Earth can be treated as plates of a parallel-plate capacitor.

a. If the cloud layer has an area of 2.00 × 10^4 m2, what is the capacitance?

b. If an electric field strength of 2.0 × 10^5 N/C causes the air to conduct charge (lightning), what charge can the cloud hold?

c. Describe what must happen to its molecules for air to conduct electricity.

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