Question: During a lightning fl ash, there exists a potential difference of Vcloud - Vground = 1.2 109 V between a cloud and the ground.

During a lightning fl ash, there exists a potential difference of Vcloud - Vground = 1.2 × 109 V between a cloud and the ground. As a result, a charge of -25 C is transferred from the ground to the cloud. (a) How much work Wground-cloud is done on the charge by the electric force? (b) I the work done by the electric force were used to accelerate a 1100-kg automobile from rest, what would be its final speed? (c) If the work done by the electric force were converted into heat, how many kilograms of water at 0°C could be heated to 100°C?

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