Q1 a lightning bolt transfers 60 coulombs of charge from a, Ask an Expert

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Q1. A lightning bolt transfers 6.0 coulombs of charge from a cloud to the ground in 2.0 10-3 second. What is the average current during this event?

Q2. In a certain region of space, a force F(r) has an associated potential energy of the form U(r) = a r2- b r + c, where a, b, and c are positive constants. What are points, if any, where the force F(r) goes to zero?

Q3. A 1500 car travelling at 26 suddenly runs out of gas while approaching the valley that looks like an inverted hump. 12m at the left where the care runs out of gas and 19 m at the right were it is headed. What will be the car's speed as it coasts into the gas station on the other side of the valley?

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