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Q1. Charge q_1 is distance d from the negative plate of a parallel-plate capacitor. Charge q_2 = q_1 /3 is distance 4d from negative plate. What is the ratio U_1 /U_2 of their potential energies?

Q2. How long does it take an automobile travelling 56.50 km/h to become even with a car that is travelling in another lane at 36.50 km/h if the cars' front bumpers are initially 148m apart?

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