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Q. The electrostatic force between two charges located 0.8 meters apart is 0.10 N. What will the force be between these charges when they are located 0.4 meters apart?

Q. An automobile club plans to race a 720 kg car at the local racetrack. The car needs to be able to travel around several 140 m radius curves at 95 km/h. What should the banking angle of the curves be so that the force of the pavement on the tires of the car is in the normal direction?

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