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Q. A proton is initially at rest at a point where the potential is 507V. Sometime later the proton is at a point where the potential is 187V. If no force other than the electrostatic force acts on the proton, what is its final kinetic energy?

Q. An automobile gasoline tank holds 46 of gasoline. While the gasoline burns, 161 of oxygen are consumed and carbon dioxide and water are formed. What is the total combined mass of carbon dioxide and water that is produced?

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