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Q. The passengers in a roller coaster car feel 59% heavier than their true weight as the car goes through a dip with a 33m radius of curvature. What is the car's speed at the bottom of the dip?

Q. In a nuclear experiment a proton with kinetic energy 1.5 MeV moves in a circular path in a uniform magnetic field. What energy (in MeV) must (a) an alpha particle (q = +2e, m = 4.0 u) and (b) a deuteron (q = +e, m = 2.0 u) have if they are to circulate in the same circular path.

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