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V Part A Three equal point charges, each with charge 1.95 /C , are placed at the vertices of an equilateral triangle whose sides are of length 0.700 m . What is the electric potential energy U of the system? (Take as zero the potential energy of the three charges when they are infinitely far apart.) View Available Hint(s) AEd SubmitPart A The plates of a parallel-plate capacitor have a separation of 4.28 mm, and each has an area of 13.2 cm". Each plate carries a charge of magnitude 6.35x10- C. The plates are in vacuum. What is the capacitance? For related problemsolving tips and strategies, you may want to view a Express your answer with the appropriate units. Video Tutor Solution of Properties of a parallel-plate capacitor. HA C = Value Units Submit Request Answer Part B What is the potential difference between the plates? Express your answer with the appropriate units. HA V Value Units Submit Request Answer Part C What is the magnitude of the electric field between the plates? Express your answer with the appropriate units. HA + 0 = ] ? E: Value Units Submit Request AnswerReview | Constants Part A An alpha particle with a kinetic energy of 13.0 MeV makes a head-on collision with a gold nucleus at rest. What is the distance of closest approach of the two particles? (Assume that the gold nucleus remains stationary and that it may be treated as a point charge. The atomic number of gold is 79, and an alpha particle is a helium nucleus consisting of two protons and two neutrons.) Express your answer in meters. IVO d = 28.4 . 10 -15 m Submit Previous Answers Request Answer X Incorrect; Try Again; 5 attempts remaining Provide Feedback Next >V Part A A +2.30 MC point charge is sitting at the origin. What is the radial distance between the 500 V equipotential surface and the 1000 V surface? Express your answer with the appropriate units. HA d = Value Units Submit Request Answer Part B What is the distance between the 1000 V surface and the 1500 V surface? Express your answer in meters to three significant figures. HA (8 ] ? d = Value Units Submit Request Answer Part C Complete previous part(s)