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A proton is fired from far away toward the nucleus of a mercury atom. Mercury is element number 80, and the diameter of the nucleus is 13.8fm. If the proton is fired at a speed of 3.78E+7m/s, what is its closest approach to the surface of the nucleus? (Assume the nucleus remains at rest.) Submit Answer Tries 0/10 A proton and an alpha particle (q=+2.00e, m = 4.00u) are fired directly toward each other from far away, each with an initial speed of 0.121c. What is their distance of closest approach, as measured between their centers? (Hint: There are two conserved quantities. Make use of both.) Submit Answer Tries 0/10 Two spherical drops of mercury each have a charge of 0.188nC and a potential of 336.0V at the surface. The two drops merge to form a single drop. What is the potential at the surface of the new drop? Submit Answer Tries 0/10 Three electrons form an equilateral triangle 3.29nm on each side. A proton is at the center of the triangle. What is the potential energy of this group of charges? Submit Answer Tries 0/10