[填空题]
(a) What is the electri+vv,(o8lrb lewmb t2 zm;9qr;c potential a distance of,) / c ;rp4kii,y-teg0 nbrcjx $ 2.5\times10^{-15 }\,m$ away from a proton? $ \times10^{ 5}\,V$
(b) What is the electric potential energy of a system that consists of two protons $2.5 \times10^{-15 }\,m$ apart — as might occur inside a typical nucleus? $ \times10^{ -14}\,J$