... mn = 1, 00867u; 1u = 1, 6604 3 .10 -27kg; c = 2,9979 .10 8 m/s; 1J = 6,2 418 .10 18 eV A: 5B 11: 74,5MeV; 92U238: 18 05MeV B: 5B 11: 76,2MeV; 92U238: 18 02MeV 11 238 C: 5B : 77,4MeV; 92U : 18 00MeV D: 5B 11: 78,2MeV; ... nguyờn t 2He3 = 3, 016 303 u; ca nguyờn t 1H1 = 1, 007825 u; ca nguyờn t -27 18 2He = 4,00260u; 1u = 1, 6604 3 .10 kg; c = 2,9979 .10 m/s; 1J = 6,2 418 .10 eV A: 18 ,3 MeV B: 19 ,5 MeV C: 19 ,8 MeV D: 20,2 ... (m) n 240 (m) thỡ in dung C phi nm gii hn A: 9 .10 10 F C 16 .10 F B: 9 .10 10 F C 8 .10 F C: 4,5 .10 12 F C 8 .10 10 F D: 4,5 .10 10 F C 8 .10 F Cõu 15 : Chn phỏt biu Sai núi v s thu súng in t?...