00:00the binding energy of a nucleus is 225 mega electron volt
00:08what is the mass defect of the nucleus in atomic mass unit
00:15so 225 mega electron volt is del m
00:20so you need binding energy to divide 931.5
00:28mass defect multiply by 931.5
00:31mass defect to answer 0.2415 amu atomic mass unit
00:42یہ ہو گیا question number four
00:44so
00:44so
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