Mass-energy relation, mass defect, binding energy per nucleon
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See all →- A nucleus with mass number 240 breaks into two fragments each of mass number 120, the binding energy per nucleon of unfragmented nuclei is 7.6 MeV while that of fragments is 8.5 MeV. The total gain in the Binding Energy in the process is : Answer: 4. 216 MeV Key idea: gain in binding energy = total B.E. of fragments - B.E. of parent. 240×7.6=1824 MeV; fragments: 240×8.5=2040 Me... 1
- The energy equivalent of 0.5 g of a substance is : Answer: 2. 4.5×10¹³ J Use Einstein's mass-energy relation E=mc² . E=0.5×10⁻³×(3×10⁸)²=4.5×10¹³\ J Answer: option 2. Remember to convert gram... 1