AQA
A Level
A Level Physics
Nuclear Physics 2 (Answers)
2022
Total Marks:/30
, 1. The equivalence of mass and energy, quantified by Einstein’s famous equation E = mc2, underpins all
nuclear reactions.
Total for Question 1: 13
(a) Calculate the energy equivalent of the following:
i. The mass of an electron. [2]
Solution: 8.20 × 10−14 J
ii. A human weighing 700 N. [2]
Solution: 6.42 × 1018 J [4]
(b) Calculate the final mass when an 4He nucleus is taken from rest to having kinetic energy of 5.0 MeV.
Will this change be an increase or2 a decrease?
Solution: 6.7 × 10−27 Kg
An increase.
A Level
A Level Physics
Nuclear Physics 2 (Answers)
2022
Total Marks:/30
, 1. The equivalence of mass and energy, quantified by Einstein’s famous equation E = mc2, underpins all
nuclear reactions.
Total for Question 1: 13
(a) Calculate the energy equivalent of the following:
i. The mass of an electron. [2]
Solution: 8.20 × 10−14 J
ii. A human weighing 700 N. [2]
Solution: 6.42 × 1018 J [4]
(b) Calculate the final mass when an 4He nucleus is taken from rest to having kinetic energy of 5.0 MeV.
Will this change be an increase or2 a decrease?
Solution: 6.7 × 10−27 Kg
An increase.
