Practise

Question bank

Original exam-style questions, mapped to your syllabus. Answers are checked for mathematical equivalence and every attempt updates your mastery.

TopicSkillDifficulty

12 questions

SA-9702-NP1-0031 markL1 FoundationCalculatorMass defect

Calculate the energy equivalent of

1.0

g of mass, in units of

10^{13}

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SA-9702-NP1-0041 markL1 FoundationCalculatorMass defect

The binding energy of a nucleus is

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SA-9702-NP1-0051 markL1 FoundationCalculatorBinding energy curve

The binding energy per nucleon is greatest for nuclei with nucleon numbers near

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SA-9702-NP1-0091 markL1 FoundationCalculatorBinding energy curve

Nuclear fusion is

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SA-9702-NP1-0121 markL1 FoundationCalculatorMass defect

Mass defect is

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SA-9702-NP1-0012 marksL2 StandardCalculatorMass defect

A helium-4 nucleus has mass

4.00151

u. A proton has mass

1.00728

u and a neutron

1.00867

u. Calculate the mass defect, in u.

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SA-9702-NP1-0021 markL2 StandardCalculatorMass defect

Using a mass defect of

0.03039

u for helium-4, calculate the binding energy per nucleon, in MeV. (

1

=931.5

MeV)

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SA-9702-NP1-0061 markL2 StandardCalculatorBinding energy curve

Fission of a uranium nucleus releases energy because

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SA-9702-NP1-0072 marksL2 StandardCalculatorMass defect

In a fission reaction the total mass decreases by

0.20

u. Calculate the energy released, in MeV.

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SA-9702-NP1-0081 markL2 StandardCalculatorMass defect

Calculate the energy equivalent of

1

u, in units of

10^{-10}

J. (

1

=1.66\times10^{-27}

kg;

c=3.00\times10^8

m s⁻¹)

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SA-9702-NP1-0101 markL2 StandardCalculatorBinding energy curve

Compared with the separate nucleons, a stable nucleus has

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SA-9702-NP1-0113 marksL3 ExamCalculatorBinding energy curve

Uranium-235 has binding energy per nucleon

7.6

MeV. It splits into two fragments with

A=95

and

A=138

(plus

2

neutrons), each with binding energy per nucleon

8.5

MeV. Calculate the energy released, in MeV.

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