Calculate the activity of 1.0 μg of cobalt-60 (half-life 5.27 years).
From Paper 2
5(b)3 marks
Calculate the binding energy per nucleon of helium-4. Mass of nucleus = 4.00151 u, proton 1.00728 u, neutron 1.00867 u, 1 u = 931.5 MeV.
From Paper 2
5(c)*6 marks
Explain the roles of the moderator, control rods and coolant in a thermal nuclear reactor, and why a moderator is needed.
From Paper 2
5(d)3 marks
Describe how to check that gamma radiation obeys an inverse-square law.
From Paper 2
251 mark
Alpha-particle scattering showed that:
From Paper 2
261 mark
The distance from a gamma source doubles. The corrected count rate becomes:
From Paper 2
271 mark
What fraction of a radioactive sample remains after three half-lives?
From Paper 2
281 mark
What is the decay constant of a nuclide with half-life 5.0 minutes?
From Paper 2
291 mark
Nucleus X has nucleon number 216 and nucleus Y has 27. What is radius X ÷ radius Y?
From Paper 2
301 mark
Which nucleus has the highest binding energy per nucleon?
From Paper 3 (Section A + Option A: Astrophysics)
5*6 marks
Describe how to investigate how the intensity of gamma radiation varies with distance from a source. Include safety precautions and how you would analyse the data.
Score 0 / 28 · 0 of 11 marked
This paper is written by Plasmo in the style of the AQA A-Level Physics exam. It is not a past paper and is not produced or endorsed by the exam board.