IB Physics SL E 3 9 Neutrinos and Antineutrinos Questions

Identify SL neutrinos and antineutrinos in beta decay, using charge, particle type and Feynman-diagram evidence.

Exam points

identify the neutrino or antineutrino emitted in beta-minus and beta-plus decay and state its charge
distinguish electron, positron, neutrino and antineutrino products in nuclear-decay questions
complete labelled beta-decay or Feynman diagrams with the correct particle and arrow direction while conserving charge and lepton number

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Study E.3.9—Neutrinos and antineutrinos conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

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This question is in two parts. Part 1 is about kinematics and gravitation. Part 2 is about radioactivity.
Part 1 Kinematics and gravitation
A ball is released near the surface of the Moon at time t=0. The point of release is on a straight line between the centre of Earth and the centre of the Moon. The graph below shows the variation with time t of the displacement s of the ball from the point of release.

Figure for Question IB Physics SL E 3 9 Neutrinos and Antineutrinos Questions question 1 — IB Physics SL

The nuclear equation for the decay of calcium-47 into scandium-47 $\left({ }_{21}^{47} \mathrm{Sc}\right)$ is given by

{ }_{20}^{47} \mathrm{Ca} \rightarrow{ }_{21}^{47} \mathrm{Sc}+{ }_{-1}^{0} \mathrm{e}+\mathrm{X}

Identify X .

(electron) anti-neutrino $/ \bar{v}$ ;

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IB Physics SL E 3 9 Neutrinos and Antineutrinos Questions question 1