DP Physics (first assessment 2025)

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Question EXE.2.HL.TZ0.ii

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Date Example questions Example questions Marks available [Maximum mark: 2] Reference code EXE.2.HL.TZ0.ii
Level HL Paper 2 Time zone TZ0
Command term Discuss Question number ii Adapted from N/A
ii.
[Maximum mark: 2]
EXE.2.HL.TZ0.ii

Strontium-90 decays to Zirconium-90 via two successive beta emissions. Discuss whether all the energy released when strontium-90 decays to Zirconium-90 can be transferred to a thermal form.

[2]

Markscheme

(No)  
(anti-)neutrinos are released in (both) decays ✓

Carrying away energy because they interact poorly with matter ✓

 

Ignore arguments relating to energy transferred to nucleus as this appears eventually as thermal energy.

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