O-LevelPhysicsForces5054/12 · May/June 2019 · Q131 Mark
A length of metal wire is made from a radioactive isotope of the metal. The diagram shows masses suspended from the end of the wire. The masses are removed from the wire. Which property changes?
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
Ahalf-life of the isotope
Blength of the wire
Cmass of the wire
Dmelting point of the metal
✓ Correct answer
B: length of the wire
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