DP Physics (first assessment 2025)

Question EXE.2.SL.TZ0.13bii

Date	Example questions Example questions	Marks available	[Maximum mark: 3]	Reference code	EXE.2.SL.TZ0.13bii
Level	SL	Paper	2	Time zone	TZ0
Command term	Determine	Question number	ii	Adapted from	N/A

ii.

[Maximum mark: 3]

EXE.2.SL.TZ0.13bii

(ii)

Pluto is a dwarf planet of the Sun that orbits at a distance of 5.9 × 10⁹ km from the Sun. Determine, in years, the orbital period of Pluto.

[3]

Markscheme

$T_{Pluto}^{2} = T_{Earth}^{2} \frac{r_{Pluto}^{3}}{r_{Earth}^{3}}$ used ✓

Earth orbital radius = 1.5 × 10¹¹ m (from AU) AND uses 1 earth year (in any units) ✓

247 years ✓

Syllabus sections