DP Physics (last assessment 2024)

Question 18N.3.SL.TZ0.b

Date	November 2018	Marks available	[Maximum mark: 3]	Reference code	18N.3.SL.TZ0.b
Level	SL	Paper	3	Time zone	TZ0
Command term	Determine	Question number	b	Adapted from	N/A

[Maximum mark: 3]

18N.3.SL.TZ0.b

The graph shows the variation with distance from the Earth of the recessional velocities of distant galaxies.

Using the graph, determine in s, the age of the universe.

[3]

Markscheme

use of gradient or any point on the line to obtain any expression for either ${\text{H}} = \frac{{\text{v}}}{{\text{d}}}$ or ${\text{t}} = \frac{{\text{d}}}{{\text{v}}}$ ✔

correct conversion of d to m and v to m/s ✔

= 4.6 × 10¹⁷ «s» ✔

Syllabus sections

Option D: Astrophysics

Option D: Astrophysics » Option D: Astrophysics (Core topics) » D.3 – Cosmology

Option D: Astrophysics » Option D: Astrophysics (Core topics)

Question 18N.3.SL.TZ0.b

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