DP Physics (last assessment 2024)

Question 18N.3.HL.TZ0.19b

Date	November 2018	Marks available	[Maximum mark: 3]	Reference code	18N.3.HL.TZ0.19b
Level	HL	Paper	3	Time zone	TZ0
Command term	Determine	Question number	b	Adapted from	N/A

[Maximum mark: 3]

18N.3.HL.TZ0.19b

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

(b)

Use the graph to determine the age of the universe in s.

[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.HL.TZ0.19b

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