DP Physics (last assessment 2024)

Question 19N.3.SL.TZ0.11b(i)

b(i).

[Maximum mark: 2]

19N.3.SL.TZ0.11b(i)

(b(i))

Estimate the age of the universe in seconds using the Hubble constant H₀ = 70 km s^–1Mpc^–1.

[2]

Markscheme

$H = « \frac{70 \times 10^{3}}{(10^{6} \times 3.26 \times 9.46 \times 10^{15})} = » 2.27 \times 10^{- 18} « s^{- 1} »$ ✔

$T = « \frac{1}{2.27 \times 10^{- 18}} = » 4.4 \times 10^{17} s$ ✔

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