DP Physics (last assessment 2024)

Question 21M.2.SL.TZ1.4b

Date	May 2021	Marks available	[Maximum mark: 2]	Reference code	21M.2.SL.TZ1.4b
Level	SL	Paper	2	Time zone	TZ1
Command term	Calculate	Question number	b	Adapted from	N/A

[Maximum mark: 2]

21M.2.SL.TZ1.4b

(b)

On average, the Moon is the same distance from the Sun as the Earth. The Moon can be assumed to have an emissivity e = 1 and an albedo $α_{M}$ = 0.13. The solar constant is 1.36 × 103 W m⁻². Calculate the surface temperature of the Moon.

[2]

Markscheme

$\sqrt[4]{\frac{1.36 \times 10^{3} \times 0.87}{4 \times 5.67 \times 10^{- 8}}}$ ✓

T = 268.75 «K» ≅ 270 «K» ✓

Syllabus sections

Core

Core » Topic 8: Energy production » 8.2 – Thermal energy transfer

Core » Topic 8: Energy production

Question 21M.2.SL.TZ1.4b

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