IB Physics HL E 5 5 Hr Diagram Regions Topic Practice

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Question 1

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The diagram shows a simplified energy-balance model for the Earth surface-atmosphere system.

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The following data are given:

 Average albedo of Earth =0.30 Average global temperature of the surface =288 K Average Earth-Sun distance =1.5×1011 m\begin{aligned} \text { Average albedo of Earth } & =0.30 \\ \text { Average global temperature of the surface } & =288 \mathrm{~K} \\ \text { Average Earth-Sun distance } & =1.5 \times 10^{11} \mathrm{~m} \end{aligned}

The positions of the Sun and the star Antares are shown in the Hertzsprung-Russell (HR) diagram.

Figure for Question 1 — IB Physics HL

State the star type of Antares.

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