You Are the Science Officer on a Visit to a Distant

question 4

Multiple Choice

You are the science officer on a visit to a distant solar system.Prior to landing on a planet you measure its diameter to be 1.8 × 10⁷ m and its rotation period to be 22.3 hours.You have previously determined that the planet orbits 1.8 × 10¹¹ m from its star with a period of 402 earth days.Once on the surface you find that the acceleration due to gravity is 59.7 m/s².What are the mass of (a) the planet and (b) the star? (G = 6.67 × 10^-11 N ∙ m²/kg².)

• A)(a)7.2 kg × kg,(b)2.9 kg × kg
• B)(a)1.3 kg × kg,(b)2.9 kg × kg
• C)(a)7.2 kg × kg,(b)1.7 kg × kg
• D)(a)1.3 kg × kg,(b)1.7 kg × kg

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