You Are the Science Officer on a Visit to a Distant

question 12

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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Definitions:

Mosses

Small, non-vascular plants that typically form dense green clumps or mats, often in damp or shady locations.

Lichens

Symbiotic associations between a fungus and a photosynthetic partner, usually an algae or cyanobacteria, which live together as a single, unique organism.

Sedges

A family of grass-like plants, often found in wet grounds, distinguished by their edges (edges, sedges) and triangular stems.

Ocean Zones

The division of the ocean into different layers or regions, typically based on depth, light penetration, distance from the shoreline, and ecological characteristics.