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Unformatted text preview: Hint: see p. 33 of the textbook. (c) The same scientist has an image of two stars; one of the stars appears to be orange, and the other is blue. Which star has a higher surface temperature? (d) Let's say the scientist calculates the surface temperature of the stars to be 2000K and 15,000K, respectively. How much more power per square meter does the hot star emit than the cold star? (4) At the star party we used a telescope with a 6-inch aperture. The Mt. Wilson observatory uses a telescope with a 60-inch aperture. How much more light does the Mt. Wilson telescope collect than ours? (5) You have just discovered an asteroid with a small moon in its orbit. You are able to determine the average density of the asteroid to be 2 g/cc. Assuming the asteroid is partly rock (2.5 g/cc) and partly ice (1 g/cc), determine the fractional composition of the asteroid. Hint: let x equal the fraction of asteroid composed of rock and 1-x equal the fraction from ice....
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- Spring '08