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ANGULAR DIAMETER- astronomy help- 10pts to 1st best answer!?

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Old 05-08-2008, 03:47 AM
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Default ANGULAR DIAMETER- astronomy help- 10pts to 1st best answer!?

Please help- a step-by-step answer would be most appreciated

"Jupiter's angular diameter at a distance of 4.2 AU from Earth is 46.8 arc seconds (recall that 1 arc second is 1/3600 of a degree). What is the planet's actual diameter and how does it compare to the Earth's diameter? (Take a ratio)."
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