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Title: Betelgeuse is a star in the constellation Orion. It radiates heat at the rate of Post by: ppk on Mar 14, 2012 Betelgeuse is a star in the constellation Orion. It radiates heat at the rate of 3.00 × 1030 W and has a surface temperature of 3000 K. Assuming that it is a perfect emitter, what is the radius of Betelgeuse? The Stefan-Boltzmann constant is 5.67 x 10-8 W/(m2•K4).
A) 7.80 × 1010 m B) 8.70 × 1010 m C) 1.40 × 1011 m D) 1.90 × 1011 m E) 2.30 × 1011 m Title: Re: Betelgeuse is a star in the constellation Orion. It radiates heat at the rate of Post by: bio_man on Mar 14, 2012 Content hidden
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