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Astrophysics/please help me

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Expert: - 10/28/2008


Question

figure II
Mr. nelson,
Can you please give me the answer to this question if I got it wrong and could you please explain why? . I answered the following question with (B). Please see the attached JPEG. I'm getting to the end of the rope in this class.I need to get this one answered your help will be greatly appreciated.

1- how long is arc ABC in figure II , If the raduis of the circle is 6

(A)6.29 (B) 12.57 (C) 18.86 (D) 25.13

Answer
Perhaps the question is poorly posed.  Did they mean arc ACB instead of ABC?  If it asked arc ACB I would've answered (B) as well, 2/3 of the circumference, but ABC?  That doesn't really make sense.  If they meant arc AB, then the answer is more like (A).
    Questioner's Rating
    Rating(1-10)Knowledgeability = 10Clarity of Response = 10Politeness = 10
    CommentYou are correct it was acb. I did pose it wrong.That's why your the expert and I'am not worthy of your greatness


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Steve Nelson

Expertise

Fusion, solar flares, cosmic rays, radiation in space, and stellar physics questions. Generally, nuclear-related astrophysics, but I can usually point you in the right direction if it's not nuclear-related or if it's nuclear but not astrophysics.

Experience

Currently a physics professor at the University of Texas of the Permian Basin. Doctoral dissertation was on a reaction in CNO-cycle fusion, worked in gamma-ray astronomy in the space science division of the naval research laboratory in the high-energy space environment branch.

Organizations
Physics professor at the University of Texas of the Permian Basin.

Education/Credentials
Ph.D. in physics, research was on nuclear fusion reactions important in stellar fusion.

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