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if the radius of a metal hoop that surrounds a silo were to expand by 1.00 m, the circumference of the hoop would increase by 6.28 m. If a metal hoop that completely surrounds the earth were to thermally expand so that its radius increased by 1.00m , by how much would its circumference increase?

  • science - , Wednesday, October 26, 2011 at 6:40am

    Circumference = 2 pi R

    (Change in circumference) = 2 pi *(change in R),

    The answer is 2 pi = 6.28 m in both cases

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