Question

   The Schwarzschild radius, or event horizon, of a black hole is the distance from a...

   The Schwarzschild radius, or event horizon, of a black hole is the distance from a black hole at which the escape velocity is the speed of light. Calculate the Schwarzschild radius of a black hole with the mass of Mount Rushmore (reminder: Mt. Rushmore has a mass of about 3 x 1013 grams).

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Answer #1

Schwarzschild radius is given by the relation

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Putting the values,

Rs = 2 * 6.673 * 10^-11 * 3*10^10 / (3*10^8)^2

= 4.448*10^-17 m

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