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Home Q & A Board Science-Related Homework Help Physics
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sigsays sigsays
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10 years ago
What would be the Schwarzschild radii of black holes of 1 million and 1 billion solar masses, respectively?
Express your answers using one significant figure. Enter your answers in ascending order separated by a comma.

 r1, r2 = ?




How does the 1-million-solar-mass black hole compare in size with the Sun?
Express your answer using one significant figure.

   r1
rSun = ?



How does the 1-billion-solar-mass black hole compare in size with the solar system?
Express your answer using one significant figure.

  r2
rsolarsystem = ?
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#1
10 years ago
Quote from: sigsays (10 years ago)
How does the 1-million-solar-mass black hole compare in size with the Sun?Express your answer using one significant figure.   r1rSun = ?

Let's find out.

Rs = 2MG / C^2
Rs = (2)((1.98e30)(1.0e6))(6.674e-11) / (299792458)^2
Rs = 2.8 * 10^9m or 2.8 * 10^6km

That would be the Schwarzschilds radius for the one with a million solar masses. To find the one with a billion just change (1.0e6) to (1.0e9).
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