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Black Holes
Oops! You need to be a bit more careful with your calculations next
time! Our solutions are:
- Using the following equation, confirm the radius of the black hole for the mass of the Earth.
R = 2MG/c2 = .86 cm
where Me = 5.8 x 1027g, G = 6.67 x 10-8gm2/sec2, and c = 3 x 1010cm/sec.
- If you could weigh a thimbleful (about 1 cm3) of the black
hole/Earth, how much would it weigh?
3.87 x 1027g
- What would be the black hole radius of the Sun, given its mass of
2 x 1033 g?
296,600 cm = 2.966 km
This activity was developed by Jacqueline Slay, Largo High School, Largo, MD
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