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Which statement about black holes is true?. Physics & Astronomy
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Physics & Astronomy
Which statement about black holes is true?
2019-11-13 20:04:22
Physics & Astronomy
their escape velocity is greater than the speed of light
They form an event horizon at twice the Schwarzschild radius
Their event horizon is a physical surface boundary
their main-sequence mass was 5-10 solar masses
They form from 1.4 solar mass stars.
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