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Author Question: The first confirmed black hole, Cygnus X-1, was regarded as proof that black holes exist because it ... (Read 90 times)

SGallaher96

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on: Jul 27, 2018
The first confirmed black hole, Cygnus X-1, was regarded as proof that black holes exist because it
 
  a. is a compact object in a binary system
 b. emits X-rays from a hot accretion disk
 c. is accreting matter from a main-sequence companion
 d. has a period of 5.6 days
 e. has a mass of ten solar masses

Question 2

Kepler's laws of planetary motion were _____ because he could not provide an explanation for his conclusions.
 
  a. unnatural
 b. empirical
 c. hypothetical
  d. principles
 e. assumptions


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Ksh22

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Reply #1 on: Jul 27, 2018
Answer to Question 1

e

Answer to Question 2

b


SGallaher96

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Reply #2 on: Jul 27, 2018
Both answers were spot on, thank you once again


Ksh22

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Reply #3 on: Jul 27, 2018
Great! Please up vote :D


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