This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: The first confirmed black hole, Cygnus X-1, was regarded as proof that black holes exist because it ... (Read 32 times)

SGallaher96

  • Hero Member
  • *****
  • Posts: 509
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


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Ksh22

  • Sr. Member
  • ****
  • Posts: 297
Reply #1 on: Jul 27, 2018
Answer to Question 1

e

Answer to Question 2

b


SGallaher96

  • Hero Member
  • *****
  • Posts: 509
Reply #2 on: Jul 27, 2018
Both answers were spot on, thank you once again


Ksh22

  • Sr. Member
  • ****
  • Posts: 297
Reply #3 on: Jul 27, 2018
Great! Please up vote :D


« previous next »
 

Did you know?

Approximately 25% of all reported medication errors result from some kind of name confusion.

Did you know?

Street names for barbiturates include reds, red devils, yellow jackets, blue heavens, Christmas trees, and rainbows. They are commonly referred to as downers.

Did you know?

The use of salicylates dates back 2,500 years to Hippocrates’s recommendation of willow bark (from which a salicylate is derived) as an aid to the pains of childbirth. However, overdosage of salicylates can harm body fluids, electrolytes, the CNS, the GI tract, the ears, the lungs, the blood, the liver, and the kidneys and cause coma or death.

Did you know?

Most fungi that pathogenically affect humans live in soil. If a person is not healthy, has an open wound, or is immunocompromised, a fungal infection can be very aggressive.

Did you know?

Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.

Walrus using its tusks to hang on breathing hole in the ice near St. Lawrence Island, Bering Sea Walrus using its tusks to hang on breathing hole in the ice near St. Lawrence Island, Bering Sea
Booker T. Washington in his office at Tuskegee Institute, 1900. Washington chose a policy of accommo Booker T. Washington in his office at Tuskegee Institute, 1900. Washington chose a policy of accommo
Wassily Kandinsky, Black Lines (Schwarze Linien). Wassily Kandinsky, Black Lines (Schwarze Linien).
A black impact socket. Always use an impact-type socket whenever using an impact wrench to avoid ... A black impact socket. Always use an impact-type socket whenever using an impact wrench to avoid ...
As a result of a hole in the graph, which of the following functions does not have an average ... As a result of a hole in the graph, which of the following functions does not have an average ...
Video: Diversity of Living Creatures - Charles Darwin & the Beagle's Voyage

For a complete list of videos, visit our video library