Any main-sequence star over 25 solar masses will probably retain enough matter in its core after its supernova to make a black hole
Indicate whether the statement is true or false
TRUE
Physics & Space Science
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Stars less massive than 0.4 solar mass never become giant stars
a. True b. False Indicate whether the statement is true or false
Physics & Space Science
Which of the following choices best corresponds to what is required by the second law of thermodynamics for any process taking place in an isolated system?
a. entropy decreases c. entropy increases b. entropy remains constant d. entropy equals work done on the system
Physics & Space Science
X-ray bursts and gamma ray bursts have the same distribution pattern in the sky
Indicate whether the statement is true or false
Physics & Space Science
The modification of the standard Big Bang theory is known as the
a. cosmic model. b. Hubble-Leavitt model. c. inflationary model. d. Hertzsprung-Russell model.
Physics & Space Science