The mass of a black hole can be determined by ________.
A. measuring its volume and density
B. applying the modified version of Kepler's Third law, if the black hole is in a binary system
C. the electromagnetic radiation it emits
D. how rapidly it is spinning
Answer: B
You might also like to view...
Isotopic analysis of meteorites suggests the Earth and the rest of the solar system formed
A) 3.85 billion years ago B) 4.57 billion years ago C) 4.38 billion years ago D) 4.02 billion years ago
A white dwarf star with a mass equal to that of the sun is about the size of
A) the earth. B) a proton. C) the sun. D) a basketball.
A engine goes through a cyclic process. During the cyclic process the engine takes in 3200 J of heat and has a heat output of 2400 J. What is the efficiency of the engine?
A. 10% B. 15% C. 25% D. 40% E. 52%
The following images show the four terrestrial planets in our solar system. Rank the planets from left to right based on the strength of the greenhouse effect occurring at their surfaces, from strongest to weakest.
