What is the approximate luminosity of a main-sequence M star?
A) 10?6 solar B) 1 solar C) 10 solar D) 0.01 solar
D
Physics & Space Science
You might also like to view...
Only ________ stars have rotation periods of less than a second
Fill in the blank(s) with correct word
Physics & Space Science
For which of the following is the acceleration constant?
a. Nonuniform speed b. Free fall c. Uniform circular motion d. None of these
Physics & Space Science
As an object is lowered into a deep hole in the surface of the Earth, which of the following must be assumed in regard to its potential energy?
a. It increases. b. It decreases. c. It remains constant. d. One cannot tell from the information given.
Physics & Space Science
An atom has more protons than electrons. The atom is
A) a negative ion. B) a positive ion. C) an insulator. D) a conductor. E) a semiconductor.
Physics & Space Science