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

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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