A spectroscopic binary shows periodic variations in its
a. radial velocity.
b. proper motion.
c. brightness.
d. mass.
e. spectral type.
a
You might also like to view...
Which of the following is an example of a galaxy?
A) The Canopus Galaxy B) The Milky Way Galaxy C) The Proxima Centauri Galaxy D) The Alpha Centauri Galaxy
Why does a subcooled liquid reach maximum pool boiling conditions at a superheat lower than the minimum pool boiling superheat temperature?
What will be an ideal response?
A 1.5m long dowel (a cylindrical rod) is pivoted about the end so that it is a pendulum of sorts - it can freely swing in a vertical plane. The dowel has a diameter of 2.0cm, and its density is 3.2 
When it is positioned in its swing such that its angle with the vertical is 22.5 degrees, what is the torque on the rod about the pivot due to its weight?
A. 17Nm B. 42Nm C. 11Nm D. 10Nm E. 44Nm F. 41 Nm
The following three appliances are connected to a 120-V house circuit: i) toaster, 1200 W, ii) coffee pot, 750 W, and iii) microwave, 1000 W. If all were operated at the same time, what total current would they draw?
a. 5.0 A c. 23 A b. 25 A d. 6.0 A