Where is the center of mass of a binary system consisting of two stars with different masses?
A) the center of the more massive star
B) the center of the less massive star
C) the point halfway in between the two stars
D) a point between the two stars that is closer to the more massive star
E) a point between the two stars that is closer to the less massive star
D) a point between the two stars that is closer to the more massive star
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Millisecond pulsars _____
a. are created in supernova explosions of the most massive stars b. result from the collision of two neutron stars c. represent the youngest pulsars detected d. result from long-term mass transfer from a companion star e. are a theoretical prediction that has not been observed
If a reflected ray in air at an angle of reflection of 60 
is totally polarized, what is the index of refraction of the reflecting material?
A. 1.50 B. 2.00 C. 1.73 D. 1.15 E. this angle is not possible for an incident ray in air
Which of the following objects would be most likely to produce an emission-line spectrum?
A) a star like our Sun B) a light bulb C) the Earth D) a neon light
The coefficient of linear expansion of ordinary glass is three times that of Pyrex glass. An ordinary glass rod and a Pyrex glass rod of equal lengths at room temperature are dropped into boiling water. The change in length of the ordinary glass rod will be 3 times the change in length of the Pyrex glass rod
a. True b. False Indicate whether the statement is true or false