The combined mass of a binary system is three solar masses. Star A is 1 AU and Star B is 2 AU from the center of mass. What are the masses of Star A and Star B, respectively?
a. 2.5, 0.5 b. 1, 2
c. 2, 1 d. 0.5, 2.5
c
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Addition by 1. Components: Vector 
has a magnitude of 6.0 m and points 30° north of east. Vector 
has a magnitude of 4.0 m and points 30° west of north. The resultant vector 
+ 
is given by
A. 9.8 m at an angle of 64° east of north. B. 9.8 m at an angle of 26° north of east. C. 7.2 m at an angle of 26° east of north. D. 3.3 m at an angle of 26° north of east. E. 3.3 m at an angle of 64° east of north.
Wien's Law: If the surface of our bodies is at 37°C, at what wavelength does the radiation that we emit peak if we behave like a blackbody? The constant in Wien's law is 0.0029 m ? K.
Fill in the blank(s) with the appropriate word(s).
When we enlarge a photograph of an iron ring, the image of the hole becomes
A) smaller. B) larger. C) neither smaller nor larger.
Which of the following is a unit for rotational velocity?
A. hours/radians B. Radians C. Rev/sec D. degrees