A mega-parsec is equivalent to
a. 3.26 light-years.
b. 206,265 AU
c. the age of our solar system
d. a million parsecs.
e. the diameter of the Milky Way galaxy.
D
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Neptune is an evening star, whereas Uranus is a morning star
Indicate whether the statement is true or false
In chlorine gas, the bond between the two chlorine atoms is
a. ionic. b. single covalent. c. triple covalent. d. double covalent.
The figure shows the orientation of a rectangular loop consisting of 80 closely wrapped turns each carrying a current I
The magnetic field in the region is 
mT. The loop can turn about the y axis. If ? = 30°, a = 0.40 m, b = 0.30 m, and I = 8.0 A, what is the magnitude of the torque exerted on the loop?
?
?
a.
2.5 N ? m
b.
1.5 N ? m
c.
3.1 N ? m
d.
2.7 N ? m
e.
0.34 N ? m