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
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
At what temperatures is radiation emitted from a black body?
What will be an ideal response?
In chlorine gas, the bond between the two chlorine atoms is
a. ionic. b. single covalent. c. triple covalent. d. double covalent.