Which of the following objects would produce an emission line spectrum?
A) a hot, low-density neon gas
B) a star like our Sun
C) a light bulb
D) the Earth
A) a hot, low-density neon gas
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A 30.0 cm wrench is used to generate a torque at a bolt. A force of 40 N is applied perpendicularly at the end of the wrench. The torque generated at the bolt is
A. 5.0 N•m. B. 7.0 N•m. C. 9.0 N•m. D. 12 N•m. E. 20 N•m.
Addition by 1. Components: Vector 
has a magnitude of 6.0 m and points 30° south of east. Vector 
has a magnitude of 4.0 m and points 30° west of south. The resultant vector 
+ 
is given by
A. 7.2 m at an angle of 64° south of east. B. 3.3 m at an angle of 64° south of east. C. 9.8 m at an angle of 26° south of east. D. 9.8 m at an angle of 64° south of east. E. 3.3 m at an angle of 26° south of east.
Janice throws a stone horizontally from the roof edge of a 50. meter high dormitory. It hits the ground at a point 60. m from the building. What was the initial velocity?
A) 19. m/s B) 22. m/s C) g m/s D) 5.5 m/s E) 25. m/s
The reason that small planets tend to lose interior heat faster than larger planets is essentially the same as the reason that
A) a large baked potato takes longer to cool than a small baked potato. B) gas bubbles form and rise upward in boiling water. C) Earth contains more metal than the Moon. D) thunderstorms tend to form on hot summer days.