The visible color of the Galactic Bulge is
A) red from the emission nebulae.
B) blue from the OB associations.
C) black from the dust clouds.
D) yellow from the old Population II stars.
E) brown from the dwarfs in the dark matter.
D
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Suppose you live at latitude 40°N. Which of the following describes the conditions that make a star circumpolar?
A) Stars are circumpolar if they have declination > +50°. B) Stars are circumpolar if they have declination > +40°. C) Stars are circumpolar if they have right ascension > 6 hr. D) Stars are circumpolar if they have right ascension < 6 hr. E) No stars are circumpolar at this latitude.
The equation that solves a problem is 
. The problem is:
A. How far above its initial position does a rock travel in 2.0 s when thrown up from a point 40 m above the ground? B. How far below its initial position does a rock travel in 2.0 s when thrown up from a point 40 m above the ground? C. What is the position relative to the ground of a rock thrown up at 3.0 m/s from a roof 20 m above the ground 2.0 s after it is released? D. What is the change in position relative to the ground of a rock thrown up at 3.0 m/s from a roof 20 m above the ground 2.0 s after it is released? E. What is the position relative to the ground of a rock thrown up at 3.0 m/s from a roof 20 m above the ground if its maximum height is 33.6 m?
How does the declination of the Sun vary over 1 year?
Energy in Capacitors: When a 12.0-V battery causes 2.00 ?C of charge to flow onto the plates of an air-filled capacitor, how much work did the battery do?
A. 24.0 ?J B. 12.0 ?J C. 144 ?J D. 576 J