If Saturn takes about 30 years to orbit the Sun, and its rings were seen edge-on in 1995, when did they next appear most open at solstice?
A) 2007 B) 2005 C) 1998 D) 2010 E) 2002
E
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Addition by 1. Components: Vector 
has a magnitude of 8.0 m and points 30° north of east; vector 
has a magnitude of 6.0 m and points 30° west of north; and vector 
has a magnitude of 5.0 m and points 30° west of south. The resultant vector 
+ 
-5.0px;" /> + 
is given by
A. 2.7 m at an angle 74° north of east.
B. 5.9 m at an angle 74° north of east.
C. 4.8 m at an angle 74° east of north.
D. 5.1 m at an angle 74° north of east.
E. 2.1 m at an angle 66° east of north.
A charge Q is uniformly distributed throughout a nonconducting sphere of radius R. The charge density in the sphere is
What will be an ideal response?
If the average density of matter and energy in the Universe is more than the critical density, space-time will be _____
A) closed B) flat C) open D) infinite
A future astronaut exploring Mars would
A) need to stay inside a spacecraft at all times B) be able to walk on the surface at any time wearing only warm clothing C) need to wear a spacesuit at all times D) need to wear a spacesuit only during the winter