Considering the three general types of geometry (flat, spherical, and saddle-shaped). If the spacetime of the universe is infinite, what might the geometry of the universe be?
A) either flat or saddle-shaped
B) flat, spherical, or saddle-shaped
C) only flat
D) either flat or spherical
E) only spherical
A) either flat or saddle-shaped
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The Sun appears to rotate only because Earth is revolving about the Sun
a. True b. False Indicate whether the statement is true or false
An important factor in producing and controlling a fission chain reaction is the fact that _________ neutrons are much better a causing fission in uranium-235
Fill in the blank(s) with correct word
Four 12
resistors are connected together. What is the least resistance that can be attained with these resistors?
A. 12 
B. 6.0
C. 3.0
D. 2.0
E. 1.0
What would the spectrum of hydrogen look like if we could see into the ultraviolet?
What will be an ideal response?