A cylindrical space colony 13 km in diameter and 30 km long has been proposed as living quarters for future space explorers. Such a habitat would have cities, land, and lakes on the inside surface and air and clouds in the center. All this would be held in place by the rotation of the cylinder about the long axis. How fast would such a cylinder have to rotate at its perimeter to produce a 1-g
gravitational field at the walls of the cylinder?
a. 200 m/s
c. 650 m rad/s
b. 250 m/s
d. 800 m rad/s
B
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A small source radiates an electromagnetic wave with a single frequency into vacuum, equally in all directions. As the wave moves, its wavelength:
1.increases. 2.decreases. 3.stays constant.
If two straight lines start out parallel but eventually cross, then they must be in a
A) spherical geometry. B) flat geometry. C) saddle-shaped geometry. D) spacetime geometry.
Two carbon cylinders have radii 2r and r and the first has length 2L, while the second has length L. What is the resistance of the first if the resistance of the second is 12 
A. 48 
B. 6
C. 12
D. 24
A bullet is fired with a certain velocity at an angle ? above the horizontal at a location where g = 10.0 m/s2. The initial x- and y-components of its velocity are 86.6 m/s and 50.0 m/s respectively. What is the range of the bullet?
A) 500 m B) 1000 m C) 100 m D) 866 m E) 433 m