Arvin the Ant travels 35 cm eastward, then 25 cm northward, and finally 10 cm westward. What is Arvin's direction of displacement with respect to his original position?
Answer: 45° N of E
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Which of the following statements about circumpolar stars is true at all latitudes?
A) They are the stars close to the north celestial pole. B) They always remain above your horizon. C) They make relatively small circles, traveling clockwise around the north celestial pole. D) Like all other stars, they rise in the east and set in the west. E) You cannot see them from the Southern Hemisphere.
An incompressible fluid is flowing through a horizontal pipe with a constriction. The velocity of the fluid in the wide section of the pipe is 6.00 m/s and the velocity of the fluid in the narrow section of pipe is 8.00 m/s. The pressure of the fluid in the wide section is 250 kPa. What is the pressure in the narrow section of the pipe? (density of the fluid is 1000 
A. 183 kPa B. 236 kPa C. 268 kPa D. 285 kPa E. 298 kPa
The collision of two neutron stars might be detected as what?
A. a nebula. B. an atmospheric window C. an emission-line spectrum. D. a gamma-ray burst. E. All of these choices are correct.
A tall cell-phone tower is 12 cm in diameter over much of the height. A wind blows at 25 m/s. The frequency of the vortices being shed from the tower is nearest:
(A) 44 Hz (B) 33 Hz (C) 22 Hz (D) 0 Hz