From Earth, the view of the Milky Way is a thin band of stars across the night sky. The part of the Milky Way galaxy that is described here is the:
A) bulge.
B) spiral arm.
C) disk.
D) halo.
E) globular cluster.
C
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The finite wire shown below has a uniformly distributed negative charge. Which of the arrows below is closest to the direction of the field vector that the wire produces at point P? (Point to a letter on the back cover with two fingers to specify a double-letter answer.)
A. A
B. B
C. C
D. D
E. AA
F. BBG. CC
H. DD
A rectangular beam with semicircular notches has dimensions h 5 160 mm and h1 5 140 mm. The maximum allowable bending stress in the plastic beam is ?max 5 6.5 MPa, and the bending moment is M 5 185 N?m. The minimum permissible width of the beam is:
(A) 12 mm
(B) 20 mm
(C) 28 mm
(D) 32 mm
At t = 0, a particle is located at x = 25 m and has a velocity of 15 m/s in the positive x direction. The acceleration of the particle varies with time as shown in the diagram. What is the position of the particle at t = 5.0 s?
A. 175 m B. 125 m C. 138 m D. 154 m E. 165 m
Light behaves primarily as a particle when it
A) travels from one place to another. B) interacts with matter. C) both of these D) neither of these