An object starts from rest and moves with an acceleration of 2.0 
for 3.0 seconds. It then reduces its acceleration to 1.0
for 5.0 additional seconds. The velocity 8 seconds from the start of the motion is
A. 51 m/s.
B. 38 m/s.
C. 11 m/s.
D. 9.0 m/s.
E. 7.6 m/s.
C. 11 m/s.
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a. True b. False Indicate whether the statement is true or false
The shape of Earth's magnetosphere is modified by
a. the Moon's tidal force. b. the solar wind. c. Earth's own gravity. d. asymmetries in the shape of Earth's core. e. Earth's elliptical orbit.
A jogger runs halfway around a circular path with a radius of 60.0 m. What, respectively, are the magnitude of the displacement and the distance jogged?
a. 60.0 m, 188 m b. 120 m, 188 m c. 0 m, 377 m d. 120 m, 377 m e. 60.0 m, 377 m
Most stars in the Milky Way's halo are
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