A radio galaxy whose lobes are swept back as if forming a tail probably indicates
A) evidence for intergalactic matter.
B) there must be another galaxy nearby.
C) the galaxy is about to evolve into a spiral.
D) the galaxy is moving towards Earth.
E) the galaxy is isolated, not part of a cluster.
A
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A sprinter runs 100.0 m in 9.87 seconds. If he travels at constant acceleration for the first 75.0 m and then at constant velocity for the final 25.0 m, what was his peak velocity?
A. 17.7 m/s. B. 15.4 m/s. C. 20.3 m/s. D. 17.5 m/s.
A charged particle (q = -8.0 mC), which moves in a region where the only force acting on the particle is an electric force, is released from rest at point A. At point B the kinetic energy of the particle is equal to 4.8 J. What is the electric potential difference VB - VA?
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