An atom has more protons than electrons. The atom is
A)
a negative ion.
B)
a positive ion.
C)
an insulator.
D)
a conductor.
E)
a semiconductor.
B
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How does the unified model of AGN explain blazars?
a. Blazars are Seyferts galaxies seen edge on. b. Blazars are regions of the intergalactic medium where gas has been heated by a nearby AGN. c. Blazars are relativistic jets from an AGN pointed toward our light of sight. d. Blazars are newly formed AGN from a recently galactic collision.
Compare the internal energy of one gram of steam to that of one gram of water if both are at 100°C.
A. The internal energy of the water and steam are the same B. The internal energy of the steam will be higher C. The internal energy of the water will be higher
What is the particle referred to as a WIMP?
a. the result of a neutrino oscillation b. a hypothetical particle left over from the Big Bang c. a hypothetical particle in the MOND theory d. none of the above
The figure below shows the unusual path of a confused football player. After receiving a kickoff at his own goal, he runs downfield to within inches of a touchdown, then reverses direction and races back until he’s tackled at the exact location where he first caught the ball. During this run, which took 25 s, what is the path length he travels?