About 1 ?s after the Big Bang, the temperature of the universe was about 1013 K. What energy (in eV) does this correspond to?
A)
1 neV
B)
1 keV
C)
1 MeV
D)
1 GeV
E)
1 TeV
D
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Fundamental Forces: The two strongest forces that act between protons in a nucleus are
A. the weak nuclear and electromagnetic forces. B. the weak nuclear and the gravitational forces. C. the electrostatic and the gravitational forces. D. the strong nuclear and the electrostatic forces.
The most common form of gas in the disk of the Milky Way galaxy is
A) atomic hydrogen gas. B) molecular hydrogen. C) gas in hot bubbles. D) gas in stellar winds.
The quantity h in the Bohr theory is called ______________
Fill in the blank(s) with correct word
If the two slits in a two-slit apparatus kept the same width, but the distance between the two slits is increased, the number of interference fringes within the diffraction maximum will:
A. decrease B. increase C. may do any of the above. D. remain the same