Most of the deuterium that formed right after the Big Bang
A) is still around today.
B) broke down into electrons and neutrons.
C) turned into dark matter.
D) quickly burned into helium nuclei.
E) was found in the globular clusters.
D
You might also like to view...
According to this diagram, how much more abundant is hydrogen in the universe than nitrogen?
A) Hydrogen is about 10,000 times as abundant as nitrogen. B) Hydrogen is about 30% more abundant than nitrogen. C) Hydrogen is about 10 times as abundant as nitrogen. D) Hydrogen is about 4 times as abundant as nitrogen.
Why does the Big Bang theory predict that the cosmic background radiation should have a perfect thermal radiation spectrum?
A) The background radiation came from the heat of the universe, with a peak corresponding to the temperature of the universe. B) The spectrum of pure hydrogen is a perfect thermal radiation spectrum. C) The spectrum of 75 percent hydrogen and 25 percent helium is a perfect thermal radiation spectrum. D) The light from all the stars and gas in the sky averaged over the entire universe is a perfect thermal radiation spectrum. E) It doesn't predict that the cosmic background radiation should have a perfect thermal radiation spectrum.
What do meteorites reveal about the solar system?
A) They reveal that the solar system once contained 10 planets. B) They reveal that the early solar system consisted mostly of hydrogen and helium gas. C) They reveal that the age of the solar system is approximately 4.6 billion years. D) They reveal that meteorites are much older than the comets and planets. E) Nothing, because they come from other star systems.
The magnetic field lines generated by a bar magnet
A) are external only. B) are both external and internal to the magnet. C) follow an inverse-square law. D) none of the above