A fragment of a collapsing gas cloud that comes to equilibrium with a central temperature of 4 million K will become a:
A) black hole.
B) brown dwarf.
C) black dwarf.
D) T Tauri star.
E) stage 1 protostar.
B
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Does the uncertainty principle affect our ability to follow the path of a baseball? Why or why not?
A) no, because the uncertainties in the position and momentum of the baseball are so small in comparison to its size and total momentum that they are unnoticeable B) yes, because we cannot know both where the baseball is and which way it is going at the same time C) no, because the exclusion principle says that large objects are excluded from the consequences of the uncertainty principle D) no, because the uncertainty principle applies only to electrons
How do astronomers know that the Crab Nebula is the remains of a supernova?
What will be an ideal response?
The mysterious component if the universe which appears to be pushing galaxies apart is referred to as
A) dark energy B) anti-gravity C) dark matter D) inflation
The strong nuclear force is
a. strongly repulsive for distances less than 10^-14 m and strongly attractive for larger distances. b. zero for distances less than 10-14 m and strongly attractive for larger distances. c. strongly attractive for distances less than 10^-14 m and zero for larger distances. d. strongly attractive for distances less than 10^-14 m and repulsive for larger distances.