Volcanic eruptions on one satellite of the outermost jovian planets, Neptune and Uranus, have been photographed by spacecraft. Which satellite, and what is erupting from this type of volcanism?
What will be an ideal response?
Triton is erupting liquid nitrogen.
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Kinetic Energy: When a proton is traveling at 0.80c, what is the ratio of its kinetic energy to its rest energy?
A. 0.60 B. 0.67 C. 0.80 D. 1.2 E. 1.7
The diagram above represents energy levels in a hydrogen atom. Each level is labeled with its energy (above the ground state of Level 1) in units of electron/volts (eV). The labeled transitions represent an electron moving between energy levels. Which transition represents an electron that is breaking free of the atom?
A) A B) B C) C D) D E) E
The figure shows a uniform rod (length L = 1.0 m, mass = 2.0 kg) suspended from a pivot a distance d = 0.25 m above its center of mass. The angular frequency (in rad/s) for small oscillations is approximately
?
?
a.
1.0.
b.
2.5.
c.
1.5.
d.
4.1.
e.
3.5.
The purpose of the moderator in a reactor is to
A. separate the nuclear fuel from the spent products of fission. B. provide cooling for the control rods. C. reduce the number of neutrons available for the chain reaction. D. slow neutrons down so that they will be more likely to initiate fission reactions.