What does a breeder reactor do?
a. Produces plutonium from uranium and thereby creates more nuclear fuel than it uses.
b. Creates independent chain reactions that then separate from their parents and become new energy sources.
c. Uses controlled rates of reaction to conserve nuclear fuel.
d. Creates its own neutron bombardment beam out of the neutrons that escape from the uranium as it decays.
e. Creates its own control rods out of the lead resulting from uranium decay.
a
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Which of the following moons is considered likely to have a deep, subsurface ocean of liquid water?
A) Europa B) Io C) Miranda D) Triton
The possibility of life being transferred from another planet like Mars largely depends on whether that life can survive
A) being lasted from the parent planet B) inside the meteorite with very little water present C) long enough in space to make the journey to Earth D) the impact onto the Earth's surface
A solar eclipse occurs when the Moon is at or
near a) full phase. b) new phase. c) first-quarter phase. d) last-quarter phase.
A circular cylinder of height 1.20 m having faces of diameter 0.620 m is immersed in water of density 1.00 × 103 kg/m3 with its axis vertical so that its faces are parallel to the surface of the water
The upper face is 2.50 m below the surface of the water. The net force on this cylinder is observed to be 1120 N downward. Atmospheric pressure is 1.01 × 105 Pa. What net force does the water exert on the lower face of the cylinder? A) 7.40 × 103 N B) 1.09 × 104 N C) 3.79 × 104 N D) 4.14 × 104 N E) 1.37 × 105 N