The actual fission reactions that release energy in a nuclear power plant are about
A) two-thirds from uranium-235 and one-third from uranium-239.
B) one-third from uranium-235 and two-thirds from uranium-239.
C) two-thirds from uranium-235 and one-third from plutonium-239.
D) one-third from uranium-235 and two-thirds from plutonium-239.
C
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Which is not a danger associated with volcanic ash?
A) Ash gets caught in jet engines causing them to fail. B) Ash can set fire to everything it falls on. C) Ash can cause roofs to collapse. D) Ash, if exposed to enough heat, can turn back to lava.
Internal waves occur at the boundary between water layers of two different densities
Indicate whether the statement is true or false
Which of the following types of forest management is closest to sustainable forestry principles?
A) Shelter-wood cutting and selective cutting B) Selective cutting and clear-cutting C) Clear-cutting and shelter-wood cutting D) Clear-cutting followed by burning the cut areas
When seawater absorbs solar radiation, the absorbed energy results in an increase in the specific heat of the water molecules.
Answer the following statement true (T) or false (F)