Most experts believe that, for safe disposal, high-level nuclear wastes should be buried for
A) 100,000 to 1 million years.
B) a few million years.
C) 100 to 500 years.
D) 1000 to 10,000 years.
E) as long as humans remain on Earth.
D
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How is Titan different from all the other Jovian satellites?
a. Titan has frozen water on its surface b. Titan has a heavily cratered surface. c. Titan has a thick atmosphere. d. Titan is the largest moon in the Solar System. e. Titan has a young, very reflective surface.
Contrast the deaths of low- versus high-mass stars
What will be an ideal response?
The Earth's temperature increases with depth. Pressure also increases with depth from the weight of the rock above. As pressure increases the
A) rock above begins to melt. B) melting point of the rock (at depth) decreases. C) melting point of the rock (at depth) also increases. D) temperature increases, rocks begin to melt.
Consider the following controls in an automobile: gas pedal, brake, steering wheel. The controls in this list that cause an acceleration of the car are
1.all three controls. 2.the gas pedal and the brake. 3.only the brake. 4.only the gas pedal.