A measure of the in-place condition of a rock mass is the:
a. hydraulic conductivity
b. unconfined compressive strength
c. shear strength
d. Rock Quality Designation
d
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Complete the following nuclear equation:
Bi ? 
Tl + ??
A. gamma ray
B. 
He
C. 
e
D. both A and B
E. none of the above
Carboniferous age reefs differed from those of the Devonian in that they were much more massive than the older reef structures
Indicate whether the statement is true or false
What would be the principal option for preventing a catastrophic meteorite impact, once a threatening object was identified?
A) changing the orbit of the object with small nuclear explosions B) breaking the object into smaller pieces with nuclear explosions C) evacuate the potentially affected area D) constructing a physical shield around Earth
The ice-sheet climate is the harshest climate zone on Earth
Indicate whether the statement is true or false