The modulus ratio used in engineering classification of rocks can be expressed as:
a. the ratio of tangent modulus at 50 percent strength to unconfined compressive strength
b. the ratio of the unconfined compressive strength to tangent modulus at 50 percent strength
c. the ratio of tangent modulus at 50 percent strength to shear strength
d. the ratio of shear strength to tangent modulus at 50 percent strength
a
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A snowball that rolls down a hill, gradually gaining more and more mass and rolling faster and faster as it continues, would be an example of a(n)
A. positive feedback system. B. negative feedback system. C. closed system. D. open system.
A very widespread epidemic of infectious disease spread through human populations is known as a/an_________
a. pandemic b. isodemic c. regidemic d. geodemic e. worldemic
Air that has cooled below the dew point undergoes ________
A) increased stability B) supercooling C) condensation D) evaporation E) evapotranspiration
The conservation ethic suggests that ___________.
Fill in the blank(s) with the appropriate word(s).