When you stretch a rubber band, you are applying
A. compressional stress.
B. simple stress.
C. tensional stress.
D. none of the above
Answer: C
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Joints are:
A) cracks where some displacement of the rock occurred. B) cracks where no displacement of the rock occurred. C) fractures where some displacement has occurred. D) fractures where no displacement has occurred.
What is an El Niño/Southern Oscillation (ENSO) event? La Niña? How are they connected to each other?
Vasco Nuñez de Balboa (1475-1519)
What will be an ideal response?
Whether using a food crop as a source of biofuels is environmentally sustainable would depend upon all of the following, EXCEPT ________
A) the corporate profits that would be made B) the amount of fertilizers used and their impact on aquatic ecosystems C) the amount of pesticides used and their impact on biodiversity and groundwater D) the impact on food supplies and prices E) the amount of water and land necessary for the crops