If you push for an hour against a stationary wall, no work is done
A) on the wall.
B) at all.
C) both A and B
D) none of the above
A
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If you had this type of deformation of a region, it would
A. thin the crust and cause uplift. B. thicken the crust and cause subsidence. C. thicken the crust and cause uplift. D. thin the crust and cause subsidence. E. None of these choices are correct.
Which of the following two stick structures are different conformations of the same molecule?
A. b and d B. a and d C. b and c D. a and c E. none of the above
Fractional distillation is used in processing ________
A) ethanol fuel B) coal C) natural gas D) crude oil
Why was it difficult to accurately count the number of European immigrants to the U.S between 1840 and 1910?
A) European immigrants didn't have the correct documents. B) Ellis Island had to process too many people at a time. C) Europe experienced frequent boundary changes. D) Many didn't stay very long. E) They didn't have computers back then.