Two objects of the same size but unequal weights are dropped from a tall tower. Taking air resistance into consideration, the object to hit the ground first will be
A) the lighter object.
B) the heavier object.
C) both hitting at the same time
D) not enough information
B
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The share of U.S. sales accounted for by the Detroit 3 has declined from ________ percent in 1995 to ________ percent in 2010
A) 95; 85 B) 100; 50 C) 75; 45 D) 70; 10 E) 30; 25
The advantage of using wind energy is that it ____
A)is cheaper to produce energy with wind than with natural gas B)can be harnessed from any location C)is always "on," so there is not a need for back-up generation methods D)allows for multiple uses of the land E)kills fewer birds than buildings and power lines
A fixed volcanic hot spot on Earth tends to produce a ________ on a moving plate.
A. transform fault system B. submarine canyon and associated abyssal hills C. series of volcanic peaks D. high landmass with a fixed location E. trench
Which of the following is a recent human impact on the nitrogen cycle?
A) nitrogen mining B) the Haber-Bosch process C) bacterial nitrification D) introducing legumes into plant rotation E) biological nitrogen fixation