A feather and coin dropped in a vacuum accelerate equally due to
A. equal gravitational forces.
B. same ratio of weight to mass.
C. unequal masses.
D. the absence of air resistance.
Answer: B
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Which of the following is true regarding the solubility of liquids and solids?
A) Pressure has virtually no effect on the solubility of liquids or solids. B) Solubility always decreases as pressure decreases. C) Solubility always increases as pressure decreases. D) Solubility usually decreases as pressure decreases.
The fossil record contained in Cenozoic rocks is more complete because ____
a. there have been no extinction events b. climate has been stable c. the rates of plate movement have slowed d. more animals had hard parts e. the rocks are more accessible and have not been deformed
Cities are distinguished by their
A. Dependence on natural resource-based occupations B. Strong traditions and cultural character C. Differentiated, specialized jobs and functions D. Sheer size E. Large groups of interdependent households
In this atmospheric layer, the temperature is relatively constant for the first 10 kilometers, then it increases:
A) troposphere. B) mesosphere. C) thermosphere. D) stratosphere.