The sum of the currents through the branches of a parallel circuit
A. equal the current in the battery.
B. are less than the current in any one branch.
C. are more than the current in the battery.
D. all of the above
Answer: A
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Sustainable development ________
A) is technically impossible to accomplish, since resources would still be used up B) is hypothetically attainable but is beyond our current technologies C) involves using resources to meet today's needs without compromising future availability D) ensures an economy that will decline over time, since our economy hinges on the assumption that resources are finite
Given the compounds cis-1,4-dimethylcyclohexane, and trans-1,4-dimethylcyclohexane, which of the following statements is/are true? (i) these two compounds are related as stereoisomers; (ii) cis-1,4-dimethylcyclohexane is chiral; (iii) trans-1,4-dimethylcyclohexane is chiral
A) only (i) is true B) only (i) and (ii) are true C) only (ii) and (iii) are true D) only (i) and (iii) are true
What affects the residence time of an element?
A) Its saturation level B) Its chemical equilibrium in water C) Its chemical activity in water D) The principle of constant proportions
Which of the following statements regarding population density is TRUE?
A) crude population density will always be higher than physiological density B) agricultural density is rarely higher than crude population density in sub-Saharan Africa C) physiological density must be higher than crude population density D) crude population density is higher than agricultural density E) if the crude population density is low, the physiological density will be even lower