What region of the world receives the highest amount of remittance income?
A) Australia
B) Europe (especially western Europe)
C) Latin America
D) North America
E) Sub-Saharan Africa
C
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Using 1000 J of work, a toy elevator is raised from the ground floor to the second floor in 20 s. How much power does the elevator use?
A) 20 W B) 50 W C) 100 W D) 1000 W E) 20,000 W
What is a growing concern related to sea level rise?
A) deforestation as salt in the atmosphere increases B) eroding shorelines in coastal areas C) vanishing land near lakes and rivers D) fish migrating earlier than usual E) migrating birds as salt in the atmosphere increases
Caribbean hurricanes
A) originate in the west Atlantic. B) are relatively rare. C) often enter the Caribbean at the Lesser Antilles. D) are not officially hurricanes until they reach winds of 110 miles per hour. E) are a minor inconvenience, but not a real problem.
When assessing energy resources, it is helpful to use a measure called EROI, which is ________
A) money invested in extraction and processing minus income from sales B) energy returned minus energy invested C) energy returned divided by energy invested D) amount of energy invested minus heat released into the environment E) energy returned plus energy invested