In the United States, coal-burning power plants produced what percentage of the electricity in 2015?
A. 2%
B. 9%
C. 33%
D. 52%
E. 68%
Answer: C
You might also like to view...
The light blue area just off the Australian coast, as shown here, is called the
A. seashore. B. continental platform. C. continental shelf. D. abyssal plain.
During a ________ year period starting at about 4.5 billion years ago, bits and pieces of metal-rich particles, rocks, and ices accumulated to form the Earth.
A. 10-300 billion B. 3-10 million C. 30-100 million D. 1-10 million
"Birth dearths" can be a problem because they cause
A. Labor shortages B. A decrease in workers C. Military weakness D. A decrease in taxpayers E. All of these are correct
If a chemist wishes to carry out a reaction in which one reactant is a solid and one is a liquid, which of the following will be most effective in speeding up the reaction?
A) adding more liquid reactant B) grinding the solid to a form a powder C) placing a larger crystal of the solid in the same volume of liquid reactant D) All of the above will be equally effective.