The hidden costs of gasoline amount to about ____ per gallon.
A. 18¢
B. 50¢
C. $2
D. $12
E. $36
Answer: D
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A main difference between gravitational and electric forces is that electrical forces
A) attract. B) repel or attract. C) obey the inverse-square law. D) act over shorter distances. E) are weaker.
The Sun transmits its energy to Earth in the form of ________.
A. electromagnetic radiation B. visible light C. yellow energy D. solar radiation
As the hydronium ion concentration increases, the pH
A. starts to alter the chemical properties of the water molecules. B. starts to affect the OH- concentration. C. stays constant. D. goes down. E. gets larger.
A crystal of potassium feldspar (KAlSi3O8) will produce a variety of weathering products after it is weathered. Which of the following is not a product that results from the weathering of potassium feldspar?
A) silica B) potassium ions C) clay minerals D) iron oxides