Ordinary rain has a pH of about 5.5 to 6 from the carbon dioxide in the atmosphere and from natural sources of acidic sulfur gases.
Answer the following statement true (T) or false (F)
True
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A continental polar (cP) air mass moves into the territory occupied a continental tropical (cT) air mass. What is likely to happen?
A. A stationary front forms. B. The air masses mix creating an air mass of average temperature. C. A cold front forms at the boundary between the two air masses. D. A cold front extends from the boundary zone into the territory occupied by the continental tropical (cT) air mass.
A jumbo jet has a mass of 100,000 kg. The thrust for each of four engines is 50,000 N. What is the jet's acceleration in meters per second squared when taking off?
A) 0.25 B) 1 C) 2 D) 4 E) none of the above
The presence of which of the following indicates the health of a stream or lake?
A) chlorofluorocarbons B) hydrocarbons C) sulfur dioxide D) dissolved oxygen concentrations
Which components of a sphingolipid are collectively known as a ceramide?
A) the fatty acid and phosphate B) the fatty acid and sphingosine C) phosphate and choline D) phosphate and sphingosine