Of the following statements about seawater salinity, which is/are true?
-An increase in salinity causes a corresponding decrease in electrical conductivity.
-The two most common dissolved components in seawater are sodium and chloride.
-Seawater salinity averages 35‰.
-Seawater salinity averages 3.5%.
-Seawater salinity does not vary from place to place in the ocean.
-The two most common dissolved components in seawater are sodium and chloride.
-Seawater salinity averages 35‰.
-Seawater salinity averages 3.5%.`
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A 10-kg block with an initial velocity of 10 m/s slides 10 m across a horizontal surface and comes to rest. It takes the block 2 s to stop. The stopping force acting on the block is about
A) 5 N. B) 10 N. C) 25 N. D) 50 N. E) none of the above
Using standard time zones, if a country is 60 degrees to the east of you, theoretically, it would be:
A) four hours behind you B) four hours ahead of you C) three hours ahead of you D) three hours behind you E) the same time as your location
Winds and currents can create variations in local sea level changes
a. True b. False
Which of the following is the most abundant long-lived greenhouse gas in our atmosphere?
A) Methane B) Water vapor C) Nitrous oxide D) Carbon dioxide