The thermocline defines the ___________, and the pycnocline defines the ___________
a) Area where the water density rapidly changes; area where the temperature rapidly changes
b) Area where the water temperature rapidly changes; area where the water density rapidly changes
c) Area where the temperature of the water is at equilibrium; the density of the water is at equilibrium
d) Area where salt concentration rapidly changes; area where oxygen rapidly changes
B
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The average user in Germany upgrades their cellphone every (almost) 4 years, and every 6 1/2 years in Brazil. In the U.S., the average user upgrades their cell phone every
A) less than 2 years. B) 4 years. C) 6 years. D) more than 8 years.
An object that radiates more energy than it absorbs will ____
A) become colder B) become warmer C) maintain the same temperature D) reach radiative equilibrium
Despite their rigidity rocks bend and fold but when stressed far enough, they fracture along cracks called:
A) fractures B) faults C) plate boundaries D) epicenter E) center of stress
The frequency of an electric razor in Europe that completes 50 vibrations in 1 s has a frequency of
A. 50 Hz with a period of 1/50 s. B. 50 Hz with a period of 50 s. C. 1/50 Hz with a period of 50 s. D. 1/50 Hz with a period of 1/50 s.