The second law of thermodynamics states that ____
a. energy can be transformed into matter, and because of this, something is obtained for nothing
b. energy can be destroyed during nuclear reactions such as those that occur inside the sun
c. if energy is gained by one region of the universe, another place in the universe also must gain energy in order
to maintain the balance of nature
d. energy tends to flow from concentrated to less concentrated forms
e. energy tends to be stable over time
ANSWER: d
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